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Kafe 바로가기국가/구분 | United States(US) Patent 등록 |
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국제특허분류(IPC7판) |
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출원번호 | US-0211628 (2002-08-02) |
발명자 / 주소 |
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출원인 / 주소 |
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인용정보 | 피인용 횟수 : 85 인용 특허 : 187 |
Alumina-zirconia materials and methods of making the same. Embodiments of the invention include abrasive particles. The abrasive particles can be incorporated into a variety of abrasive articles, including bonded abrasives, coated abrasives, nonwoven abrasives, and abrasive brushes.
What is claimed is: 1. Amorphous material comprising Al2O3, ZrO2, and a metal oxide other than Al2O3 or ZrO2, wherein the ZrO2 is present in an amount of at least 15 precent by weight, based on the total weight of the amorphous material, wherein at least a portion of the metal oxide other than Al 2
What is claimed is: 1. Amorphous material comprising Al2O3, ZrO2, and a metal oxide other than Al2O3 or ZrO2, wherein the ZrO2 is present in an amount of at least 15 precent by weight, based on the total weight of the amorphous material, wherein at least a portion of the metal oxide other than Al 2O3 or ZrO2 forms a distinct crystalline phase if the amorphous material is crystallized, wherein the amorphous material comprises at least 50 percent by weight collectively of the Al2 O3 and the ZrO2, based on the total weight of the amorphous material, wherein the amorphous material contains not more than 20 percent by weight collectively As2O3, B2 O3, GeO2, P2O5, SiO2, TeO 2, and V2O5, based on the total weight of the amorphous material, wherein the amorphous material has x, y, and z dimensions each perpendicular to each other, and wherein each of the x, y, and z dimensions is at least 25 micrometers. 2. The amorphous material according to claim 1 wherein the amorphous material does not have a Tg. 3. The amorphous material according to claim 1 comprising at least 35 percent by weight Al2O3, based on the total weight of the amorphous material. 4. The amorphous material according to claim 1 comprising Al2O3 in a range of about 55 to about 65 percent by weight to a range of about 45 to about 35 percent by weight ZrO2, based on the total Al2O3 and ZrO2 content of the amorphous material. 5. The amorphous material according to claim 1 wherein the metal oxide other than Al2O3 or ZrO2 is TiO 2. 6. Ceramic comprising the amorphous material according to claim 1. 7. The ceramic according to claim 6 wherein the amorphous material is glass. 8. A method for making amorphous material comprising Al 2O3, ZrO2, and a metal oxide other than Al 2O3 or ZrO2, wherein the ZrO2 is present in an amount of at least 15 percent by weight, based on the total weight of the amorphous material, wherein at least a portion of the metal oxide other than Al2O3 or ZrO2 forms a distinct crystalline phase if the amorphous material is crystallized, wherein the amorphous material comprises at least 50 percent by weight collectively of the Al2O3 and the ZrO2, based on the total weight of the amorphous material, wherein the amorphous material contains not more than 20 percent by weight collectively As2O3, B2O3, GeO2, P2O5, SiO 2, TeO2, and V2O5, based on the total weight of the amorphous material, wherein the amorphous material has x, y, and z dimensions each perpendicular to each other, and wherein each of the x, y, and z dimensions is at least 25 micrometers, the method comprising: melting sources of at least Al2O3, ZrO 2, and a metal oxide other than Al2O3 or ZrO2 to provide a melt; and cooling the melt to provide the amorphous material. 9. Glass-ceramic comprising Al2O3, ZrO 2, and a metal oxide other than Al2O3 or ZrO 2, wherein at least a portion of the metal oxide other than Al 2O3 or ZrO2 is present as at least one distinct crystalline phase, wherein the glass-ceramic comprises at least 50 percent by weight collectively of the Al2O3 and the ZrO2, based on the total weight of the glass-ceramic, wherein the glass-ceramic contains not more than 20 percent by weight collectively As2O3, B2O3, GeO 2, P2O5, SiO2, TeO2, and V 2O5, based on the total weight of the glass-ceramic, wherein the glass-ceramic has x, y, and z dimensions each perpendicular to each other, and wherein each of the x, y, and z dimensions is at least 25 micrometers. 