CERAMIC MATERIAL BASED ON BISMUTH NIOBATE SUBSTITUTED WITH ZINC

WIPO Patent Application WO/2002/008148

A1

The invention relates to ceramic materials based on bismuth niobate substituted with zinc and can be used for producing multilayer high frequency thermostable ceramic condensers provided with electrodes based on an alloy which comprises Ag and Pd, and also for producing multilayer microwave films. The aim of the invention is to develop a ceramic material having a low sintering temperature sufficient for using silver-vanadium electrodes having a silver content of up to 90 %. Said material has an optimum dielectric permeability and thermostability which are sufficient for producing a wide range of items based on said material. Zinc niobate ZnNb¿2?O¿6? having a structure of columbite with a quantity ranging from 7.0 to 99.0, expressed in mass %, is added into a ceramic material based on the bismuth niobate substituted with zinc having a crystal-chemical formula (Bi ¿2/3? [ ] ¿1/3?)2(Zn ?2+¿ ¿1/3? Nd ¿2/3?)¿2? O¿6? [ ]1, [ ] being a vacancy with a pyrochlore structure. Glass having the following component ratio, in mass %, can be added into the material: PbO ranging from 26 to 33, Bi¿2? ranging from 14 to 24, B¿2?O¿3? ranging from 4 to 10, TiO¿2? ranging from 15 to 21, ZnO ranging from 21 to 28.

KARTENKO NELLI FEDOROVNA (RU)

PCT/RU2001/000287

January 31, 2002

July 05, 2001

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NENASHEVA ELIZAVETA ARKADIEVNA (RU)
KARTENKO NELLI FEDOROVNA (RU)

C04B35/00; C04B35/453; C04B35/495; H01G4/12; (IPC1-7): C04B35/495; C04B35/00; C04B35/453; H01G4/12

RU2021207C1	1994-10-15
RU2035780C1	1995-05-20
EP0044076A1	1982-01-20
EP0717018A1	1996-06-19
EP0411757A2	1991-02-06

Sandigursky, Oleg Lvovich (RU)

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