Abstract

The determination of the breakdown voltage and the diagnostics of the prebreakdown state of a material is a topical problem of studying characteristics of insulating materials and structures based on them when applying an external electric field. The new effective method of the diagnostics of the prebreakdown state of multilayer structures (MLC) based on the ferroelectric–relaxor 0.55Pb–Mg_1/3Nb_2/3O₃–0.45-PbSc_1/2Nb_1/2O₃ (PMN–PSN) is considered. The method is based on an analysis of the dynamics of changing the MLC surface temperature during applying an external electric field. A series of the MLC samples has been tested under action of electric field E = 10–120 kV/cm and the ambient temperature from room temperature to 80°C. The critical electric field that characterizes the prebreakdown state of the PMN–PSN multilayer structures and, correspondingly, restricts the upper limit of operating voltages for the electrocaloric applications has been determined.

中文翻译：

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多层0.55Pb–Mg 1/3 Nb 2/3 O 3 –0.45PbSc 1/2 Nb 1/2 O 3化合物的预分解状态及其诊断

摘要

材料的击穿电压的确定和材料的预击穿状态诊断是研究绝缘材料和基于它们的结构在施加外部电场时的特性的热门问题。基于铁电-弛豫0.55Pb-Mg _1/3 Nb _2/3 O ₃ –0.45-PbSc _1/2 Nb _1/2 O ₃（）的多层结构预破裂状态诊断的新有效方法考虑PMN–PSN）。该方法基于对在施加外部电场期间改变MLC表面温度的动力学的分析。一系列MLC样品已在电场E作用下进行了测试= 10–120 kV / cm，环境温度从室温到80°C。已经确定了表征PMN–PSN多层结构的预击穿状态并相应地限制电热应用的工作电压上限的临界电场。