10. A method for making glass-ceramic, the method comprising: heat-treating amorphous material such that at least a portion of the amorphous material is converted to a glass-ceramic, wherein the amorphous material comprises Al2O3, ZrO2, and a metal oxide other than Al2O3 or ZrO2, wherein at least a portion of the metal oxide other than Al2O 3 or ZrO2 forms a distinct crystalline phase during the heat-treating, wherein the amorphous material comprises at least 50 percent by weight collectively of the Al2O3 and the ZrO2, based on the total weight of the amorphous material, wherein the amorphous material contains not more than 20 percent by weight collectively As2O3, B2O3, GeO2, P2O5, SiO2, TeO2, and V2O5, based on the total weight of the amorphous material, wherein the amorphous material has x, y, and z dimensions each perpendicular to each other, wherein each of the x, y, and z dimensions is at least 25 micrometers, wherein the glass-ceramic comprises Al 2O3, ZrO2, and a metal oxide other than Al 2O3 or ZrO2, wherein at least a portion of the metal oxide other than Al2O3 or ZrO2 is present as at least one distinct crystalline phase, wherein the glass-ceramic comprises at least 50 percent by weight collectively of the Al 2O3 and the ZrO2, based on the total weight of the glass-ceramic, wherein the glass-ceramic contains not more than 20 percent by weight collectively As2O3, B2O 3, GeO2, P2O5, SiO2, TeO 2, and V2O5, based on the total weight of the glass-ceramic, wherein the glass-ceramic has x, y, and z dimensions each perpendicular to each other, and wherein each of the x, y, and z dimensions is at least 25 micrometers. 11. A plurality of abrasive particles having a specified nominal grade, wherein at least a portion of the abrasive particles is a plurality of abrasive particles comprising a glass-ceramic, wherein the glass-ceramic comprises Al2O3, at least 15 percent by weight ZrO2, based on the total weight of the glass-ceramic of each particle of the portion, and Y2O3, wherein at least a portion of the Y2O3 is present as at least one distinct crystalline phase. 12. A plurality of abrasive particles having a specified nominal grade, wherein at least a portion of the abrasive particles is a plurality of abrasive particles comprising a glass-ceramic, wherein the glass-ceramic comprises Al2O3, at least 15 percent by weight ZrO2, based on the total weight of the glass-ceramic of each particle of the portion, and REO, wherein at least a portion of the REO is present as at least one distinct crystalline phase. 13. A plurality of abrasive particles having a specified nominal grade, wherein at least a portion of the abrasive particles is a plurality of abrasive particles comprising a glass-ceramic, wherein the glass-ceramic comprises Al2O3, at least 15 percent by weight ZrO2, based on the total weight of the glass-ceramic of each particle of the portion, and contains not more than 10 percent by weight collectively As2O3, B2O3, GeO2, P2O5, SiO2, TeO2, and V2O5, based on the total weight of the glass-ceramic of each particle of the portion, wherein the glass-ceramic of at least some of the portion of abrasive particles has x, y, and z dimensions each perpendicular to each other, and wherein each of the x, y, and z dimensions is at least 25 micrometers. 14. A plurality of abrasive particles having a specified nominal grade, wherein at least a portion of the abrasive particles is a plurality of abrasive particles comprising a glass-ceramic, wherein the glass-ceramic comprises Al2O3, ZrO2, and a metal oxide other than Al2O3 or ZrO2, wherein at least a portion of the metal oxide other than Al2O3 or ZrO2 is present as at least one distinct crystalline phase, wherein the glass-ceramic of each particle of the portion collectively comprises at least 50 percent by weight collectively of the Al2 O3 and the ZrO2, based on the total weight of the glass-ceramic of each particle of the portion, wherein the glass-ceramic of each particle of the portion contains not more than 20 percent by weight collectively As2O3, B2O3, GeO 2, P2O5, SiO2, TeO2, and V 2O5, based on the total weight of the glass-ceramic of each particle of the portion. 15. A method for making abrasive particles, the method comprising: providing a plurality of particles having a specified nominal grade, wherein at least a portion of the particles is a plurality of particles comprising an amorphous material, wherein the amorphous material comprises Al2O3, ZrO2, and a metal oxide other than Al2O3 or ZrO2, wherein at least a portion of the metal oxide other than Al2O3 or ZrO2 forms a distinct crystalline phase during heat-treating, wherein the amorphous material comprises at least 50 percent by weight collectively of the Al2O3 and the ZrO2, based on the total weight of the amorphous material, wherein the amorphous material contains not more than 20 percent by weight collectively As 2O3, B2O3, GeO2, P2O 5, SiO2, TeO2, V2O5, based on the total weight of the