2013 2nd International Conference on Materials Science and Technology, ICMST 2013
会议日期
April 11, 2013 - April 12, 2013
会议地点
Hong Kong, China
页码
78-83
中文摘要
Composite ceramics made of spinel structure NiMn2O4 and CaO-doped perovskite structure LaMnO3 were prepared by a conventional solid state reaction and sintered at different temperatures. The XRD patterns have shown that the major phases presented in the sintered samples are NiMn2O4 compounds with the spinel structure, La1-xCaxMnO3 with the perovskite structure and NiO with a monoclinic structure. SEM images show that the density and grain size of the composite ceramics increases with sintered temperature increasing. The electrical resistivity of the composite ceramics at 25 °C is found to change significantly depending on the CaO content, while the thermal constant B is still reasonably large in the range of 2400 to 3000 K. For the composition x = 0.1, the composite with a low electrical resistivity (ρ25 °C=4.46 ω · cm) and moderate B value (B25/50=2762K) was obtained. These composites could be applied as potential candidates for NTC thermistors in the suppression of the inrush current.
收录类别
EI
会议录出版地
Trans Tech Publications Ltd, Kreuzstrasse 10, Zurich-Durnten, CH-8635, Switzerland
ChangAi Min. Preparation and characterization of NTC NiMn2O4-La1-xCaxMnO3 (0&lex&le0.3) composite ceramics[C]. 见:2013 2nd International Conference on Materials Science and Technology, ICMST 2013. Hong Kong, China. April 11, 2013 - April 12, 2013.
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