无机材料学报2001，Vol.16Issue(1)：56-62,7.
PMN-PT单晶与陶瓷在性能及相变方面的特点
Characters of Piezoelectricity and Phase Transition of PMN-PT
Single Crystals and Ceramics
王评初 1罗豪 1李东林 1潘晓明 1陈辛尘 1殷之文1
作者信息
摘要
Abstract
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 (Qm60), 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 ε～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 and k31.关键词
铌镁酸铅/钛酸铅/压电性/相变分类
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王评初,罗豪,李东林,潘晓明,陈辛尘,殷之文..PMN-PT单晶与陶瓷在性能及相变方面的特点[J].无机材料学报,2001,16(1):56-62,7.
