Abstract

Barium titanate prepared by two step sintering method is preferred for its small grain size approximately 1 µm and high piezoelectric constant 470. In this paper, finite element analysis (FEA) is performed to quantitatively determine the influence of external applied stress on the generated surface potential and polarization effect for both poled and unpoled BaTiO₃. The modeling simulation verified that poled BaTiO₃ is approximately 1.5 times more responsive to applied stress. The results also indicate that the maximum surface potential is generated when stress is applied parallel to the direction of electric dipole.

中文翻译：

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极化和非极化钛酸钡的计算模型，以确定相对介电常数和压电常数的影响

摘要

采用两步烧结法制备的钛酸钡由于其晶粒小约 1 µm 和高压电常数 470 是首选。 本文通过有限元分析 (FEA) 定量确定外加应力对产生的表面电位的影响极化和非极化 BaTiO _{3 的}极化效应。建模模拟验证了极化的 BaTiO ₃对施加的应力的响应大约是其 1.5 倍。结果还表明，当应力平行于电偶极子方向施加时，会产生最大表面电势。