Heat-resistant material for low-melting metal casting machine
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
C04B-035/03
C04B-035/14
C04B-035/16
C01B-033/24
C01B-033/08
출원번호
UP-0727646
(2007-03-27)
등록번호
US-7700061
(2010-05-20)
우선권정보
JP-P.2006-086401(2006-03-27)
발명자
/ 주소
Sakamoto, Akifumi
출원인 / 주소
Nichias Corporation
대리인 / 주소
Nixon & Vanderhye P.C.
인용정보
피인용 횟수 :
0인용 특허 :
4
초록
The present invention provides a heat-resistant material for a low-melting metal casting machine, which comprises calcium silicate and a fluoride.
대표청구항▼
What is claimed is: 1. A heat-resistant material for a low-melting metal casting machine, which comprises 88 to 99.95% by weight calcium silicate comprising at least one member selected from the group consisting of wollastonite (CaSiO3), tobermolite (5CaO.6SiO2.5H2O) and xonotlite (6CaO.6SiO2.H20)
What is claimed is: 1. A heat-resistant material for a low-melting metal casting machine, which comprises 88 to 99.95% by weight calcium silicate comprising at least one member selected from the group consisting of wollastonite (CaSiO3), tobermolite (5CaO.6SiO2.5H2O) and xonotlite (6CaO.6SiO2.H20) and of a fluoride which is at least one member selected from the group consisting of calcium fluoride (CaF2), magnesium fluoride (MgF2) and cryolite (Na3AlF6), the fluorine content of the composition is 0.1 to 4.0% by weight, wherein the heat-resistant material has a density of 200 to 2,500 kg/m3 and a bending strength of 1 to 20 MPa and wherein the material is produced by hydrothermal treatment to generate the calcium silicate. 2. The heat resistant material according to claim 1, wherein the fluoride has a particle size of 3 to 15 μm. 3. The heat resistant material according to claim 2, wherein the heat-resistant material further comprises a reinforcing fiber in an amount of 0.1 to 3% by weight. 4. The heat resistant material according to claim 3, having a density from 700 to 1,000 kg/m3 and a bending strength of from 6 to 12 MPa. 5. The heat resistant material according to claim 4, wherein the reinforcing fiber is carbon fiber and the heat-resistant material is produced by a process comprising a step of burning in a nitrogen atmosphere. 6. The heat resistant material according to claim 2, wherein the heat-resistant material is to be used at a site in contact with a molten metal of magnesium or a magnesium-containing alloy. 7. The heat resistant material according to claim 3, wherein the heat-resistant material is to be used at a site in contact with a molten metal of magnesium or a magnesium-containing alloy. 8. The heat resistant material according to claim 4, wherein the heat-resistant material is to be used at a site in contact with a molten metal of magnesium or a magnesium-containing alloy. 9. The heat resistant material according to claim 5, wherein the heat-resistant material is to be used at a site in contact with a molten metal of magnesium or a magnesium-containing alloy. 10. The heat resistant material according to claim 1, wherein the amount of calcium silicate is 92-99% by weight and the fluoride content is 1 to 8% by weight. 11. The heat resistant material according to claim 1, wherein the fluorine content is 0.5 to 3.0% by weight. 12. A heat-resistant material for a low-melting metal casting machine, which comprises 92 to 99% by weight calcium silicate comprising at least one member selected from the group consisting of wollastonite (CaSiO3), tobermolite (5CaO.6SiO2.5H2O) and xonotlite (6CaO.6SiO2.H20) and a fluoride having a particle size of 3 to 15 μm which is at least one member selected from the group consisting of calcium fluoride (CaF2), magnesium fluoride (MgF2) and cryolite (Na3AlF6), the fluorine content of the composition is 0.1 to 4.0% by weight, wherein the heat-resistant material has a density of 200 to 2,500 kg/m3 and a bending strength of 1 to 20 MPa and wherein the material is produced by hydrothermal treatment to generate the calcium silicate. 13. The heat resistant material according to claim 12, wherein the heat-resistant material further comprises a reinforcing fiber in an amount of 0.1 to 3% by weight. 14. The heat resistant material according to claim 13, having a density from 700 to 1,000 kg/m3 and a bending strength of from 6 to 12 MPa. 15. The heat resistant material according to claim 14, wherein the reinforcing fiber is carbon fiber and the heat-resistant material is produced by a process comprising a step of burning in a nitrogen atmosphere. 16. The heat resistant material according to claim 12, wherein the heat-resistant material is to be used at a site in contact with a molten metal of magnesium or a magnesium-containing alloy. 17. The heat resistant material according to claim 13, wherein the heat-resistant material is to be used at a site in contact with a molten metal of magnesium or a magnesium-containing alloy. 18. The heat resistant material according to claim 14, wherein the heat-resistant material is to be used at a site in contact with a molten metal of magnesium or a magnesium-containing alloy. 19. The heat resistant material according to claim 15, wherein the heat-resistant material is to be used at a site in contact with a molten metal of magnesium or a magnesium-containing alloy. 20. The heat resistant material according to claim 13, wherein the fluorine content is 0.5 to 3.0% by weight. 21. The heat resistant material according to claim 12, wherein the heat-resistant material further comprises a reinforcing fiber in an amount of 0.1 to 3% by weight. 22. The heat resistant material according to claim 21, having a density from 700 to 1,000 kg/m3 and a bending strength of from 6 to 12 MPa. 23. The heat resistant material according to claim 22, wherein the reinforcing fiber is carbon fiber and the heat-resistant material is produced by a process comprising a step of burning in a nitrogen atmosphere. 24. The heat resistant material according to claim 21, wherein the heat-resistant material is to be used at a site in contact with a molten metal of magnesium or a magnesium-containing alloy. 25. The heat resistant material according to claim 22, wherein the heat-resistant material is to be used at a site in contact with a molten metal of magnesium or a magnesium-containing alloy. 26. The heat resistant material according to claim 23, wherein the heat-resistant material is to be used at a site in contact with a molten metal of magnesium or a magnesium-containing alloy.
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