Ferroelectric ceramic material

专利名称：Ferroelectric ceramic material

发明人：Ushida, Yoshihisa Mitsui Petrochemical Ind.,

Ltd.,Hirai, Nobuki Mitsui Petrochemical Ind.,Ltd.,Mase, Hiroshi Mitsui Petrochemical Ind.,Ltd.

申请号：EP305332.2申请日：190525公开号：EP0344978B1公开日：19921223

摘要：Proposed are ferroelectric ceramic materials which are Perovskite solidsolutions comprising a solid solution of formula Pb1 - aMa (Mg1/3 Nb2/3) x Tiy Zrz O3wherein M is Ba or Sr, x + y + z is 1, a is from 0 to 0.10, x is from 0.05 to 0.70, y is from 0.25to 0.50 and z is from 0.05 to 0.70, which solid solution contains either (i) at least one oxideselected from La2O3, Bi2O3 and Nd2O3 as group A oxide and at least one oxide selectedfrom NiO, Fe2O3, SnO2 and Ta2O5 as group B oxide, with the proviso that NiO or Fe2O3 isnecessarily contained, or (ii) MnO2, at least one said group A oxide and at least one oxideselected from NiO, ZnO, Fe2O3, SnO2 and Ta2O5 as group B oxide, with the proviso thatNiO, Fe2O3 or Ta2O5 is necessarily contained. These ferroelectric ceramic materials havea large piezoelectric strain constant d.

申请人：MITSUI PETROCHEMICAL INDUSTRIES, LTD.

地址：2-5, KASUMIGASEKI 3-CHOME CHIYODA-KU; TOKYO 100

代理机构：Myerscough, Philip Boyd

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