amorphous material; and heat-treating the particles comprising amorphous material to provide abrasive particles comprising a glass-ceramic such that at least a portion of the amorphous material is converted to a glass-ceramic and such that a plurality of abrasive particles having a specified nominal grade is provided, wherein at least a portion of the abrasive particles is a plurality of the abrasive particles comprising the glass-ceramic, wherein the glass-ceramic comprises the Al2O3, the ZrO2, and the metal oxide other than Al2O3 or ZrO2, wherein at least a portion of the metal oxide other than Al2O3 or ZrO2 is present as at least one distinct crystalline phase, wherein the glass-ceramic of each particle of the portion collectively comprises at least 50 percent by weight collectively of the Al2O3 and the ZrO2, based on the total weight of the glass-ceramic of each particle of the portion, wherein the glass-ceramic of each particle of the portion contains not more than 20 percent by weight collectively As2O3, B 2O3, GeO2, P2O5, SiO2, TeO2, and V2O5, based on the total weight of the glass-ceramic of each particle of the portion. 16. A method for making abrasive particles, the method comprising: heat-treating particles comprising an amorphous material such that at least a portion of the amorphous material is converted to a glass-ceramic, wherein the amorphous material comprises Al2O3, ZrO2, and a metal oxide other than Al2O3 or ZrO2, wherein at least a portion of the metal oxide other than Al2O3 or ZrO2 forms a distinct crystalline phase during the heat-treating, wherein the amorphous material comprises at least 50 percent by weight collectively of the Al2O3 and the ZrO2, based on the total weight of the amorphous material, wherein the amorphous material contains not more than 20 percent by weight collectively As2O3, B2O 3, GeO2, P2O5, SiO2, TeO 2, and V2O5, based on the total weight of the amorphous material, wherein the glass-ceramic comprises the Al2 O3, the ZrO2, and the metal oxide other than Al 2O3 or ZrO2, wherein at least a portion of the metal oxide other than Al2O3 or ZrO2 is present as at least one distinct crystalline phase, wherein the glass-ceramic of each particle of the portion collectively comprises at least 50 percent by weight collectively of the Al2O3 and the ZrO2, based on the total weight of the glass-ceramic of each particle of the portion, wherein the glass-ceramic of each particle of the portion contains not more than 20 percent by weight collectively As2O3, B2O3, GeO2, P 2O5, SiO2, TeO2, and V2O 5, based on the total weight of the glass-ceramic of each particle of the portion; and grading the abrasive particles comprising the glass-ceramic to provide a plurality of abrasive particles having a specified nominal grade, wherein at least a portion of the plurality of abrasive particles is a plurality of the abrasive particles comprising the glass-ceramic. 17. A method for making abrasive particles, the method comprising: heat-treating ceramic comprising an amorphous material such that at least a portion of the amorphous material is converted to a glass-ceramic, wherein the amorphous material comprises Al2O3, ZrO2, and a metal oxide other than Al2O3 or ZrO2, wherein at least a portion of the metal oxide other than Al2O3 or ZrO2 forms a distinct crystalline phase during the heat-treating, wherein the amorphous material comprises at least 50 percent by weight collectively of the Al2O3 and the ZrO2, based on the total weight of the amorphous material, wherein the amorphous material contains not more than 20 percent by weight collectively As2O3, B2O 3, GeO2, P2O5, SiO2, TeO 2, and V2O5, based on the total weight of the amorphous material, wherein the glass-ceramic comprises the Al2 O3, the ZrO2, and the metal oxide other than Al 2O3 or ZrO2, wherein at least a portion of the metal oxide other than Al2O3 or ZrO2 is present as at least one distinct crystalline phase, wherein the glass-ceramic comprises at least 50 percent by weight collectively of the Al 2O3 and the ZrO2, based on the total weight of the glass-ceramic, wherein the glass-ceramic contains not more than 20 percent by weight collectively As2O3, B2O 3, GeO2, P2O5, SiO2, TeO 2, and V2O5, based on the total weight of the glass-ceramic; crushing the glass-ceramic to provide abrasive particles comprising the glass-ceramic; and grading the abrasive particles comprising the glass-ceramic to provide a plurality of abrasive particles having a specified nominal grade, wherein at least a portion of the plurality of abrasive particles is a plurality of the abrasive particles comprising the glass-ceramic. 