Variations of Reaction Sequence with Precusor Mixing Methods in the Formation of <TEX>$Pb(Zn_{0.6}Mg_{0.4})_{1/3}Nb_{2/3}O_3$</TEX>[PZMN]

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J. Korean Ceram. Soc. > Volume 35(5); 1998 > Article

Journal of the Korean Ceramic Society 1998;35(5): 458.

$Pb(Zn_{0.6}Mg_{0.4})_{1/3}Nb_{2/3}O_3$[PZMN] 합성시 전구체 혼합방법에 따른 반응 경로변화

김봉철, 김정주, 김남경, 조상희

경북대학교 무기재료공학과

Variations of Reaction Sequence with Precusor Mixing Methods in the Formation of $Pb(Zn_{0.6}Mg_{0.4})_{1/3}Nb_{2/3}O_3$[PZMN]

ABSTRACT

Variations of reaction sequence of $Pb(Zn_{0.6}Mg_{0.4})_{1/3}Nb_{2/3}O_3$[PZMN] with precusor mixing methods were ex-amined using X-ray diffraction and dielectric characteristics. In the present study three different types of precursor mixing methods (oxide mixing PbO+$ZnNb_2O_6+MgNb_2O_6$[Zn+MN] and PbO+(Zn,Mg)$Nb_2O_6$[ZMN] precursor mixing) were adopted. When the oxide mixing method was used for the PZMN synthesis a Zn-rich perovskite phase and pyrochlore phase were formed. Compared with PbO+ZN+MN precursor mixing method the PbO-ZMN precursor led to a lowering of the formation temperature for perovskite sin-gle phase. These variation of composition and formation temperature of the perovskite phase were dis-cussed in terms of the difference in the solid-reaction requence between these three different types of pre-cursor mixing.

Key words: $Pb(Zn_{0.6}Mg_{0.4})_{1/3}Nb_{2/3}O_3$[PZMN], Perovskite, Precursor mixing, Oxide mixing