Plastic and nonmetallic article shaping or treating: processes – Including step of generating heat by friction
Patent
1979-10-30
1981-03-03
Arnold, Donald J.
Plastic and nonmetallic article shaping or treating: processes
Including step of generating heat by friction
29612, 252518, 252521, 264 65, 264 66, 264 85, H01C 702, C04B 3334
Patent
active
042540704
ABSTRACT:
A sintered body of a ceramic composition for voltage non-linear resistor is produced by sintering an oxide semiconductor composition comprising a main component of zinc oxide and a minor component at 1100.degree. to 1400.degree. C.; then maintaining the sintered body in an inert gas such as N.sub.2, Ar and so on having an oxygen content of 0.1 to 21 vol. % at the temperature lower than the sintering temperature for a specific time; changing the atmosphere into an inert gas having an oxygen content of lower than 0.02 vol. % at 800.degree. to 1200.degree. C.; and cooling it.
REFERENCES:
patent: 3000828 (1961-09-01), Buckley et al.
patent: 3585261 (1971-06-01), Baba
patent: 3903226 (1975-09-01), Iga et al.
patent: 3953371 (1976-04-01), May
patent: 4094061 (1978-06-01), Gupta et al.
patent: 4142996 (1979-03-01), Wong et al.
Morisawa Matsuo
Okutani Katsunobu
Yamamoto Takashi
Yodogawa Masatada
Arnold Donald J.
TDK Electronics Company Limited
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