新型弛豫铁电单晶(1-x)Pb(Zn_(1/3)Nb_(2/3))O_(3-x)PbTiO_3生长的技术创新  

TECHNICAL INNOVATIONS ON THE GROWTH OF NOVEL RELAXOR FERROELECTRIC CRYSTAL (1-x)Pb(Zn_(1/3)Nb_(2/3)O_(3-x)PbTiO_3

作　　者：徐家跃[1] 

机构地区：[1]中国科学院上海硅酸盐研究所,上海200050

出　　处：《硅酸盐学报》2007年第S1期82-88,共7页Journal of The Chinese Ceramic Society

基　　金：国家自然科学基金(50672111)资助项目。

摘　　要：(1-x)Pb(Zn_(1/3)Nb_(2/3))O_(3-x)PbTiO_3(PZNT)晶体是弛豫铁电体Pb(Zn_(1/3)Nb_(2/3)O_3与普通铁电体PbTiO_3组成的具有钙钛矿结构的固溶体,其准同型相界成分(x=0.09)附近表现出极其优异的压电性能,在医用超声成像、声纳、微位移器等方面具有广阔的应用前景,分析了PZNT-PbO赝二元系的析晶行为和相关系,总结了PZNT晶体的压电性能,讨论了生长工艺和成分对晶体性能的影响。针对PZNT晶体生长中存在的问题,发展了助熔剂-坩埚下降法、通气诱导成核技术、两步法生长工艺、区熔凝固技术、底部籽晶高温溶液法等多种生长技术,生长出大尺寸的PZNT晶体,并比较了这些生长技术的特点。Perovskite (1-x)Pb(Zn_(1/3)Nb_(2/3))O_(3-x)PbTiO_3 (PZNT) crystal is a solid solution crystal of relaxor ferroelectric Pb(Zn_(1/3)Nb_(2/3))O_3 and PbTiO_3.The crystal exhibits excellent piezoelectric properties that are superior to those of conventional PZT piezoelectric ceramics at its morphotropic phase boundary,and has potential applications in medical ultrasonic transducer,sonar and solid actuators.In this paper,the crystallization behavior of PZNT-PbO system was discussed and the dependence of piezoele...

关 键 词：弛豫铁电体 晶体生长 坩埚下降法 

分 类 号：O782[理学—晶体学]