Dielectric ceramic and a capacitor using the same
US6356037B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 7, 1999 |
| Grant date | Mar 12, 2002 |
| Priority date | — |
| Expiry date | Apr 7, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01G4/1227
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An inexpensive capacitor for pulse generation whose characteristics do not deteriorate even when the capacitor is used in a high temperature, high vacuum, reducing atmosphere, and which enables generation of high-voltage pulses over a wide temperature range. The dielectric body 1 of the capacitor is constructed of a non-linear dielectric ceramic which exhibits resistance to reduction. The non-linear dielectric ceramic comprises a polycrystalline substance containing barium titanate as a primary component, and when the polycrystalline substance is represented by (1−a−b)ABO3+aM+bR wherein ABO3 is a barium titanate component and represents a perovskite structure, M is an oxide of at least one element selected from the group consisting of Mn, Ni and Co, R is an oxide of at least one element selected from the group consisting of La, Ce, Nd, Pr, Sm, Eu, Gd, Tb, Dy, Ho, Er and Yb, and a and b represent mole fractions; A, B, a, and b satisfy the following relationships: 1.000≦A/B≦1.006 (mole ratio), 0.3≦b/a≦3, 0.0015≦a≦0.0050, and 0.0015≦b≦0.0050, and a total content of M and R represented by Ad satisfies 0.3<Ad≦1.0 (wt. %).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.