Claims
- 1. A process for the fabrication of coherently bonded bodies of a low temperature sintered ceramic material, for particular use as the dielectric bodies of capacitors, which comprises:
- forming green bodies of desired shape and size from a mixture of 100 parts by weight of Ba.sub.k-x M.sub.x O.sub.k TiO.sub.2 in finely divided form, where M is at least either of magnesium, zinc, strontium and calcium, where k is a numeral in the range of 1.00 to 1.04 and where x is a numeral in the range of 0.02 to 0.05, and 0.2 to 10.0 parts by weight of an additive in finely divided form composed of 30 to 90 mole percent boron oxide and 10 to 70 mole percent of at least one metal oxide selected from the group consisting of barium oxide, magnesium oxide, zinc oxide, strontium oxide, and calcium oxide for providing upon firing coherently bonded dielectric bodies with a specific dielectric constant in excess of 2000, dielectric losses of less than 2.5 percent, resistivity of over 1.times.10.sup.6 megohm-centimeters and capacitance temperature dependence of + or -10% in a temperature range of -25.degree. to +85.degree. C.;
- sintering the green bodies to maturity in a nonoxidative atmosphere at a temperature not to exceed 1300.degree. C.; and
- re-heating the sintered bodies in an oxidative atmosphere at a temperature lower than the preceding sintering temperature.
- 2. A process for the fabrication of coherently bonded bodies of a low temperature sintered ceramic material as set forth in claim 1, wherein the bodies are sintered in a temperature range of 1050.degree. to 1200.degree. C.
- 3. A process for the fabrication of coherently bonded bodies of a low temperature sintered ceramic material as set forth in claim 2, wherein the sintered bodies are reheated in a temperature range of 500.degree. to 1000.degree. C.
Priority Claims (1)
Number |
Date |
Country |
Kind |
58-225567 |
Nov 1983 |
JPX |
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Parent Case Info
This is a division of application Ser. No. 676,780, filed Nov. 30, 1984.
US Referenced Citations (7)
Foreign Referenced Citations (1)
Number |
Date |
Country |
55-67567 |
May 1980 |
JPX |
Divisions (1)
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Number |
Date |
Country |
Parent |
676780 |
Nov 1984 |
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