含铅弛豫铁电材料合成过程中的烧录石相  

PYROCHLORE IN SYNTHESIS PROCESS OF LEAD-BASED FERROELECTRIC RELAXOR

作　　者：李承恩[1] 薛军民[1] 倪焕尧[1] 殷之文[1] 

机构地区：[1]中国科学院上海硅酸盐研究所,上海功能材料实验室

出　　处：《功能材料与器件学报》1996年第2期71-77,共7页Journal of Functional Materials and Devices

摘　　要：Ｐｂ（Ｂ_１，Ｂ_２）Ｏ_３型弛豫铁电材料由于其优异的介电性能而日益受到关注，但是，由于烧录石相的存在，很难获得纯钙钛矿相的Ｐｂ（Ｂ_１Ｂ_２）Ｏ_３材料，因而影响对这类材料的研究及其应用。本文以ＰＭＮ为例，从动力学和热力学角度阐述了烧录石相的形成原因，并且介绍了几种去除烧录石相的方法，以求对于含铅弛豫铁电材料中烧录石相的形成有一个较全面的认识。Compositions in the perovskite family, having the general formula Pb(B_1,B_2)O_3 and known as ferroelectric relaxors are of considerable interest. However, such materials are difficult to be fabricated without the appearance of a pyrochlore phase.In this paper, recent works on the kinetics and thermodynamics of the perovskite vs pyrochlore formation specially for PMN are analysed, and several methods of preparing pure perovskite phase are presented.

关 键 词：含铅 弛豫铁电材料 烧录石相 钙钛矿相 

分 类 号：TM22[一般工业技术—材料科学与工程]