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Formation Mechanisms of Perovskite Pb(Ni1/3Nb2/3)O3 in Reaction-sintering Process

Published online by Cambridge University Press:  01 February 2011

Yi-Cheng Liou ,
Yi-Chen Huang  and
Chi-Ting Wu
Yi-Cheng Liou
Affiliation:
Department of Electronic Engineering, Kun-Shan University of Technology, Tainan Hsien 710, Taiwan, R.O.C.
Yi-Chen Huang
Affiliation:
Department of Electronic Engineering, Kun-Shan University of Technology, Tainan Hsien 710, Taiwan, R.O.C.
Chi-Ting Wu
Affiliation:
Department of Electronic Engineering, Kun-Shan University of Technology, Tainan Hsien 710, Taiwan, R.O.C.
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Abstract

Formation mechanisms of perovskite Pb(Ni1/3Nb2/3)O3 (PNN) in the reaction-sintering process were investigated. Only the reflections of raw materials were detected at 400°C. For pellets heated to 500°C, pyrochlore phase Pb2Nb2O7 (P2N2) are found. Cubic Pb3Nb4O13 (P3N4) pyrochlore phase formed and became the main phase in pellets heated to 600°C. After being heated to 800°C, Pb3Nb2O8 (P3N2) pyrochlore phase formed in the pellets. As the pellets were heated to 900°C, the peak of NiNb2O6 columbite phase appeared. In pellets heated to 950°C, the weak peaks of PNN perovskite phase appeared. This means the perovskite phase formed at a temperature between 900°C and 950°C. As the pellets were heated to 1000°C, a large amount of PNN was formed and became dominant. The PbO, NiNb2O6 and Pb3Nb2O8 phases disappeared. The P3N4 content increased with temperature in pellets heated to 1050–1200°C. For pellets heated to 1250°C, the P3N4 content decreased significantly.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 848: Symposium FF – Solid-State Chemistry of Inorganic Materials V , 2004 , FF9.2
Copyright
Copyright © Materials Research Society 2005

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