3 ceramics were prepared by the conventional solid state reaction. The phases, microstructures and compositions of the prepared samples were characterized by X-ray diffractometer, scanning electron microscope and energy dispersive spectrometer, respectively, and the electrical parameters were measured. Results showed that the room temperature resistance of BaTiO3 could be effectively decreased by Y doping. However, the excessive Y would segregate at the grain boundary, which weakened the PTC effect of BaTiO3 ceramic, combined with Mn at the grain boundary. Through the coordinating behavior between grain and grain boundary, the PTC effect of BaTiO3 ceramic could be efficiently tailored."/>

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Coordinating Control of the PTC Effect on BaTiO3 Based Ceramic by Grain and Grain Boundary
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School of Advanced Materials and Nanotechnology,Xidian University,School of Advanced Materials and Nanotechnology,Xidian University,School of Advanced Materials and Nanotechnology,Xidian University,School of Advanced Materials and Nanotechnology,Xidian University,School of Advanced Materials and Nanotechnology,Xidian University,State Key Lab of Solidification Processing,Northwestern Polytechnical University

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    Abstract:

    Y and Mn co-doped BaTiO3 ceramics were prepared by the conventional solid state reaction. The phases, microstructures and compositions of the prepared samples were characterized by X-ray diffractometer, scanning electron microscope and energy dispersive spectrometer, respectively, and the electrical parameters were measured. Results showed that the room temperature resistance of BaTiO3 could be effectively decreased by Y doping. However, the excessive Y would segregate at the grain boundary, which weakened the PTC effect of BaTiO3 ceramic, combined with Mn at the grain boundary. Through the coordinating behavior between grain and grain boundary, the PTC effect of BaTiO3 ceramic could be efficiently tailored.

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[Li Zhimin, Ding Aiyu, Zhang Maolin, Yan Yangxi, Yang Zi, Luo Fa. Coordinating Control of the PTC Effect on BaTiO3 Based Ceramic by Grain and Grain Boundary[J]. Rare Metal Materials and Engineering,2018,47(8):2417~2421.]
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History
  • Received:September 15,2016
  • Revised:November 14,2016
  • Adopted:December 02,2016
  • Online: October 17,2018
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