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US 12,077,478 B2Granted
Cold sintering ceramics and composites
AssigneeThe Penn State Research Foundation
InventorsClive A. Randall, Jing Guo, Amanda Baker, Michael Lanagan, Hanzheng Guo
Life of this patent
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Abstract
Cold sintering of materials includes using a process of combining at least one inorganic compound, e.g., ceramic, in particle form with a solvent that can partially solubilize the inorganic compound to form a mixture; and applying pressure and a low temperature to the mixture to evaporate the solvent and densify the at least one inorganic compound to form sintered materials.
Claims19
A material, comprising:
- at least one inorganic compound and at least one polymeric material such that the at least one inorganic material is less than 100 volume percent (vol %) and no more than 70 vol % of the material and the at least one polymeric material is greater than 0 vol % and less than or equal to 30 vol % of the material;
- the material being a sintered material formed via a sintering process comprising:
- combining the at least one inorganic compound and the at least one polymeric material with a solvent to form a mixture;
- and
- applying pressure and heat to the mixture to evaporate the solvent and densify the at least one inorganic compound and the at least one polymeric material, wherein the applied heat is at a temperature of no more than 200° C. above the boiling point of the solvent, and wherein the material is densified to a relative density of greater than 80% and wherein the sintered material has the at least one polymeric material in contact with a grain boundary of the sintered material.
2 more elements
A material, comprising:
- a ceramic with at least one polymeric material deposited on a substrate, the ceramic with at least one polymeric material deposited on the substrate via a sintering process comprising:
- depositing the ceramic and the at least one polymeric material on the substrate;
- exposing the ceramic and the at least one polymeric material deposited on the substrate to a solvent to form a wetted deposited ceramic;
- and
- applying pressure and heat to the wetted deposited ceramic to evaporate the solvent and sinter the ceramic and the at least one polymeric material on the substrate, wherein the applied heat is no more than 200° C., the applied pressure is no more than 5,000 MPa and the ceramic is sintered to a relative density of no less than 85%.
2 more elements
A device comprising:
- a sintered material, the sintered material comprising one of:
- (a) at least one inorganic compound and at least one polymeric material such that the at least one inorganic material is less than 100 volume percent (vol %) and no more than 70 vol % of the material and the at least one polymeric material is greater than 0 vol % and less than or equal to 30 vol % of the material, the sintered material being formed via a sintering process comprising:
- combining the at least one inorganic compound and the at least one polymeric material with a solvent to form a mixture;
- and
- applying pressure and heat to the mixture to evaporate the solvent and densify the at least one inorganic compound and the at least one polymeric material to form the material, wherein the applied heat is at a temperature of no more than 200° C. above the boiling point of the solvent, and wherein the material is densified to a relative density of greater than 80%, and
- wherein the sintered material has the at least one polymeric material in contact with a grain boundary of the sintered material;
- and
- (b) a ceramic with at least one polymeric material deposited on a substrate, the ceramic with the at least one polymeric material deposited on the substrate via a sintering process comprising:
- depositing the ceramic with the at least one polymeric material on the substrate;
- exposing the ceramic with the at least one polymeric material deposited on the substrate to a solvent to form a wetted deposited ceramic;
- and
- applying pressure and heat to the wetted deposited ceramic to evaporate the solvent and sinter the ceramic and the at least one polymeric material on the substrate, wherein the applied heat is no more than 200° C., the applied pressure is no more than 5,000 MPa and the ceramic is sintered to a relative density of no less than 85%;
- and
- wherein the sintered material has the at least one polymeric material in contact with a grain boundary of the sintered material.
11 more elements
Dependencies are inferred from the claim text.