High electrostrictive strain in lead-free relaxors near the morphotropic phas e boundary
发布时间：2025-04-30
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- 发布时间：
- 2025-04-30
- 论文名称：
- High electrostrictive strain in lead-free relaxors near the morphotropic phas e boundary
- 发表刊物：
- Acta Materialia
- 摘要：
- Thanks to its small hysteresis, large electrostrictive strain in relaxor ferroelectrics is superior than piezoelectric strain for applications in precision microactuators. Although relaxor ferroelectrics exhibit the largest electrostrictive strain in ceramics, the magnitude of the strain is limited to ∼0.20% at room temperature due to the large amount of non-ferroelectric defects existing in relaxors. In this work, we develop a relaxor with a morphotropic phase boundary (MPB) by doping a rhombohedral (R3m) ferroelectric BaZr0.2Ti0.8O3 into a tetragonal (P4 mm) ferroelectric 0.89Bi0.5Na0.5TiO3-0.11BaTiO3. A high electrostrictive strain of 0.27% is achieved at room temperature in the relaxor sample. Experimental results illustrate that the composition is near the MPB and exhibits the existence of nanodomains, favoring the achievement of high electrostrictive strain. Moreover, phase field simulations show that the high …
- 合写作者：
- Tangyuan Li; Chang Liu; Xiaoqin Ke; Xiao Liu; Liqiang He; Peng Shi; Xiaobing Ren; Yunzhi Wang; Xiaojie Lou
- 卷号：
- 182
- 页面范围：
- 39-46
- 是否译文：
- 否
- 发表时间：
- 2020-01-01