Dielectric and piezoelectric properties of 〈001〉 fiber-textured 0.675Pb(Mg1/3Nb2/3)O3–0.325PbTiO3 ceramics
Dielectric and piezoelectric properties of 〈001〉 fiber-textured 0.675Pb(Mg1/3Nb2/3)O3–0.325PbTiO3 ceramics
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DOI：
10.1063/1.1554488
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发表时间：
2003-03
影响因子：
3.2
通讯作者：
E. Sabolsky;S. Trolier-McKinstry;G. Messing
中科院分区：
文献类型：
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作者：
E. Sabolsky;S. Trolier-McKinstry;G. Messing
将0.675Pb（Mg 1/3 Nb 2/3）O3-0.325PbTiO3（PMN-32.5PT）陶瓷组合物（具有1 wt. %过量PbO）通过使用5体积%取向的{001}-BaTiO 3片状晶体作为模板的模板晶粒生长工艺在{001}方向上纤维织构化。在1150 °C下退火5 h的模板陶瓷获得高达0.9的织构分数。纤维织构化的样品表现出增加的压电，机电耦合，和顺应性系数时，极化和测量在10001 μ m织构化的方向。直接从单极应变场测量中测得的X1001中的低驱动场（<5 kV/cm）d33系数为1150 pC/N。该d33系数比随机取向的样品大1.2-1.5倍。0.9织构PMN-32.5PT陶瓷的极化emax和ert分别为21500和2450。限制进一步改善性能的因素进行了讨论。
The 0.675Pb(Mg1/3Nb2/3)O3–0.325PbTiO3 (PMN–32.5PT) ceramic composition (with 1 wt. % excess PbO) was fiber textured in the 〈001〉 direction by the templated grain growth process using 5 vol % oriented {001}-BaTiO3 platelet crystals as the templates. The templated ceramics annealed at 1150 °C for 5 h attained texture fractions as high as 0.9. The fiber-textured samples showed an increase in the piezoelectric, electromechanical coupling, and compliance coefficients when poled and measured in the 〈001〉-textured direction. The low drive field (<5 kV/cm) d33 coefficients in the 〈001〉, measured directly from unipolar strain-field measurements, were ∼1150 pC/N. This d33 coefficient is 1.2–1.5 times greater than randomly oriented samples. The poled emax and ert for a 0.9-textured PMN–32.5PT ceramic were 21 500 and 2450, respectively. Factors limiting further property improvements are discussed.