Yttrium oxyfluoride, starting material powder for production of stabilized yttrium oxyfluoride, and method for producing stabilized yttrium oxyfluoride
US10280091B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 29, 2016 |
| Grant date | May 7, 2019 |
| Priority date | — |
| Expiry date | Mar 29, 2036 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC04B2235/81
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
An yttrium oxyfluoride is represented by YOF and is stabilized by a fluoride represented by CaF2. Preferably, the number of moles of Ca with respect to 100 mol of yttrium is from 8 to 40 mol. A powder material is made of a first powder mixture including a calcium fluoride powder represented by CaF2 and an yttrium oxyfluoride powder represented by YOF, or a second powder mixture including a calcium fluoride powder represented by CaF2, an yttrium fluoride powder represented by YF3, and an yttrium oxide powder represented by Y2O3. A production method involves firing a molded product of the first or second powder mixture under predetermined conditions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.