Preparations and Characterizations of Perovskite PMN Ceramics by Using a One-Step Calcination Method

Abstract:

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A relaxor ferroelectric material, Pb(Mg1/3Nb2/3)O3 (PMN) powder with a pyrochlore-free phase, was prepared by using a one-step calcinations method. The pyrochlore phase was prevented by coating Mg(OH)2 on Nb2O5 particles. Pure-perovskite PMN powder was synthesized by a single calcination of the coating powder mixed with appropriate amounts of PbO at 900 oC for 2 h. The pyrochlore-free perovskite PMN powders were sintered to 96.9% density at 1100 oC. The sintered PMN ceramics exhibited a dielectric constant maximum of ~11 700 at room temperature at a frequency of 1 kHz.

Info:

Periodical:

Advanced Materials Research (Volumes 26-28)

Edited by:

Young Won Chang, Nack J. Kim and Chong Soo Lee

Pages:

255-258

DOI:

10.4028/www.scientific.net/AMR.26-28.255

Citation:

J. Chen et al., "Preparations and Characterizations of Perovskite PMN Ceramics by Using a One-Step Calcination Method", Advanced Materials Research, Vols. 26-28, pp. 255-258, 2007

Online since:

October 2007

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Price:

$35.00

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