Maximum self‐generated electric field induced by pyroelectricity of PZT 95/5

Abstract

Abstract Electric field induced by pyroelectric effect is often observed in the ferroelectric devices when they subject to temperature change. But the maximum value of ferroelectric field is still unknown. If this value exceeds the coercive field or even reaches breakdown field, the ferroelectric devices may be damaged. In this study, pyroelectricexperimental of PbZr0.95Ti0.05O3 (PZT 95/5) ferroelectric ceramics was conducted to understand maximum self‐generated pyroelectric field. An equivalent circuit and path of pyroelectricity was built to analyze the pyroelectric field of PZT 95/5. Results indicated that maximum pyroelectric field is about 1.1 kV/mm. This value is controlled by the internal resistivity of PZT 95/5. A mean internal resistivity of PZT 95/5 is about 1 × 109 Ω·m during the low‐temperature to high‐temperature rhombohedral phase transformation.