18. The method according to claim 17 wherein the amorphous material has x, y, and z dimensions each perpendicular to each other, wherein each of the x, y, and z dimensions is at least 25 micrometers, and the glass-ceramic has x, y, and z dimensions each perpendicular to each other, wherein each of the x, y, and z dimensions is at least 25 micrometers. 19. A method for making abrasive particles, the method comprising: providing a plurality of particles having a specified nominal grade, wherein at least a portion of the particles is a plurality of particles comprising an amorphous material, wherein the amorphous material comprises Al2O3, at least 15 percent by weight ZrO2, based on the total weight of the amorphous material, and Y2O3, wherein at least a portion of the Y2O 3 forms a distinct crystalline phase during heat-treating; and heat-treating the particles comprising amorphous material to provide abrasive particles comprising a glass-ceramic such that at least a portion of the amorphous material is converted to a glass-ceramic and such that a plurality of abrasive particles having a specified nominal grade is provided, wherein at least a portion of the abrasive particles is a plurality of the abrasive particles comprising the glass-ceramic, wherein the glass-ceramic comprises the Al2O3, the at least 15 percent by weight ZrO2, based on the total weight of the glass-ceramic of each particle of the portion, and the Y2 O3, wherein at least a portion of the Y2O3 is present as at least one distinct crystalline phase. 20. A method for making abrasive particles, the method comprising: heat-treating particles comprising an amorphous material such that at least a portion of the amorphous material is converted to a glass-ceramic, wherein the amorphous material comprises Al2O3, at least 15 percent by weight ZrO2, based on the total weight of the amorphous material, and Y2O3, wherein at least a portion of the Y2O3 forms a distinct crystalline phase during the heat-treating, wherein the glass-ceramic comprises the Al 2O3, the at least 15 percent by weight ZrO2, based on the total weight of the amorphous material, and the Y2O 3, wherein at least a portion of the Y2O3 is present as at least one distinct crystalline phase; and grading the abrasive particles comprising the glass-ceramic to provide a plurality of abrasive particles having a specified nominal grade, wherein at least a portion of the plurality of abrasive particles is a plurality of the abrasive particles comprising the glass-ceramic. 21. A method for making abrasive particles, the method comprising: heat-treating ceramic comprising an amorphous material such that at least a portion of the amorphous material is converted to a glass-ceramic, wherein the amorphous material comprises Al2O3, at least 15 percent by weight ZrO2, based on the total weight of the amorphous material, and Y2O3, wherein at least a portion of the Y2O3 forms a distinct crystalline phase during the heat-treating, wherein the glass-ceramic comprises the Al 2O3, the at least 15 percent by weight ZrO2, based on the total weight of the amorphous material, and the Y2O 3, wherein at least a portion of the Y2O3 is present as at least one distinct crystalline phase; crushing the glass-ceramic to provide abrasive particles comprising the glass-ceramic; and grading the abrasive particles comprising the glass-ceramic to provide a plurality of abrasive particles having a specified nominal grade, wherein at least a portion of the plurality of abrasive particles is a plurality of the abrasive particles comprising the glass-ceramic. 22. A method for making abrasive particles, the method comprising: providing a plurality of particles having a specified nominal grade, wherein at least a portion of the particles is a plurality of particles comprising an amorphous material, wherein the amorphous material comprises Al2O3, at least 15 percent by weight ZrO2, based on the total weight of the amorphous material, and REO, wherein at least a portion of the REO forms a distinct crystalline phase during heat-treating; and heat-treating the particles comprising amorphous material to provide abrasive particles comprising a glass-ceramic such that at least a portion of the amorphous material is converted to a glass-ceramic and such that a plurality of abrasive particles having a specified nominal grade is provided, wherein at least a portion of the abrasive particles is a plurality of the abrasive particles comprising the glass-ceramic, wherein the glass-ceramic comprises the Al2O3, the at least 15 percent by weight ZrO2, based on the total weight of the glass-ceramic of each particle of the portion, and the REO, wherein at least a portion of the REO is present as at least one distinct crystalline phase. 