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本文研究了硅橡胶介电弹性体复合材料的热力学和热机电稳定性.考虑温度、掺杂和电致伸缩变形的耦合影响,建立介电弹性体复合材料的介电常数模型,从而构建系统的电场能,基于此耦合发展的Ogden模型研究复合材料的热力学性能和热机电稳定性性能.结果表明,当电致伸缩系数减小,或材料常数比减小,或温度增加,或唯象学参数增加,或电致伸缩系数比增加时,介电弹性体临界名义电场增加,从而热力学系统的稳定性增强.这些结论对于硅橡胶纳米复合材料的设计和制备及其应用器件研究有巨大帮助.
In this paper, the thermodynamics and thermomechanical stability of silicone rubber dielectric elastomer composites were studied. The dielectric constant model of dielectric elastomer composites was established considering the coupling effects of temperature, doping and electrostrictive deformation, The results show that when the electrostrictive coefficient decreases or the material constant ratio decreases or the temperature increases or the phenomenological parameters Increases, or the electrostrictive coefficient ratio increases, the critical electric field of the dielectric elastomer increases, and the stability of the thermodynamic system is enhanced. These conclusions are of great help to the design and fabrication of the silicone rubber nanocomposites and their application in device research.