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Please use this identifier to cite or link to this item: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/40426

Title: V-shaped Positive Temperature Coefficient of Resistivity Characteristics of Microwave Sintered (Sr 0.4 Pb 0.6 )TiO 3
Authors: Horng-Yi Chang;K. S. Liu;H. W. Chen;J. T. Tan
Contributors: 國立臺灣海洋大學:輪機工程學系
Date: 1995-12
Issue Date: 2017-01-18T08:47:56Z
Publisher: Materials Chemistry and Physics
Abstract: Abstract:The resistivity-temperature (ϱ-T) characteristics of the (Sr0.4Pb0.6)TiO3 materials prepared by the microwave sintering process were examined. The resistivities varied insignificantly with sintering temperature (1000–1100 °C) and soaking time (10–30 min), but increased markedly as the cooling rate reduced or as the heat-treatment temperature increased. The Curie temperature was not altered by the cooling rate control process but was shifted from Tc = 302 to 210 °C when the as-sintered samples were post-heat-treated at 1100 °C for 1 h. The high Curie temperature of the as-sintered samples was proposed to result from the core-shell structure of the grains. The ‘shell’, which contained Pb-rich perovskite of composition (Sr0.29Pb0.71)TiO3, was homogenized with the ‘core’ during heat treatment such that the Curie temperature approached Tc = 210 °C, as the composition of the ‘shell’ reduced to the designed value, (Sr0.4Pb0.6)TiO3.
Relation: 42(4), pp.258-263
URI: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/40426
Appears in Collections:[輪機工程學系] 期刊論文

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