Phase-pure perovskite Pb(ZnxMg1-x)1/3Nb2/3O3 solid solution (PZxM1-xN) is obtained for x ≤ 0.7 by heating a milled stoichiometric mixture of PbO, Mg(OH)2, Nb2O5, and 2ZnCO3·3Zn(OH)2·H2O at 1100°C for 1 h. Percent perovskite (fp) with respect to total crystalline phase decreases with increasing temperature of subsequent heating then increases to 900°C for the mixtures where x ≤ 0.8 and milled for 3 h. For mixtures with x = 0.9 and x = 1, fp decreases monotonically. Curie temperature increases almost linearly with increasing x up to x = 0.7. The maximum dielectric constant at 1 kHz is 2×104 and 1.7×104 for the mixture with x = 0.4 and x = 0.7, respectively. The stabilization mechanism of strained perovskite is discussed.
|ジャーナル||Journal of the American Ceramic Society|
|出版ステータス||Published - 2000|
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