Electrocaloric effect (ECE) as well as field induced pyroelectric and piezoelectric effects were investigated in relaxor ceramics 0.84 PbMg1/3Nb2/3O3–0.14 PbTiO3–0.02 SrTiO3. Dielectric and elastic properties of the solid solution were also studied. To improve the accuracy and reliability of the results obtained, the electrocaloric temperature change δT was measured both by the well-known quasi-adiabatic technique with a contact temperature sensor and by the radiometric mid Infrared technique developed by the authors. The contribution of the secondary pyroelectric effect to the total pyroelectric and ECE was studied in detail. The effect of the induced piezoelectricity on the range of the temperature stability of pyroelectric and electrocaloric responses was shown. The resulting combination of material parameters at reasonable operating temperatures and electric fields, including both the possibility of increasing δT and the existence of its temperature-independent range from 10 to 80 °C, predestines the solid solution as a promising electrocaloric material.

中文翻译：

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铌酸镁铅基陶瓷中电热效应与伴随效应的相互关系

在弛豫陶瓷 0.84 PbMg1/3Nb2/3O3–0.14 PbTiO3–0.02 SrTiO3 中研究了电热效应 (ECE) 以及场致热释电和压电效应。还研究了固溶体的介电和弹性特性。为了提高所得结果的准确性和可靠性，电热温度变化 δT 是通过众所周知的带有接触温度传感器的准绝热技术和作者开发的辐射测量中红外技术来测量的。详细研究了二次热电效应对总热电和ECE的贡献。显示了感应压电对热电和电热响应的温度稳定性范围的影响。