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


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).


Barium Titanate Positive Temperature Coefficient Chemical Step Calcium Citrate Amorphous Precursor 


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.


  1. 1.
    W. HEYWANG, Solid-State Electron. 3 (1961) 51.CrossRefGoogle Scholar
  2. 2.
    J. ILLINGSWORTH, H. M. AL-ALLAK, A. W. BRINKMAN and J. WOODS, J. Appl. Phys. 67 (1990) 2088.CrossRefGoogle Scholar
  3. 3.
    MEI-YU ZHAO and ZHU BING-HE, private communication.Google Scholar
  4. 4.
    V. RAVI and T. R. N. KUTTY, J. Am. Ceram. Soc. 75 (1992) 203.CrossRefGoogle Scholar
  5. 5.
    D. J. ANDERTON and F. R. SALE, Powder Metall. 1 (1979) 14.CrossRefGoogle Scholar
  6. 6.
    LUQIAN WANG, DONGSHENG HUANG and XINXIANG JIANG, Mater. Lett. 18 (1993) 159.CrossRefGoogle Scholar
  7. 7.
    C. LI, H. NI and Z. YIN, J. Chin. Ceram. Soc. 8 (1993) 44.Google Scholar
  8. 8.
    Idem., ibid. 10 (1982) 9.Google Scholar
  9. 9.
    QILAN CHEN, ibid. 9 (1994) 253.Google Scholar

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

Personalised recommendations