Low thermal expansion and high rigidity ceramic sintered body
US6372677B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 5, 2000 |
| Grant date | Apr 16, 2002 |
| Priority date | — |
| Expiry date | Dec 5, 2020 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC04B35/195
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
The low thermal expansion and high rigidity ceramic sintered body of this invention is characterized by assuming as a crystal structure a hexagonal close-packed structure and substantially comprising solid solution crystal grains represented by the formula: MgaLibFecAldSieOf (wherein a is in the range of 1.8 to 1.9, b is in the range of 0.1 to 0.3, c is in the range of 0 to 0.2, d is in the range of 3.9 to 4.1, e is in the range of 6.0 to 7.0, and f is in the range of 19 to 23). It is further characterized by the solid solution crystal grains having lattice constants in the ranges, a0 in the range of 9.774 to 9.804 å and c0 in the range of 9.286 to 9.330 å, the relative density of the sintered body being of not less than 98%.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.