Journal of Inorganic Materials

• Research Paper • Previous Articles     Next Articles

The Effect of TiO2 on the Properties of PTCR Ceramics Doped with Y2O3

WANG Yilin; YAO Yao; ZHAO Meiyn; ZHU Binghe   

  1. Shanghai Institute of Ceramics; Chinese Academy of Sciences Shanghai 200050 China
  • Received:1996-09-17 Revised:1996-11-05 Published:1997-10-20 Online:1997-10-20

Abstract: This paper discussed the effects of polymorphic form, purity and particle-size and agglomeration of TiO2 powders on microstructure and electric properties of PTCR ceramics based onY-doped BaTiO3. The results show that, microstructures of PTCR ceramics are influenced by polymorphic form, particle-size of the TiO2 powders. The semiconducting process of PTCR ceramics is also influenced by polymorphic form of TiO2. The impurity and agglomeration of raw materials will lead to degradation of PTC effect for the ceramics materials.

Key words: PTCR materials, TiO2 powders, polymorphic form, particle, agglomeration