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
收藏
页码：171 / 187
页数：17
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