Sintered body having non-linear resistance characteristics
US6184771A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 24, 1999 |
| Grant date | Feb 6, 2001 |
| Priority date | — |
| Expiry date | May 24, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01C7/112
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A sintered body which can be formed into a resistor having a non-linear resistance includes zinc oxide is the principal composition and bismuth, cobalt, antimony, manganese and nickel respectively converted to expressed Bi.sub.2 O.sub.3, Co.sub.2 O.sub.3, Sb.sub.2 O.sub.3, MnO and NiO as auxiliary compositions. The compositions contains 0.05 to 10 mol % of Bi.sub.2 O.sub.3, 0.05 to 10 mol % of Co.sub.2 O.sub.3, 0.05 to 10 mol % of Sb.sub.2 O.sub.3, 0.05 to 10 mol % of MnO and 0.05 to 10 mol % of NiO; the content ratio of the Bi.sub.2 O.sub.3 to the NiO is in a mole ratio of 0.5 or more but 1.5 or less, and the content ratio of the MnO to the Sb.sub.2 O.sub.3 is in a mole ratio of 1.0 or less. Preferably, the composition contains at least one of 0.5 to 500 ppm of aluminum, converted to Al.sup.3+, and 10 to 1000 ppm of at least one or the other of boron and silver, converted respectively to B.sup.3+, and Ag.sup.+. The composition may also contain 0.01 to 1000 ppm of at least one of sodium, potassium, chlorine and calcium, converted respectively to Na.sup.+, K.sup.+, Cl.sup.- and Ca.sup.2+.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.