| $Pb(Zn, Mg)_{1/3}Nb_{2/3}O_3-PbTiO_3$계에서 구성 산화물 첨가에 따른 Perovskite상 안정화 및 DPT성 증대 효과 |
| 이규만, 장현명, 유병두1 |
포항공과대학 재료공학과 정밀세라믹스 공정과학연구실
1국방과학연구소 소재연구소 |
| Stbilization of Perovskite Phase and Enhanced DPT Characteristics of $Pb(Zn, Mg)_{1/3}Nb_{2/3}O_3-PbTiO_3$ Ceramics by the Additionof Excess Constituent Oxides |
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| ABSTRACT |
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The perovskite phase in PZN-PMN-PT (Pb(Zn, Mg)1/3Nb2/3O3-PbTiO3) pseudoternary ceramics was stabilized by the addition of excess constituent divalent oxides (PbO, MgO and ZnO). The excess addition of 5mol% MgO or 7.5mol% PbO fully stabilized the perovskite phase. The enhanced diffuse phase transition (DPT) and the decrease in the electrical resistivity observed in the presence of excess ZnO or MgO were interpreted in terms of the additional formation of negatively charged, short-range ordered 1:1 domains with a concomitant generation of charge carriers, holes. |
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