Piezoelectric glass ceramic compositions and piezoelectric devices made therefrom
US9255033B2 · kind B2 · utility
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27Claims
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Key dates
| Filing date | Aug 16, 2013 |
| Grant date | Feb 9, 2016 |
| Priority date | — |
| Expiry date | Jan 25, 2034 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC04B2235/785
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A piezoelectric glass ceramic represented by the formula(M1Ox)-(M2Oy)—SiO2 wherein M1 is one or more metals and/or metalloids, M2 is one or more metals and/or metalloids, x is a value equal to the valence of M1, and y is a value equal to the valence of M2. The piezoelectric glass ceramic has a total alkali metal concentration of less than about 1000 parts per million by weight (ppmw). A process of preparing a piezoelectric glass ceramic and a piezoelectric glass ceramic body prepared therefrom.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.