Tosoh Corporation

Hiroshi Yamamura

Hiroya Nagata

Toshiyuki Mori

Naomichi Sakai

Yoshitaka Kubota

Hideto Kuramochi

Takaaki Tsukidate

Kiyoshi Kasai

Naoki Kosugi

Tomoyuki Oikawa

Takashi Mitamura

Hidehiko Kobayashi

Masanaga Kikusawa

Hirokuni Hoshino

Hiroshi Asakura

Kenji Uchino

A defective fluorite structure type solid electrolyte of the following formula (1):

Fluorite structure type ceria type solid electrolyte

A method for preparing zircon powder, which comprises mixing (1) silica sol and (2) an aqueous zirconium oxychloride solution having a concentration which would be from 0.1 to 2 mols/l after mixed with the silica sol, in a SiO.sub.2 /ZrO.sub.2 molar ratio of from 0.95 to 1.10, heating the mixture to hydrolyze the zirconium oxychloride, followed by dehydration treatment to obtain a powder, heating the powder from room temperature to a calcination temperature over a period of from 0.7 to 30 hours and calcining the powder at a temperature of from 1,200.degree. to 1,400.degree. C. for a period of time satisfying the relation of:

Method for preparing zircon powder

A pollucite powder consisting essentially of a pollucite phase and having an Al.sub.2 O.sub.3 /SiO.sub.2 molar ratio of from 0.21 to 0.25 and a Cs.sub.2 O/SiO.sub.2 molar ratio of from 0.19 to 0.22.

Pollucite crystalline powders with low thermal expansion coefficients

A laminated silicon oxide film capacitor including a conductive or semiconductive silicon substrate and, formed on the substrate surface, at least one laminated film comprising a silicon oxide layer and an electrode layer laminated one on the other, and electrodes.

Laminated silicon oxide film capacitors and method for their production

A method of producing powder of lithium zirconate is disclosed, in which a gel-like zirconium compound obtained by hydrolyzing or neutralizing an aqueous solution of a zirconium salt is mixed with an aqueous solution of a lithium salt and the mixture is dehydrated, temporarily burned and pulverized.

Method of producing powder of lithium zirconate

An actuator of the present invention is composed of a monomorph-type piezoelectric ceramic. The monomorph-type piezoelectric ceramic is a BaTiO.sub.3 -based ceramic, a PZT based ceramic having Nb, Sb, La, Mn, Nd and Bi, BaTiO.sub.3 --SrTiO.sub.3 -based ceramic containing SrTiO.sub.3 by 20 to 35 mole %, K(Nb, Ta)O.sub.3 -based ceramic, or a ceramic represented by a general formula: [Pb, (A.sub.1/2 B.sub.1/2)](Zr.sub.1-n, Cn)O.sub.3 where A is a monovalent element such as Li, Na, K, Rb, Cs or the like, B is a trivalent element such as Bi, La, Y, Sb, Ga or the like, A and B being both replaceable solid-meltable elements for Pb, C is an element such as Ti, Sn or the like that is a replaceable solid-meltable element for Zr, and n is from 0 to 0.8.

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Yokohama, Japan

Hiroshi Yamamura