Pb(Mg_<1/2>W_<1/2>)O_3Pb-(Ni_<1/3>Nb_<2/3>)O_3-PbTiO_3系低温焼結強誘電体材料の調製 : 合成・キャラクタリーゼーション

概要

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Dielectric properties in the Pb(Mg_<l/2>W_<l/2>)O_3-Pb(Ni_<1/3>Nb_<2/3>)O_3-PbTi_O_3 System strongly depended on the sample preparation conditions, when prepared by the conventional mixed oxide method. The dielectric properties were improved by the columbite method using MgWO_4 and NiNb_2O_6 as raw materials. The sintered ceramics prepared by the columbite precursor method showed a dielectric constant higher than 13000 at 20℃ and Y5U temperature dependence in the EIA characteristics. Microstructural analysis results indicated that specimens prepared by the columbite method were pure perovskite but that those prepared by the conventional method contained a large amount of Pb-W-O compound and unreacted MgO and NiO. The decrease in dielectric constant is attributed to the additional phases.
社団法人日本セラミックス協会の論文
1990-08-01