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(Sc_(1/2)Nb_(1/2))O_3-Pb(Mg_(1/3)Nb_(2/3))O_3-PbTiO_3-PbZrO_3,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(0...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(Sc_(1/2)Nb_(1/2))O_3-Pb(Mg_(1/3)Nb_(2/3))O_3-PbTiO_3-PbZrO_3,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^3.52 k V/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 p C/N,剩余极化强度Pr^25.4μC/cm2;随着频率增加,晶体的相变弥散度减小。展开更多
基金supported by the National Natural Science Foundation of China(21103133)Scientific Research Foundation for the Returned Overseas Chinese Scholars,Ministry of Education+2 种基金Natural Science Foundation of Shaanxi Province,China(2015JM5224)Shaanxi Provincial Education Department Program,China(2013JK0678)National Training Programs of Innovation and Entrepreneurship for Undergraduates,China(201510702030)
文摘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(Sc_(1/2)Nb_(1/2))O_3-Pb(Mg_(1/3)Nb_(2/3))O_3-PbTiO_3-PbZrO_3,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^3.52 k V/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 p C/N,剩余极化强度Pr^25.4μC/cm2;随着频率增加,晶体的相变弥散度减小。
