초록 ▼

A process of making aluminum oxynitride powder including the steps of: forming a powder mixture by mixing alumina powder and aluminum nitride powder according to the following formula: ((4-x)/3) alumina and x aluminum nitride wherein x is in mole percent and ranges between about 0.31 and about 0.61;

A process of making aluminum oxynitride powder including the steps of: forming a powder mixture by mixing alumina powder and aluminum nitride powder according to the following formula: ((4-x)/3) alumina and x aluminum nitride wherein x is in mole percent and ranges between about 0.31 and about 0.61; adding between about 0.1 mole percent and about 1.0 mole percent of pure aluminum powder to the powder mixture; and reacting the powder mixture containing aluminum at a temperature between about 1600째 C. and about 1900째 C. for a duration between about 2 hours and about 24 hours in a flowing nitrogen atmosphere so as to form aluminum oxynitride.

대표청구항 ▼

What is claimed is: 1. A process of making aluminum oxynitride powder comprising the steps of: forming a powder mixture by mixing alumina powder and aluminum nitride powder according to the following formula: ((4-x)/3) alumina and x aluminum nitride wherein x is in mole percent and ranges between a

What is claimed is: 1. A process of making aluminum oxynitride powder comprising the steps of: forming a powder mixture by mixing alumina powder and aluminum nitride powder according to the following formula: ((4-x)/3) alumina and x aluminum nitride wherein x is in mole percent and ranges between about 0.31 and about 0.61; adding between about 0.1 mole percent and about 1.0 mole percent of pure aluminum powder to the powder mixture; and reacting the powder mixture containing aluminum at a temperature between about 1600째 C. and about 1900째 C. for a duration between about 2 hours and about 24 hours in a flowing nitrogen atmosphere so as to form aluminum oxynitride. 2. The process of claim 1 wherein the aluminum oxynitride has the formula: Al(8+x)/3O4-xNx. 3. The process of claim 1 wherein the pure aluminum powder added to the powder mixture ranges between about 0.1 to about 0.2 mole percent. 4. The process of claim 1 wherein the aluminum oxynitride contains less than or equal to about 0.1 weight percent aluminum nitride. 5. The process of claim 1 wherein x equals about 0.35. 6. The process of claim 5 wherein the pure aluminum powder added to the powder mixture ranges between about 0.1 to about 0.2 mole percent.