Variation of Dielectric Properties and Phase Stabilities with Substitution of A-Site in <TEX>$Pb(Zn_{0.6}Mg_{0.4})_{1/3}Nb_{2/3}O_3$</TEX>[PZMN] System

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J. Korean Ceram. Soc. > Volume 33(10); 1996 > Article

Journal of the Korean Ceramic Society 1996;33(10): 1131.

$Pb(Zn_{0.6}Mg_{0.4})_{1/3}Nb_{2/3}O_3$ [PZMN] 계에서 A-자리 치환에 따른 상안정화 및 유전 특성 변화

김봉철, 김정주, 김남경¹, 조상희

경북대학교 무기재료공학과
¹경북대학교 무기재료공학

Variation of Dielectric Properties and Phase Stabilities with Substitution of A-Site in $Pb(Zn_{0.6}Mg_{0.4})_{1/3}Nb_{2/3}O_3$[PZMN] System

ABSTRACT

The dielectric properties and phase stabilities of Pb(Zn0.6Mg0.4)1/3Nb2/3O3 [PZMN]system were investigated into substitution of A-site with Ba, Sr and Ca ions. The A-site substitutions led to the complexity of components of perovskite phase and then DPT coefficient increased. The A-site substitutions of Ba or Sr ion perovskite single phase could be easily formed by columbite process due to increase of perovskite phase stability. The variation of lattice parameters in specimen obeyed Vegard's law and curie temperature and dielectric constant of specimen decreased linearly. But Ca substitution led to perovskite phae instability. The lattice parameter dielectric constant and curie temperature of specimens drasticaly decreased with formation of pyrochlore phase.

Key words: $Pb(Zn_{0.6}Mg_{0.4})_{1/3}Nb_{2/3}O_3$, Perovskite, dielectric, Phase stability