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The Synthesis of Ultrafine Ba/Sr Titanate Powders

Published online by Cambridge University Press:  25 February 2011

C.H. Lin ,
T.S. Yan  and
T.S. Chin
C.H. Lin
Affiliation:
Dept. of Materials Science, National Tsing Hua University, Hsin Chu, Taiwan
T.S. Yan
Affiliation:
Dept. of Materials Science, National Tsing Hua University, Hsin Chu, Taiwan
T.S. Chin
Affiliation:
Dept. of Materials Science, National Tsing Hua University, Hsin Chu, Taiwan
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Abstract

Ba/Sr titanate powders were obtained by reacting TiO2.xH2O gel in Ba(OH)2 and/or Sr(OH)2 aqueous solution. Different reaction temperatures between 68°C and 98°C and different mole ratios of Ba(OH)2 and Sr(OH)2 were used.

X-ray diffraction analysis showed that the titanate powders are cubic, and they are solid solutions of barium and strontium. The lattace spaces of the titanates are affected by the Ba(OH)g/ Sr(OH)g, mole ratio. TEM analysis showed that the titanate powders were spherical, ultrafine, and almost monodispersed. The particle size of the powders is about from 41 to 50 nm depending on the reaction temperature.

The titanate powders were compacted and sintered at various temperatures. The best sintering temperature of the powders is about 150°C lower than that of powders made by solid state sintering method.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 249: Symposium Q – Synthesis and Processing of Ceramics: Scientific Issues , 1991 , 101
Copyright
Copyright © Materials Research Society 1992

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References

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