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Journal of Materials Science

, Volume 32, Issue 22, pp 6095–6099 | Cite as

Studies on the preparation of positive, temperature coefficient of resistivity powder by two chemical steps

  • Junming Xue
  • Chengen Li
  • Meiyu Zhao
  • Huanyao Ni
  • Zhiwen Yin
Article

Abstract

Ultrafine and homogeneous positive temperature coefficient of resistivity (PTCR) powder was prepared by two chemical steps: citrate and liquid-phase coating process. The physical and chemical properties of the powder were investigated in detail. The dimensions of the primary particles in the PTCR powders were about 20–50 nm. Sintering aids and acceptors could be distributed homogeneously in doped BaTiO3 powder through the liquid-phase coating process. Sintered from this powder produced samples with excellent PTCR effects (ΔR=106, ΔT=110°C, α30=26%°C-1).

Keywords

Barium Titanate Positive Temperature Coefficient Chemical Step Calcium Citrate Amorphous Precursor 

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Copyright information

© Chapman and Hall 1997

Authors and Affiliations

  • Junming Xue
    • 1
  • Chengen Li
  • Meiyu Zhao
  • Huanyao Ni
  • Zhiwen Yin
  1. 1.Shanghai Institute of CeramicsShanghaiPeople's Republic of China

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