Method of producing lithium aluminosilicate ceramics
US6764565B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 17, 2002 |
| Grant date | Jul 20, 2004 |
| Priority date | — |
| Expiry date | Dec 17, 2022 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC04B2235/9607
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A method of producing lithium aluminosilicate (LAS) ceramics, which uses a mixing powder of lithium carbonate, aluminum oxide, and silicon oxide as a raw material powder. After being mixed by ball milling and baked dry, the raw material powder is processed with a calcinations process such that the raw material powder becomes a precursor. The precursor is then pressed into the green ceramic. Significantly, the high heat conducting metal sheets are tightly attached above and below the surfaces of the ceramic during sinter and heat-treatment processes. A solid-state sinter process is performed with the green ceramic. Next, the ceramic is treated with a proper heat-treatment process. Since the top and bottom surfaces of the ceramic are capped with the high heat conducting metal, the ceramics are uniformly heated during all the heating processes. The ceramics of this invention exhibit more uniform properties and stable structure, which allow them to be used as temperature compensation components and athermal products.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.