Journal of the American Ceramic Society, Vol.83, No.12, 3208-3210, 2000
Synthesis of phase-pure Pb(ZnxMg1-x)(1/3)Nb2/3O3 up to x=0.7 from a single mixture via a soft-mechanochemical route
Phase-pure perovskite Pb(ZnchiMg1-chi)(1/3)Nb2/3O3 solid solution (PZ(chi)M(1-chi)N) is obtained for chi less than or equal to 0.7 by heating a milled stoichiometric mixture of PbO, Mg(OH)(2), Nb2O5, and 2ZnCO(3) . 3Zn(OH)(2) .H2O at 1100 degreesC for 1 h. Percent perovskite (f(P)) with respect to total crystalline phase decreases with increasing temperature of subsequent heating then increases to 900 degreesC for the mixtures where chi less than or equal to 0.8 and milled for 3 h, For mixtures with chi = 0.9 and chi = 1,f(P) decreases monotonically. Curie temperature increases almost linearly with increasing chi up to chi = 0.7. The maximum dielectric constant at 1 kHz is 2 x 10(4) and 1.7 x 10(4) for the mixture with chi = 0.4 and chi = 0.7, respectively. The stabilization mechanism of strained perovskite is discussed.