采用高温溶液法生长了准同型相界(MPB)四元弛豫铁电单晶Pb(Sc1/2Nb1/2) O3-Pb(Mg1/3 Nb2/3)O3-PbTiO3-PbZrO3,得到较大尺寸且具有规则外形的立方单晶.研究结果表明所生长的晶体为钙钛矿结构,立方晶粒平整的暴露面均为(001)面;晶体以层状方式生长,生长机制为搭桥生长;所生长晶体的矫顽场Ec~3.52kV/cm,三方四方相变温度Tr-t~104℃,居里温度Tc~149.5℃,压电常数d33~1089 pC/N,剩余极化强度Pr~25.4 μC/cm2;随着频率增加,晶体的相变弥散度减小.
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