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January 25th, 2010

Single-Calcination Synthesis of Pyrochlore Free Pb(Mg1/3Nb2/3)O3 Powders Using Particle-Coating Method

Published on January 25th, 2010 | By: pwray@ceramics.org

Volume 93 Issue 1, Pages 18 – 21

 

Zhijun Xu, Ruiqing Chu, Jigong Hao, Yanjie Zhang, Guorong Li, Qingrui Yin, Aili Ding
Published Online: Nov 23 2009 6:56PM
DOI: 10.1111/j.1551-2916.2009.03368.x

 

ABSTRACT
Using two-step particle-coating method, pyrochlore-free Pb(Mg1/3Nb2/3)O3 (PMN) powders have been successfully synthesized by a single calcination step at a relatively lower calcined temperature of 850°C. The XRD and EDS results confirmed that the Mg-citric acid polymeric complex coatings effectively prevent direct contact between PbO and Nb2O5 and thus avoid the formation of pyrochlore phase. The coated powders were calcined directly without the ball-milling procedure at 850°C. The pyrochlore-free PMN powders obtained showed uniform and even grain size. The results showed that this method is an attractive method for the synthesis of PMN-based composite powders.

 

Online Access to Journal of the American Ceramic Society


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