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Journal of Materials Research Journal of Materials Research

Article contents

Fabrication of undoped near-monophase Ba2Ti9O20 via rapid thermal processing

Published online by Cambridge University Press:  31 January 2011

Wen-yi Lin  and
Robert F. Speyer
Wen-yi Lin
Affiliation:
School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332–0245
Robert F. Speyer
Affiliation:
School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332–0245
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Abstract

Rapid thermal processing of BaTiO3 and TiO2 pressed powders at 500 °C/min to 1250 °C for 2 h in an infrared furnace resulted in a mixture of Ba2Ti9O20, BaTi4O9, and TiO2. Further heat treatment at 1390 °C led to 96 vol% phase-pure Ba2Ti9O20 from an initial mixture devoid of any dopant. Heat treatment at rates decreasing to 5 °C/min facilitated agglomeration of TiO2. This, in turn, increased the diffusion distance required for reaction of BaTi4O9 and TiO2 to form Ba2Ti9O20.

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Articles
Information
Journal of Materials Research , Volume 14 , Issue 5 , May 1999 , pp. 1939 - 1943
Copyright
Copyright © Materials Research Society 1999

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