Dielectric and non-magnetic ceramic for high frequency applications
US4159961A · kind A · utility
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11Claims
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Key dates
| Filing date | Nov 4, 1976 |
| Grant date | Jul 3, 1979 |
| Priority date | — |
| Expiry date | Nov 4, 1996 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01B3/12
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Dielectrics without any residual magnetization, produced by the technique of ceramics sintered at high temperatures, usable in devices operating at very high frequencies, such as X band. They are obtained by sintering at lower temperatures than for known dielectrics suitable for those applications and correspond to two possible general formulae: EQU Y.sub.3-x-z Ca.sub.x+z Zr.sub.x Fe.sub.5-x-y-z Al.sub.y Me.sub.z O.sub.12 where: EQU Me= Ge, Si or Ti; PA1 x is of the order of 2 PA1 0.ltoreq. y.ltoreq. 2 PA1 0.ltoreq. z.ltoreq. 1 And (1+ Y)Li.sub. 2 O; 2xZnO; (2x+ 4y)TiO.sub.2 with: 1- 0.4x- 0.6y= 0.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.