A Study on Microstructures and Dielectric Properties in <TEX>$Pb(Mg_{1/3}Nb_{2/3})O_3-PbTiO_3-BaTiO_3$</TEX> Solid Solution

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J. Korean Ceram. Soc. > Volume 31(10); 1994 > Article

Journal of the Korean Ceramic Society 1994;31(10): 1240.

$Pb(Mg_{1/3}Nb_{2/3})O_3-PbTiO_3-BaTiO_3$ 고용체의 미세구조와 유전특성에 관한 연구

박현, 이응상

한양대학교 무기재료공학과

A Study on Microstructures and Dielectric Properties in $Pb(Mg_{1/3}Nb_{2/3})O_3-PbTiO_3-BaTiO_3$ Solid Solution

ABSTRACT

While sintering the Pb(Mg1/3Nb2/3)O3-PbTiO3-BaTiO3 system through solid-reaction route, pyrochlore(Pb3Nb4O13) phase while reduces the dielectric constant is inevitably formed. Substitution of Pb(Mg1/3Nb2/3)O3 with PbTiO3 and BaTiO3 can retard the occurrence of pyrochlore phase. The perovskite solid-solution without containing pyrochlore phase can be obtained when we consolidated the materials consisting of PbTiO3 and BaTiO3 at 1200℃ for 2 hours. The sintered body composed of 0.8Pb(Mg1/3Nb2/3)O3-0.1PbTiO3-0.1BaTiO3 composition showed the diffused phase transition(DPT) phenomena and the maximum value of dielectric constant at 0℃ (Tc') with the value of 1.3×104.