23. A method for making abrasive particles, the method comprising: heat-treating particles comprising an amorphous material such that at least a portion of the amorphous material is converted to a glass-ceramic, wherein the amorphous material comprises Al2O3, at least 15 percent by weight ZrO2, based on the total weight of the amorphous material, and REO, wherein at least a portion of the REO forms a distinct crystalline phase during the heat-treating, wherein the glass-ceramic comprises the Al2O3, the at least 15 percent by weight ZrO2, based on the total weight of the amorphous material, and the REO, wherein at least a portion of the REO is present as at least one distinct crystalline phase; and grading the abrasive particles comprising the glass-ceramic to provide a plurality of abrasive particles having a specified nominal grade, wherein at least a portion of the plurality of abrasive particles is a plurality of the abrasive particles comprising the glass-ceramic. 24. A method for making abrasive particles, the method comprising: heat-treating ceramic comprising an amorphous material such that at least a portion of the amorphous material is converted to a glass-ceramic, wherein the amorphous material comprises Al2O3, at least 15 percent by weight ZrO2, based on the total weight of the amorphous material, and REO, wherein at least a portion of the REO forms a distinct crystalline phase during the heat-treating, wherein the glass-ceramic comprises the Al2O3, the at least 15 percent by weight ZrO2, based on the total weight of the amorphous material, and the REO, wherein at least a portion of the REO is present as at least one distinct crystalline phase; crushing the glass-ceramic to provide abrasive particles comprising the glass-ceramic; and grading the abrasive particles comprising the glass-ceramic to provide a plurality of abrasive particles having a specified nominal grade, wherein at least a portion of the plurality of abrasive particles is a plurality of the abrasive particles comprising the glass-ceramic. 25. A method for making abrasive particles, the method comprising: providing a plurality of particles having a specified nominal grade, wherein at least a portion of the particles is a plurality of particles comprising an amorphous material, wherein the amorphous material comprises Al2O3, at least 15 percent by weight ZrO2, based on the total weight of the amorphous material of each particle of the portion, and contains not more than 10 percent by weight collectively As2O3, B2O3, GeO2, P2O5, SiO2, TeO2, and V2O5, based on the total weight of the amorphous material of each particle of the portion, wherein the amorphous material of at least some of the portion of particles has x, y, and z dimensions each perpendicular to each other, and wherein each of the x, y, and z dimensions is at least 25 micrometers; and heat-treating the particles comprising the amorphous material to provide abrasive particles comprising a glass-ceramic such that at least a portion of the amorphous material is converted to a glass-ceramic and such that a plurality of abrasive particles having a specified nominal grade is provided, wherein at least a portion of the abrasive particles is a plurality of the abrasive particles comprising the glass-ceramic, wherein the glass-ceramic comprises the Al2O3, the at least 15 percent by weight ZrO2, based on the total weight of the glass-ceramic of each particle of the portion, and contains not more than 10 percent by weight collectively As2O3, B2O3, GeO2, P2O5, SiO 2, TeO2, and V2O5, weight of the glass-ceramic of each particle of the portion, wherein the glass-ceramic of at least some of the portion of abrasive particles has x, y, and z dimensions each perpendicular to each other, and wherein each of the x, y, and z dimensions is at least 25 micrometers. 26. A method for making abrasive particles, the method comprising: heat-treating particles comprising an amorphous material such that at least a portion of the amorphous material is converted to a glass-ceramic, wherein the amorphous material comprises Al2O3, at least 15 percent by weight ZrO2, based on the total weight of the amorphous material of each particle comprising the amorphous material, and contains not more than 10 percent by weight collectively As2O3, B2O3, GeO2, P 2O5, SiO2, TeO2, and V2O 5, based on the total weight of the amorphous material of each particle comprising the amorphous material, wherein the amorphous material of at least some of the particles has x, y, and z dimensions each perpendicular to each other, and wherein each of the x, y, and z dimensions is at least 25 micrometers, wherein the glass-ceramic comprises the Al2O3, the at least 15 percent