Role of perovskite PMN in phase formation and electrical properties of high dielectric Pb[(Mgx, Zn1-x)1/3Nb2/3]O3 ceramics

被引:19
作者
Chen, SY [1 ]
Wang, CM
Cheng, SY
机构
[1] Natl Chiao Tung Univ, Inst Mat Sci & Engn, Hsinchu 300, Taiwan
[2] Ind Technol Res Inst, Mat Res Labs, Hsinchu 31015, Taiwan
关键词
perovskite PMN; electrical properties; ceramics;
D O I
10.1016/S0254-0584(97)02024-5
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
The structural evolution of perovskite phase Pb[(MgxZn1-x)(1/3)Nb-2/3]O-3 (abbreviated to PZMN) was found to be highly dependent on its precursors' strong tendency of forming pyrochlore phase in the mixture of raw materials. Three major pyrochlore compositions, Pb2Nb2O7, Pb3Nb2O8 and Pb3Nb4O13, were characterized and analyzed to understand their roles in the formation of the perovskite PZMN phase. Based on phase structure evolution, a preparation method for forming high dielectric constant PZMN ceramics without using common stabilizers such as SrTiO3 was proposed. By using pre-synthesized perovskite PMN, a Zn-rich PZMN composition with an almost 100% perovskite content and a maximum dielectric constant of 22 000 at 1 kHz is obtained. The formation mechanism of PZMN perovskite phase was also reported in this research. The pre-synthesized perovskite PMN acts as stabilizer and nuclei to initiate PZMN perovskite formation through the reaction in the PMN/ZnO interface. A ternary phase diagram of PMN-PZN-SrTiO3 was further constructed to investigate the perovskite development and its related electrical properties. (C) 1998 Elsevier Science S.A.
引用
收藏
页码:207 / 213
页数:7
相关论文
共 16 条
[1]  
BELSICK JR, 1987, AM CERAM SOC BULL, V66, P664
[2]   The effect of pyrochlore phase on formation mechanism and electrical properties of perovskite PZMN relaxors [J].
Chen, SY ;
Wang, CM ;
Cheng, SY .
MATERIALS CHEMISTRY AND PHYSICS, 1997, 49 (01) :70-77
[3]  
CHEN SY, 1991, Patent No. 5030604
[4]   DIELECTRIC-PROPERTIES OF MODIFIED LEAD ZINC NIOBATE CERAMIC [J].
FURUKAWA, O ;
YAMASHITA, Y ;
HARATA, M ;
TAKAHASHI, T ;
INAGAKI, K .
JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS SHORT NOTES & REVIEW PAPERS, 1985, 24 :96-99
[5]  
HALLIYAL A, 1987, AM CERAM SOC BULL, V66, P671
[6]   MECHANISM OF FORMATION OF PEROVSKITE PHASE AND DIELECTRIC-PROPERTIES OF PB(ZN,MG)(1/3)NB2/3O3 CERAMICS PREPARED BY COLUMBITE PRECURSOR ROUTES [J].
JANG, HM ;
CHO, SR ;
LEE, KH .
JOURNAL OF THE AMERICAN CERAMIC SOCIETY, 1995, 78 (02) :297-304
[7]   THERMODYNAMIC STABILITY AND MECHANISMS OF FORMATION AND DECOMPOSITION OF PEROVSKITE PB(ZN1/3NB2/3)O3 PREPARED BY THE PBO FLUX METHOD [J].
JANG, HM ;
OH, SH ;
MOON, JH .
JOURNAL OF THE AMERICAN CERAMIC SOCIETY, 1992, 75 (01) :82-88
[8]  
KLUG HP, 1974, XRAY DIFFRACTION PRO, P411
[9]  
KUWATA J, 1979, FERROELECTRICS, V22, P863, DOI 10.1080/00150197908239443
[10]  
LEJEUNE M, 1986, PHYS C S, V47, pC1895