PZN-PT材料的合成与表征

S. Winzer, A. Bailey, A. Ritter, I. Jawed
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引用次数: 1

摘要

从熔体中合成了Pb(Zn1/3Nb2/3)03-PbTiO3体系中亲晶边界附近的成分,并对其进行了分析。在熔融合成的晶体中,发现PbTi03组分的变化高达4 mol%,并且在早期研究人员定义的嗜形边界附近区域中,菱形相和四方相共存。由熔融合成的晶体制成的粉末被用来制造陶瓷。陶瓷中单个颗粒的组成与起始粉末的组成相同,并且在烧制后仍保留高达85%的钙钛矿相。单独的ZnO晶粒出现在晶界处,有或没有富铅相,取决于合成条件。形成的焦绿石相通常不与PbO或ZnO相结合,并且更集中在陶瓷颗粒的外表面附近。介绍了钙钛矿的电学性能,并讨论了增加钙钛矿用量的可能方法。介绍离子
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Synthesis and Characterization of PZN-PT Materials
Compositions near the morphotropic boundary in the Pb(Zn1/3Nb2/3)03-PbTiO3 system were synthesized from the melt and analyzed. Up to four mol% variation in the PbTi03 component was found in meltsynthesized crystals, and both rhombohedral and tetragonal phases coexist in the region n ear the morphotropic boundary defined by earlier researchers. Powders made from the melt-synthesized crystals were used to make ceramics. Compositions of individual grains in the ceramics are the same as those of the starting powders, and up to 85% of the perovskite phase remains after firing. Individual grains of ZnO appear at grain boundaries, w ith or without a lead-rich phase, depending on the synthesis conditions. A pyrochlore phase forms that is not generally a ssociated with PbO or ZnO phases and is more concentrated n ear the outer surfaces of the ceramic pellets. Electrical properties are presented and possible approaches to increasing the amount of perovskite are discussed. INTRODUCT ION
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