by weight ZrO2, based on the total weight of the glass-ceramic of each particle comprising the glass-ceramic, and contains not more than 10 percent by weight collectively As2O3, B2O 3, GeO2, P2O5, SiO2, TeO 2, and V2O5, based on the total weight of the amorphous material of each particle of the portion, wherein the glass-ceramic of at least some of the particles has x, y, and z dimensions each perpendicular to each other, and wherein each of the x, y, and z dimensions is at least 25 micrometers; and grading the abrasive particles comprising the glass-ceramic to provide a plurality of abrasive particles having a specified nominal grade, wherein at least a portion of the plurality of abrasive particles is a plurality of the abrasive particles comprising the glass-ceramic. 27. A method for making abrasive particles, the method comprising: heat-treating ceramic comprising an amorphous material such that at least a portion of the amorphous material is converted to a glass-ceramic, wherein the amorphous material comprises Al2O3, at least 15 percent by weight ZrO2, based on the total weight of the amorphous material, and contains not more than 10 percent by weight collectively As2O3, B2O3, GeO2, P2O5, SiO2, TeO2, and V2O5, based on the total weight of the amorphous material, wherein the amorphous material has x, y, and z dimensions each perpendicular to each other, and wherein each of the x, y, and z dimensions is at least 25 micrometers, wherein the glass-ceramic comprises the Al2O3, the at least 15 percent by weight ZrO2, based on the total weight of the glass-ceramic, and contains not more than 10 percent by weight collectively As2O 3, B2O3, GeO2, P2O5, SiO2, TeO2, and V2O5, based on the total weight of the glass-ceramic, wherein the glass-ceramic has x, y, and z dimensions each perpendicular to each other, and wherein each of the x, y, and z dimensions is at least 25 micrometers; crushing the glass-ceramic to provide abrasive particles comprising the glass-ceramic; and grading the abrasive particles comprising the glass-ceramic to provide a plurality of abrasive particles having a specified nominal grade, wherein at least a portion of the plurality of abrasive particles is a plurality of the abrasive particles comprising the glass-ceramic. 28. A method of abrading a surface, the method comprising: providing an abrasive article comprising a binder and a plurality of abrasive particles, wherein at least a portion of the abrasive particles is a plurality of abrasive particles comprising a glass-ceramic, wherein the glass-ceramic comprises Al2O3 , at least 15 percent by weight ZrO2, based on the total weight of the glass-ceramic of each particle of the portion, and Y2O 3, wherein at least a portion of the Y2O3 is present as at least one distinct crystalline phase; contacting at least one of the abrasive particles comprising the glass-ceramic with a surface of a workpiece; and moving at least one of the contacted abrasive particles comprising the glass-ceramic or the contacted surface to abrade at least a portion of the surface with the contacted abrasive particles comprising the glass-ceramic. 29. A method of abrading a surface, the method comprising: providing an abrasive article comprising a binder and a plurality of abrasive particles, wherein at least a portion of the abrasive particles is a plurality of abrasive particles comprising a glass-ceramic, wherein the glass-ceramic comprises Al2O3 , at least 15 percent by weight ZrO2, based on the total weight of the glass-ceramic of each particle of the portion, and REO, wherein at least a portion of the REO is present as at least one distinct crystalline phase; contacting at least one of the abrasive particles comprising the glass-ceramic with a surface of a workpiece; and moving at least one of the contacted abrasive particles comprising the glass-ceramic or the contacted surface to abrade at least a portion of the surface with the contacted abrasive particles comprising the glass-ceramic. 30. A method of abrading a surface, the method comprising: providing an abrasive article comprising a binder and a plurality of abrasive particles, wherein at least a portion of the abrasive particles is a plurality of abrasive particles comprising a glass-ceramic, wherein the glass-ceramic comprises Al2O3 , at least 15 percent by weight ZrO2, based on the total weight of the glass-ceramic of each particle comprising the glass-ceramic of each particle of the portion, and contains not more than 10 percent by weight collectively As2O3, B2O3, GeO2, P2O5, SiO2, TeO2, and V2O5, based on the total weight of the glass-ceramic of each particle comprising the glass-ceramic of each particle of the portion, wherein the glass-ceramic of at least some of the particles has x, y, and z dimensions each perpendicular to each other, and wherein each of the x, y, and z dimensions are at least 25 micrometers; contacting at least one of the abrasive particles comprising the glass-ceramic with a surface of a workpiece; and moving at least one of the contacted abrasive particles comprising the glass-ceramic or the contacted surface to abrade at least a portion of the surface with the contacted abrasive particles comprising the glass-ceramic. 