Fabrication of flexible dielectric materials with improved mechanical properties using silicone rubber and Cu-Al-Zn alloy

Document Type : Original Article


1 Department of Polymers and Pigments, National Research Center, Cairo, Egypt

2 Solid State Physics Department, Metal Physics Laboratory, National Research Centre, Dokki, Giza, Egypt

3 Department of Microwave Physics and Dielectrics, National Research Center, Cairo, Egypt


Dielectric polymer composites have unusual properties that have significantly increased in a wide variety of applications. However, shape memory materials, which are a significant part of the category of smart materials, are substances that possess specific characteristics, namely, shape memory affect (SME) and pseudo -elasticity. SME has been examined using thermo-mechanical techniques. In this approach, silicone rubber (SiR) composites using Cu-Al-Zn alloy as fillers may be able to achieve a high permittivity and low dielectric loss. The purpose of this study is to explore the effect of Cu-Al-Zn alloy in particle form on the physical properties of silicone rubber. The results disclosed an improvement in stiffness and elasticity as well as dielectric properties of silicone rubber/Cu-Al-Zn alloy composites. The results showed lower hysteresis at higher Cu-Al-Zn alloy content. Further, the values of permittivity ε' and dielectric loss ε″ of the investigated composite were in case of using Cu-Al-Zn alloy. Besides, the SiR composites containing Cu-Al-Zn alloy have a promising insulating performance and can be used in electric insulation applications. Additionally, the values of conductivity of the SiR/ Cu-Al-Zn alloy composites vary from 10-13 to ~10-9 S cm–1. This value is sufficient for these composites to exhibit electrostatic dissipation behaviour


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