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Home  >  Journal list  >  MATERIALS TRANSACTIONS  >  Vol.42  No.8 (2001)  >  pp.1823-1826

MATERIALS TRANSACTIONS
<<Previous article Vol.42  No.8 (2001)   pp.1823 - 1826 Next article>>

Phase Relationship in a BaO-Bi2O3-TiO2 System and Electrical Properties of BaTiO3 with Addition of Bi4Ti3O12

Takaya Akashi1), Kouji Morita1), Toshio Hirai1), Hisanori Yamane2) and Takashi Goto1)
1) Institute for Materials Research, Tohoku University
2) Institute of Multidisciplinary Research for Advanced Materials, Tohoku University


A phase relationship of the BaO–Bi2O3–TiO2 system at 1273 K was studied using a solid state reaction. A new compound of BaBi6Ti20O50 was found in this ternary system. In the BaTiO3–Bi4Ti3O12 pseudo-binary system, the solid solution of Bi4Ti3O12 into BaTiO3 was observed up to 4 mol%  Bi4Ti3O12. The lattice parameters of tetragonal BaTiO3 varied depending on Bi4Ti3O12 content in the solid solution range. The structure of BaTiO3 became cubic with the addition of more than 4 mol%  Bi4Ti3O12. The temperature dependence of permittivity obeyed the Curie-Weiss-like behavior in the solid solution range. The highest permittivity of BaTiO3 decreased and the peak of permittivity became broader with increasing Bi4Ti3O12 content.


Keyword:
BaTiO3, Bi4Ti3O12-doped BaTiO3, BaBi6Ti20O50, phase relationship, solid solution, permittivity, electrical conductivity

Received: May 22, 2001
Accepted: June 22, 2001 , Published online: September 06, 2005
Copyright (c) 2005 The Japan Institute of Metals

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