Doped ceramic materials and methods of forming the same
OwnerLeong Lim, Ping Liuinventors
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Abstract
A doped ceramic material comprising: a first layer comprising ceramic material and an amount of dopant, a second layer comprising the ceramic material, and a transitional layer connecting the first layer and the second layer. The transitional layer comprises the dopant in an amount which decreases in a direction from the first layer to the second layer. A method of forming the doped ceramic material is also disclosed.
Claims37
A doped ceramic material comprising:
- (a) a first layer comprising ceramic material and an amount of dopant,
- (b) a second layer comprising the ceramic material, and
- (c) a transitional layer connecting the first layer and the second layer, said transitional layer comprising the dopant in an amount which decreases in a direction from the first layer to the second layer.
A method of forming a doped ceramic material comprising the steps of:
- (a) providing a high sinterability ceramic preform having a first layer, a second layer and a transitional layer connecting the first layer and the second layer;
- (b) doping the first layer of the ceramic preform with an amount of dopant to thereby cause the amount of dopant in said transitional layer to decrease in a direction from the first layer to the second;
- and
- (c) sintering the ceramic preform at a temperature for a period of time to form the doped ceramic material.
A chromium oxide (Cr2O3) doped alumina (Al2O3) material comprising:
- (a) a first layer comprising Al2O3 and an amount of Cr2O3,
- (b) a second layer comprising Al2O3, and
- (c) a transitional layer connecting the first layer and the second layer, said transitional layer comprising Cr2O3 in an amount which decreases in a direction from the first layer to the second layer.
A method of forming Chromium Oxide (Cr2O3) doped alumina (Al2O3) material comprising the steps of:
- (a) providing a high sinterability Al2O3 preform having a first layer, a second layer and a transitional layer connecting the first layer and the second layer;
- (b) doping the first layer with an amount of Cr2O3 to thereby cause the amount of Cr2O3 in said transitional layer to decrease in a direction from the first layer to the second;
- and
- (c) sintering the Al2O3 preform at a temperature for a period of time to form the Cr2O3 doped Al2O3 material.
Dependencies are inferred from the claim text.