Structure, dielectric and piezoelectric properties of (0.9−x)(Bi0.95La0.05)FeO3−xPbTiO3− 0.1BaZrO3 ceramics

2015 Symposium on Piezoelectricity, Acoustic Waves, and Device Applications (SPAWDA) Pub Date : 2015-10-01 DOI:10.1109/SPAWDA.2015.7364524

Qiang Li, Yingjie Dong, Jinrong Cheng, Jianguo Chen

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引用次数: 1

Abstract

(0.9-x)(Bi_0.95La_0.05)FeO_3-xPbTiO₃-0.1BaZrO₃ (BLF-xPT-BZ) ceramics were synthesized by the conventional solid state reaction method. The X-ray diffraction (XRD) results reflected that phase transformation from rhombohedral (R) to tetragonal (T) took place with increasing the PT content, and the coexistence R and T phases were observed at x = 0.35. The dielectric constant (ε_r), dielectric loss (tanδ), remnant polarization (Pr) and piezoelectric coefficient (d₃₃) increased initially and then decreased with increasing the PT content, and reach to maximum at x = 0.35. The TC, Td, ε_r, d₃₃, S and kp of 0.55BLF-0.35PT- 0.1BZ were 422 °C, 380 °C, 620, 162 pC/N, 0.3 % and 0.272, respectively. It was interesting that the maximum strain of BLF-xPT-BZ ceramics achieves about 0.3% under the electric field of 75 kV/cm, which was larger than that of BiScO₃-PbTiO₃ ceramics.

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(0.9−x)(Bi0.95La0.05)FeO3−xPbTiO3−0.1BaZrO3陶瓷的结构、介电和压电性能

采用常规固相反应法制备了(0.9-x)(Bi0.95La0.05)FeO3-xPbTiO3-0.1BaZrO3 (BLF-xPT-BZ)陶瓷。x射线衍射(XRD)结果表明，随着PT含量的增加，材料发生了由菱形(R)向四方(T)相转变，在x = 0.35处出现了R相和T相共存的现象。介电常数(εr)、介电损耗(tanδ)、剩余极化(Pr)和压电系数(d33)随PT含量的增加先增大后减小，在x = 0.35时达到最大值。0.55BLF-0.35PT- 0.1BZ的TC、Td、εr、d33、S和kp分别为422°C、380°C、620、162 pC/N、0.3%和0.272。有趣的是，在75 kV/cm的电场下，BLF-xPT-BZ陶瓷的最大应变达到0.3%左右，比BiScO3-PbTiO3陶瓷的最大应变要大。

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2015 Symposium on Piezoelectricity, Acoustic Waves, and Device Applications (SPAWDA)

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