Monitoring the ferroelectric phase transition of barium titanate ceramics via impulse excitation

被引：4

作者：

Pabst, Willi ^{[1
]}

Gregorova, Eva ^{[1
]}

Simonova, Petra ^{[1
]}

Uhlirova, Tereza ^{[1
]}

机构：

[1] Univ Chem & Technol, Prague UCT Prague, Dept Glass & Ceram, Prague, Czech Republic

来源：

FERROELECTRICS | 2023年 / 611卷 / 01期

关键词：

Barium titanate ceramics (unpoled polycrystalline); temperature-dependent impulse excitation (Young's modulus; damping); elastic anomaly; ferroelectric Curie temperature; hysteresis; ALUMINA-ZIRCONIA COMPOSITES; ELASTIC PROPERTIES; MECHANICAL LOSS; MODULUS; BEHAVIOR; DEPENDENCE; CONSTANTS; ANOMALIES; POROSITY;

D O I：

10.1080/00150193.2023.2201780

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Impulse excitation is a suitable tool to determine the temperature dependence of Young's modulus and to monitor the ferroelectric phase transition of unpoled barium titanate ceramics (tetragonal-to-cubic and vice versa). By measurement from room temperature to 200-300 & DEG;C and back, it is found that there is an elastic anomaly with a sharp minimum (at 120 & DEG;C during heating and 110 & DEG;C during cooling, with a completely reproducible hysteresis), below and above which Young's modulus exhibits values of 40-50 GPa and up to 90 GPa, respectively, and damping changes abruptly from values of order 0.01 to less than 0.001.

引用

页码：171 / 187

页数：17

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