%0 Journal Article
%T Characters of Piezoelectricity and Phase Transition of PMN-PT Single Crystals and Ceramics<br>PMN-PT单晶与陶瓷在性能及相变方面的特点
%A WANG Ping-Chu
%A LUO Hao-su
%A LI Dong-lin
%A PAN Xiao-ming
%A CHEN Xin-Chen
%A YIN Zhi-Wen
%A <br>王评初
%A 罗豪
%A 李东林
%A 潘晓明
%A 陈辛尘
%A 殷之文
%J 无机材料学报
%D 2001
%I Science Press
%X Some special features in dielectric, piezoelectric properties and phase transition behavior of (1 - x)Pb(Mg1/3Nb2/3)O3 - xPbTiO3 (PMN-PT) (x=0.24, 0.3, 0.33 and 0.35) single crystals grown by Bridgman method were outlined: 1) Extremely high piezoelectric constant d33 (up to 3000 PC/N) and coupling factors k33 and kt (up to 0.94 and 0.62 respectively), low mechanical factor of merit (Qm~60), large dielectric constant (~5000).2) Strong orientation dependence of piezoelectric properties. 3) with increasing PT content, the system becomes less relaxational, but at least upto x=0.35, the system still partly exhibites relaxor feature: for x=0.33 and 0.35. ~ T curves look sharp enough to show a normal ferroelectric like feature, however when T> Tm the ~ T relation does not obey Curie-Weiss law, but follows Smolenskii's relation. The piezoelectric properties of PMN-PT ceramics are similar to PZT-5H, but with higher e and k31.
%K Ph(Mg1/3Nb2/3)O3-PbTiO3
%K piezoelectric property
%K relaxor<br>铌镁酸铅
%K 钛酸铅
%K 压电性
%K 相变
%K PWN－PT单晶
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=84529CA2B2E519AC&jid=ABC0063016AF57E1C73EF43C8D2212BD&aid=C0D94B4D34314202&yid=14E7EF987E4155E6&vid=7801E6FC5AE9020C&iid=CA4FD0336C81A37A&sid=014B591DF029732F&eid=95D537AC89B28832&journal_id=1000-324X&journal_name=无机材料学报&referenced_num=5&reference_num=12