Effects of antiferroelectric substitution on the structure and ferroelectric properties of a complex perovskite solid solution,Journal of Materials Chemistry C

当前位置： X-MOL 学术 › J. Mater. Chem. C › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Effects of antiferroelectric substitution on the structure and ferroelectric properties of a complex perovskite solid solution
Journal of Materials Chemistry C ( IF 5.7 ) Pub Date : 2020-03-20 , DOI: 10.1039/c9tc05084a
Zenghui Liu _{1,

2,

3,

4,

5} , Yi Yuan _{6,

7,

8,

9} , Zeng Luo _{1,

2,

3,

4,

5} , Hongyan Wan _{1,

2,

3,

4,

5} , Pan Gao _{1,

2,

3,

4,

5} , Hua Wu _{6,

7,

8,

9,

10} , Jian Zhuang _{1,

2,

3,

4,

5} , Jie Zhang _{1,

2,

3,

4,

5} , Nan Zhang _{1,

2,

3,

4,

5} , Hongzhong Liu _{4,

11,

12,

13} , Wei Ren _{1,

2,

3,

4,

5} , Zuo-Guang Ye _{6,

7,

8,

9}

Affiliation

Ferro-/piezoelectric materials are crucial for a wide range of technologically important devices including electromechanical sensors and actuators and nonvolatile memory. In order to design new materials with high performance and high Curie temperature and to understand the underlying relationship between the structure and properties, a novel solid solution of a complex perovskite was synthesized in the form of ceramics using the solid-state reaction method. The effects of the substitution of antiferroelectric PbZrO₃ (PZ) on the crystal structure, phase transitions, and dielectric and piezo-/ferroelectric properties of the Bi(Zn_2/3Nb_1/3)O₃–PbTiO₃ (BZN-PT) binary solid solution were studied. The phase transformation sequences of tetragonal ferroelectric phase → rhombohedral ferroelectric phase → orthorhombic antiferroelectric phase with a PZT-like morphotropic phase boundary (MPB) between the tetragonal and rhombohedral phases were indicated by X-ray diffraction and various electric measurements. A pseudobinary phase diagram delimiting the various phase regions was established by a combination of dielectric measurements, X-ray diffraction and selected area electron diffraction (SAED). Attractive electrical properties with d₃₃ = 260 pC N⁻¹, k_p = 0.41, P_r = 31.2 μC cm⁻², E_C = 16 kV cm⁻¹, T_C = 281 °C and T_MPB = 214 °C were obtained for the composition of x = 0.5, which is in the MPB region. A complex domain structure was found in this solid solution. Most importantly, the high piezoelectric properties obtained in the MPB composition was determined to arise from the significantly enhanced intrinsic contribution as evidenced by piezoresponse force microscopy (PFM). The enhanced electrical properties with a high T_C and in particular a high T_MPB in (1 − x)(0.2BZN–0.8PT)–xPZ arise from the combined effect of the MPB, the stereochemically active lone pair electrons on Bi³⁺ and the ferroelectrically active cations of Zn²⁺ and Nb⁵⁺, making it a novel piezoelectric material for electromechanical transducer applications. This work helps to further the understanding of the origin of the high piezoelectricity in bismuth-based solid solutions and opens up further investigation pathways into other bismuth-based solid solutions that could exhibit higher piezo-/ferroelectric performances.

中文翻译：

反铁电取代对复杂钙钛矿固溶体结构和铁电性能的影响

铁/压电材料对于包括机电传感器，执行器和非易失性存储器在内的各种技术上重要的设备至关重要。为了设计具有高性能和高居里温度的新材料并了解结构与性能之间的潜在关系，使用固态反应方法以陶瓷形式合成了复合钙钛矿的新型固溶体。反铁电的PbZrO的取代的效果₃（PZ）的晶体结构，相变，电介质和和压阻/铁电特性的铋（锌的_2/3的Nb _1/3）O ₃ -PbTiO ₃研究了（BZN-PT）二元固溶体。通过X射线衍射和各种电学测量表明了四方铁电相→菱面体铁电相→斜方体反铁电相在四方相和菱面体相之间具有PZT形变相界（MPB）的相变序列。通过介电测量，X射线衍射和选择区域电子衍射（SAED）的组合，建立了界定各个相区的伪二元相图。d ₃₃ = 260 pC N ^-1，k _p = 0.41，P _r = 31.2μCcm ^-2，E _C的有吸引力的电性能对于x = 0.5的组成（位于MPB区域），可得到= 16 kV cm ^-1，T _C = 281°C和T _MPB = 214°C 。在该固溶体中发现了复杂的畴结构。最重要的是，在MPB组合物中获得的高压电性能被确定为由压电响应力显微镜（PFM）证明的内在贡献显着增强所致。在（1 − x）（0.2BZN–0.8PT）– x中具有高T _C尤其是高T _MPB的增强的电性能PZ是由MPB，Bi ³⁺上的立体化学活性孤对电子以及Zn ²⁺和Nb ⁵⁺的铁电活性阳离子的共同作用产生的，使其成为用于机电换能器应用的新型压电材料。这项工作有助于进一步了解铋基固溶体中高压电性的起源，并为进一步显示出可能表现出更高压电/铁电性能的铋基固溶体开辟了进一步的研究途径。

更新日期：2020-03-20

点击分享查看原文

点击收藏

阅读更多本刊最新论文本刊介绍/投稿指南11