Microstructures and Properties of BaTiO3-Ni Composite Dielectrics (高機能セラミック・デバイス<特集>)
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概要
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BaTiO<SUB>3</SUB>-Ni mixed powders were sintered at 1300°C in Ar and the microstructures and electric properties of sintered bodies were investigated with emphasis on the effects of particle size of starting powders. Ni particles dispersed better in BaTiO<SUB>3</SUB> matrix in BaTiO<SUB>3</SUB>(0.02μm)-Ni(4-7μm) system, in which the electric resistance was kept high at a large Ni content and the dielec-tric constant increased remarkably with increasing Ni content. On the other hand, Ni particles coalesced in BaTiO<SUB>3</SUB>(0.1μm)-Ni(4-7μm) systems at a small Ni content, resulting in a decrease in electric resistance. The significant growth of Ni particles was observed in BaTiO<SUB>3</SUB>(0.02μm)-Ni(0.02μm) system. It is concluded that the combination of coarse Ni and ultrafine BaTiO<SUB>3</SUB> particles is effective to produce the dielectric composites, because Ni particles are coated with finer BaTiO<SUB>3</SUB> powder on the mixing process.
- 社団法人 粉体粉末冶金協会の論文
著者
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HOJO Junichi
Dept.of Applied Chemistry,Faculty of Eng.,Kyushu Univ.
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Hojo Junichi
Dept.of Applied Chemistry Faculty Of Eng. Kyushu Univ.
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Emoto Hideyuki
Dept. Chem. Sci. & Tech., Fac. Eng., Kyushu Univ.
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Emoto Hideyuki
Dept. Chem. Sci. & Tech., Fac. Eng., Kyushu Univ.
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Hojo Junichi
Dept. Chem. Sci. & Tech., Fac. Eng., Kyushu Univ.
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