抄録
The effect of annealing conditions on 0.7Pb(Mg1/3Nb2/3)O3 - 0.3PbTiO3 ceramics fabricated by spark plasma sintering (SPS) method were investigated. As-sintered samples were required a post annealing treatment for recovering their insulation from the conductive behavior caused by a partial reduction during SPS process. The treatment was necessary in a PbO-rich atmosphere for avoiding the decomposition of samples, and it not only removed oxygen vacancies but also promoted the crystal grain growth as well as the dielectric properties of samples. The higher anneal temperature and longer anneal duration were effective in the increase of the dielectric properties of samples.