31. A method of abrading a surface, the method comprising: providing an abrasive article comprising a binder and a plurality of abrasive particles, wherein at least a portion of the abrasive particles is a plurality of abrasive particles comprising a glass-ceramic, wherein the glass-ceramic comprises Al2O3 , ZrO2, and a metal oxide other than Al2O3 or ZrO2, wherein at least a portion of the metal oxide other than Al2O3 or ZrO2 is present as at least one distinct crystalline phase, wherein the glass-ceramic of each particle of the portion collectively comprises at least 50 percent by weight collectively of the Al2O3 and the ZrO2, based on the total weight of the glass-ceramic, wherein the glass-ceramic of each particle of the portion contains not more than 20 percent by weight collectively As2O3, B2O3, GeO 2, P2O5, SiO2, TeO2, and V 2O5, based on the total weight of the glass-ceramic, wherein the glass-ceramic of at least some of the portion of abrasive particles has x, y, and z dimensions each perpendicular to each other, and wherein each of the x, y, and z dimensions are at least 25 micrometers; contacting at least one of the abrasive particles comprising the glass-ceramic with a surface of a workpiece; and moving at least one of the contacted abrasive particles comprising the glass-ceramic or the contacted surface to abrade at least a portion of the surface with the contacted abrasive particles comprising the glass-ceramic. 32. Amorphous material comprising Al2O3, ZrO2, and a metal oxide other than Al2O3 or ZrO2, wherein at least a portion of the metal oxide other than Al2O3 or ZrO2 forms a distinct crystalline phase if the amorphous material is crystallized, wherein the amorphous material comprises at least 50 percent by weight collectively of the Al2O3 and the ZrO2, based on the total weight of the amorphous material, wherein the amorphous material contains not more than 20 percent by weight collectively As2O3, B 2O3, GeO2, P2O5, SiO2, TeO2, and V2O5, based on the total weight of the amorphous material, wherein the amorphous material has x, y, and z dimensions each perpendicular to each other, wherein each of the x, y, and z dimensions is at least 25 micrometers, and wherein the amorphous material does not have a Tg. 33. The amorphous material according to claim 32 comprising at least 35 percent by weight Al2O3, based on the total weight of the amorphous material. 34. The amorphous material according to claim 32 comprising Al2O3 in a range of about 55 to about 65 percent by weight to a range of about 45 to about 35 percent by weight ZrO2, based on the total Al2O3 and ZrO2 content of the amorphous material. 35. The amorphous material according to claim 32 wherein the metal oxide other than Al2O3 or ZrO2 is TiO 2. 36. Ceramic comprising the amorphous material according to claim 32. 37. The ceramic according to claim 32 wherein the amorphous material is glass. 38. A method for making amorphous material comprising Al 2O3, ZrO2, and a metal oxide other than Al 2O3 or ZrO2, wherein at least a portion of the metal oxide other than Al2O3 or ZrO2 forms a distinct crystalline phase if the amorphous muterial is crystallized, wherein the amorphous material comprises at least 50 percent by weight collectively of the Al2O3 and the ZrO2, based on the total weight of the amorphous material, wherein the amorphous material contains not more than 20 percent by weight collectively As 2O3, B2O3, GeO2, P2O 5, SiO2, TeO2, and V2O5, based on the total weight of the amorphous material, wherein the umorphous material has x, y, and z dimensions each perpendicular to each other, wherein each of the x, y, and z dimensions is at least 25 micrometers, and wherein the amorphous material does not have a Tg, the method comprising: melting sources of at least Al2O3, ZrO 2, and a metal oxide other than Al2 O3 or ZrO2 to provide a melt; cooling the melt to provide the amorphous material. 39. Amorphous material according to claim 1 in the form of an IR window. 40. Glass-ceramic according to claim 9 in the form of an IR window. 41. Amorphous material according to claim 32 in the form of an IR window.
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