Compositions: ceramic – Ceramic compositions – Yttrium – lanthanide – actinide – or transactinide containing
Patent
1998-10-16
2000-04-25
Kopec, Mark
Compositions: ceramic
Ceramic compositions
Yttrium, lanthanide, actinide, or transactinide containing
501126, 2525211, 2525212, 338225D, 331107R, 331158, H01B 108, C04B 3550, H01C 710, H03B 512
Patent
active
060544031
ABSTRACT:
A semiconductive ceramic in which the B constant is maintained at about 4000 K or more at elevated temperature to thereby decrease power consumption, and the B constant is lowered less than 4000 K at low temperature so as to avoid unnecessary increase of resistance; as well as a semiconductive ceramic element using the same. The semiconductive ceramic is formed of a lanthanum cobalt oxide, which serves as the primary component, and, as a secondary component, at least one oxide of Li, Na, K, Rb, Cs, Be, Mg, Ca, Sr, Ba, Ni, Cu and Zn. The semiconductive ceramic element is fabricated through use of the semiconductive ceramic and an electrode formed thereon.
REFERENCES:
patent: 5703000 (1997-12-01), Nakayama et al.
patent: 5858902 (1999-01-01), Ishikawa et al.
"Magnetic and Electrical Properties of Cu Substituted La.sub.1-x Ca.sub.x CoO.sub.3 Crystals"; Journal of Magnetism and Magnetic Materials; Ch. Zock, et al.; 150 (1995) Oct., No. 2, Amsterdam, NL; pp. 253-262.
"Magnetoresistance in La.sub.1-x Sr.sub.x CoO.sub.3 for O.05 .ltoreq. .chi. .ltoreq. 0.25"; The American Physical Society; Vladimir Golovanov, et al.; Apr. 1, 1996 I; pp. 8207-8210.
"Synthesis of (La,Sr)CoO.sub.3 Perovskite Films via a Sol-gel Route and Their Physicochemical and Electrochemical Surface Characterization for Anode Application in Alkaline Water Electrolysis"; J. Chem. Soc., Faraday Trans.; Ravidra N.Singh, et al.; 1996, 92(14); pp. 2593-2598.
Ishikawa Terunobu
Kawase Yoichi
Nakayama Akinori
Niimi Hideaki
Ueno Satoshi
Kopec Mark
Murata Manufacturing Co. Ltd.
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