Process for making LaMnO3-coated ceramics
AssigneeThe Boeing Company
InventorDarryl F. Garrigus
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Abstract
Processes are provided for forming composites comprising a LaMnO3 perovskite coatings (or a related perovskite) on a mat of ceramic particles (e.g., fibers, microballoons, or mixtures thereof) or LaMnO3-family sol-gel binders infused into the mat to form the connecting, rigidifying bridges.
Claims3
A process for sintering a ceramic selected from the group consisting of LaMnO3, LaCrO3, (La0.9Sr0.1) (Cr0.5Mn0.5) O3, and mixtures thereof to achieve perovskite crystal structure comprising the step of heating the ceramic with microwave pulses to a temperature between about 800-2400° F. (427-1316° C.) to sinter the ceramic.
A sintering process for preparing a perovskite ceramic, comprising the steps of:
- (a) coating a substrate with a sol containing precursors of the perovskite ceramic, the sol being susceptible to heating by absorbing microwave radiation;
- (b) exposing the coated substrate to microwave radiation for pulses of selected duration to sinter the sol to a perovskite ceramic by heating the coated substrate to a temperature above 800° F.
Dependencies are inferred from the claim text.