Synthesis and Properties of Dielectric Ceramics from Metallo‐Organic Precursors through the Solid‐State Reaction of Mixed Gels

Abstract

A perovskite structure of 0.4Pb(Mg1/3Nb2/3)O3·0.3Pb(Mg1/2W1/2)O3·0.3PbTiO3 was prepared from metallo‐organic precursors through the solid‐state reaction of the mixed gels. Three types of mixed gels were crystallized to obtain PbTiO3, MgNb2O6, and MgWO4 powders. These powders were calcined at 900°C after mixing with a stoichiometric amount of Pb(CH3COO)2·3H2O. The dielectric constant of the ceramic fired at 900°C was improved by adding an excess of 10 mol% Mg(OC2H5)2, and the ceramic achieved X7T specification of the Electric Industries Association standard. The dielectric loss was reduced by adding an excess of 5 mol% Pb(CH3COO)2·3H2O.