Microstructure-PTCR property relationships in PbTiO3-TiO2 ceramics.
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概要
- 論文の詳細を見る
Niobium doped PbTiO3–TiO2 ceramics show PTCR properties at the Curie temperature of PbTiO3 (490°C). This paper describes the relationships between PTCR characteristics and the microstructure of PbTiO3–TiO2 ceramics. PTCR properties depend on the firing conditions that vary the microstructure of PbTiO3–TiO2 ceramics. The PTCR properties disappear when TiO2 grains are connected each other from one end of the sample to the other. The resistivity–temperature characteristics of the interface between PbTiO3 and TiO2 grains are directly measured. It is found that PTCR characteristics are originated at the interface between PbTiO3 and TiO2 grains. On the basis of this idea, a new type of PTCR PbTiO3–TiO2 ceramics with the boundary layer structure is proposed.
- The Iron and Steel Institute of Japanの論文
著者
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Homma Motofumi
Department Of Material Science Grauate School Of Engineering Tohoku University
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Iijima Takashi
Tohoku National Industrial Research Institute
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OKADA Masuo
Department of Material Science, Graduate School of Engineering, Tohoku University
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Homma Motofumi
Departments of Materials Science, Faculty of Engineering, Tohoku University
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Okada Masuo
Departments of Materials Science, Faculty of Engineering, Tohoku University
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