Advances in Applied Ceramics ( IF 2.2 ) Pub Date : 2021-03-28 , DOI: 10.1080/17436753.2021.1904765 Mitsuhiro Okayasu 1 , Masakazu Okawa 1
ABSTRACT
The material properties and damage characteristics of lead zirconate titanate(PZT) ceramics were investigated at various temperatures. A positive voltage was obtained when the sample was cooled from 20°C to −190°C, while a negative voltage was obtained when the sample was heated from −190°C to 180°C. The difference between the positive and negative values depended on the thermal stress. Compressive stress generated a more positive voltage in the cooling process, while tensile stress led to a more negative voltage in the heating process. The voltage values also depended on the cooling (or heating) rate of the sample, e.g. the greater the cooling (or heating) rate, the greater the voltage. When cyclic loading was conducted mechanically at −190°C, the voltage reduced, but it was recovered after heating to 20°C. Damage of the PZT ceramic (90° domain switching) was detected when the sample was cooled to −190°C due to the high thermal stress.
中文翻译:
锆钛酸铅陶瓷的低温和高温压电性能
摘要
研究了锆钛酸铅(PZT)陶瓷在不同温度下的材料性能和损伤特性。当样品从 20°C 冷却至 -190°C 时获得正电压,而当样品从 -190°C 加热至 180°C 时获得负电压。正值和负值之间的差异取决于热应力。压应力在冷却过程中产生了更多的正电压,而拉应力在加热过程中产生了更多的负电压。电压值还取决于样品的冷却(或加热)速率,例如冷却(或加热)速率越大,电压越大。在-190°C进行机械循环加载时,电压降低,但加热至20°C后恢复。