Compositions: ceramic – Ceramic compositions – Titanate – zirconate – stannate – niobate – or tantalate or...
Patent
1991-06-13
1992-11-17
Group, Karl
Compositions: ceramic
Ceramic compositions
Titanate, zirconate, stannate, niobate, or tantalate or...
501152, 252 6259, C04B 3546
Patent
active
051643499
ABSTRACT:
An electromagnetic effect material comprising xA-yB-zC-wD-.alpha.0 series oxide ceramics, in which A and B represent one or more of element selected from the combination of elements represented by the general formula ABO.sub.3 and capable of forming a perovskite structure material exhibiting a ferromagnetic or antiferromagnetic property, C and D represent one or more of elements selected from the combination of elements represented by the general formula CDO.sub.3 and capable of forming a perovskite structure material exhibiting a ferroelectric, antiferroelectric or piezo-electric effect, with a proviso of excluding a case in which A and C are identical and B and D are identical to each other and a case in which A is Bi and B is Fe, x, y, z and w represent the ratio for the elements A, B, C and D, respectively, x+y+z+w=1, 0.01<x<0.95, 0.01<y< 0.95, 0.01<z<0.95, 0.01<w<0.95 and .alpha. represents a number of oxygen atoms capable of satisfying atomic valence of other elements, and having a temperature region in which the electromagnetic bonding coefficient is greater than 1.0.times.10.sup.-5 (emu cm/V g) within a temperature range from 250 to 700K.
REFERENCES:
patent: 4978646 (1990-12-01), Bardhan et al.
Magnetic Properties of Glassy Sputtered Films of the Bi.sub.2 O.sub.3 -Fe.sub.2 O.sub.3 -ABO.sub.2 System ABO.sub.3 : PbTiO.sub.3 BaTio.sub.3 MAG-89-117.
Magnetic and Dietectric Properties of the Bi.sub.2 O.sub.3 -Fe.sub.2 O.sub.3 -PbTiO.sub.3 System Thin Files MAG-89-193.
Fujii Toshitaka
Kajima Atsushi
Ohdan Kyoji
Okamoto Iwao
Sugise Ryoji
Gallo Chris
Group Karl
UBE Industries Ltd.
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