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US 4,098,725 AGranted
Low thermal expansive, electroconductive composite ceramics
AssigneeTokyo Denki Kagaku Kogyo Kabushiki Kaisha
InventorsHirotaka Yamamoto, Hideaki Ninomiya, Makoto Kobayashi
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Abstract
Low thermally expansive, electroconductive composite sintered ceramics comprised of a phase of at least one ceramics selected from the group consisting of low thermally expansive ceramics and negatively thermally expansive ceramics, having dispersed thereinto substantially in a continuous state a phase of an electroconductive substance such as a metal.
Claims1
A low thermally expansive, electroconductive composite sintered ceramic comprising a phase of at least one ceramic selected from the group consisting of
- (a) low thermally expansive ceramics selected from the group consisting of spodumene series ceramics, eucryptite series ceramics, aluminium titanate series ceramics, cordierite series ceramics, mullite series ceramics and zircon series ceramics having a thermal expansion coefficient of about 5 .times. 10.sup.-6 /degree or less and
- (b) negatively thermally expansive ceramics selected from the group consisting of eucryptite series ceramics and aluminium titanate ceramics and
- said sintered ceramic having dispersed therein at least 10% by volume of a phase of NiFe.sub.2 O.sub.4 substantially in a continuous state.
Dependencies are inferred from the claim text.