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Structural-phase transition and electrical conductivity in tin-modified zirconium titanate |
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| Authors: | Yung Park Yoonho Kim Ho-Gi Kim |
| Institution: | a Department of Advanced Materials Engineering, Korea Advanced Institute of Science and Technology, P.O. Box 150, Cheongryang, Seoul, South Korea b Department of Ceramics, Korea Institute of Science and Technology, P.O. Box 131, Cheongryang, Seoul, South Korea c Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology, Kusong-dong, Yusong-gu, Taejon, South Korea |
| Abstract: | The structural phase transition in tin-modified zirconium titanate was investigated using high-temperature X-ray, DTA, DSC and electrical conductivity. In a dilute solid solution of Sn (x  0.2) in Zr1−xSnxTiO4, we ascribed to the successive phase transition from normal to incommensurate the break of electrical conductivity, thermal anomalies, and specific heat anomalies occurring at temperatures of 1121 °C, 1124 °C and 1125 °C on the heating run, and at temperatures of 1121 °C, 1116 °C and 1117 °C on the cooling run, respectively. Furthermore, the super-lattice reflection intensity was inversely proportional to the Sn content, cooling rate and electrical activation energy. With a composition of Zr0.8Sn0.2TiO4, the phase transition from normal to incommensurate was completely inhibited. |
| Keywords: | phase transitions Zirconium titanate Electrical conductivity |
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