Microstructure and Electrical Properties of (1−x)Bi(Li1/3Zr2/3)O3–xPbTiO3 Piezoelectric Ceramics
Microstructure and Electrical Properties of (1−x)Bi(Li1/3Zr2/3)O3–xPbTiO3 Piezoelectric Ceramics
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DOI：
10.1111/j.1551-2916.2010.03625.x
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发表时间：
2010-06
影响因子：
3.9
通讯作者：
Jun Chen;Xiaowei Wang;W. Jo;J. Rödel
中科院分区：
文献类型：
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作者：
Jun Chen;Xiaowei Wang;W. Jo;J. Rödel
采用Li 1+作为Me位阳离子的一部分，制备了一种新型的BiMeO 3-PbTiO 3。几种（1-x）Bi（Li，Me″）O3-xPbTiO 3组合物用较高化合价的Me″阳离子（Me″= Ti 4+、Zr 4+、Mn 4+、Sn 4+、Nb 5+和Ta 5+）制备。（1-x）Bi（Li，Me″）O3-xPbTiO 3显示出Bi（Li，Me″）O3在PbTiO 3中的低溶解度。虽然（1-x）Bi（Li，Me″）O3-xPbTiO 3有多种可能的组成，但没有发现准同型相界，经过初步筛选，（1-x）Bi（Li 1/3 Zr 2/3）O3-xPbTiO 3由于其相对较大的溶解度极限（x=0.7）和较低的晶格畸变（c/a=1.036）而被认为是最有前途的致动器应用材料。然后，它被选中进行系统的研究，结构，铁电，压电性能。另外，为了提高（1-x）Bi（Li 1/3 Zr 2/3）O3-xPbTiO 3的压电特性，进一步添加La。0.3Bi（Li 1/3 Zr 2/3）O3−0.7PbTiO3和0.3（Bi0.9La0.1）（Li 1/3 Zr 2/3）O3−0.7PbTiO3的温度依赖性通过研究介电常数和大信号d33来评估。0.3Bi（Li 1/3 Zr 2/3）O3−0.7PbTiO3具有低损耗的介电常数（0.025）、铁电性能（EC=5.9 kV/mm，Pr=20.8 μC/cm 2，Psat=25.9 μC/cm 2）、压电系数（小信号d33=78 pC/N，大信号d33=106 pm/V）和居里温度（TC=290°C）。La（10 mol%）取代Bi起到软作用，具有增强的d33（98 pC/N）和降低的TC（215°C）。
A new type of BiMeO3–PbTiO3 was prepared by using Li1+ as part of the Me site cations. Several (1−x)Bi(Li,Me″)O3–xPbTiO3 compositions were prepared with Me″ cations of a higher valence (Me″=Ti4+, Zr4+, Mn4+, Sn4+, Nb5+, and Ta5+). (1−x)Bi(Li,Me″)O3–xPbTiO3 exhibits a low solubility of Bi(Li,Me″)O3 in PbTiO3. Although there are many possible compositions of (1−x)Bi(Li,Me″)O3–xPbTiO3, no morphotropic phase boundary was found. After the initial screening, (1−x)Bi(Li1/3Zr2/3)O3–xPbTiO3 was identified as the most promising material for actuator applications due to its relatively large solubility limit (x=0.7) and low lattice distortion (c/a=1.036). It was then chosen for systematical study with respect to structure, ferroelectric, and piezoelectric properties. In addition, La was further added to improve the piezoelectric properties of (1−x)Bi(Li1/3Zr2/3)O3–xPbTiO3. The temperature dependence of 0.3Bi(Li1/3Zr2/3)O3−0.7PbTiO3 and 0.3(Bi0.9La0.1)(Li1/3Zr2/3)O3−0.7PbTiO3 was assessed by investigating the dielectric constantand large-signal d33. 0.3Bi(Li1/3Zr2/3)O3−0.7PbTiO3 exhibits a dielectric constantwith a low loss (0.025), ferroelectric properties (EC=5.9 kV/mm, Pr=20.8 μC/cm2, and Psat=25.9 μC/cm2), piezoelectric coefficients (small-signal d33=78 pC/N and large-signal d33=106 pm/V), and Curie temperature (TC=290°C). La (10 mol%) substitution for Bi acts as a soft role with an enhanced d33 (98 pC/N) and reduced TC (215°C).