Development of butyl rubber-rutile composites for flexible microwave substrate applications

作者：Chameswary Janardhanan; Sebastian Mailadil T^*

来源：Ceramics International, 2014, 40(5): 7439-7448.

DOI：10.1016/j.ceramint.2013.12.091

• B. Composite
• C. Thermal properties
• C. Dielectric properties
• Elastomer

Butyl rubber-micron rutile (BR/MRT) and butyl rubber-nano ruffle (BR/NRT) composites were prepared by sigma mixing. The effect of micron ruffle and nano ruffle content on dielectric properties at 1 MHz and 5 GHz were investigated. For 0.30 volume fraction (nu(f)) of micron rutile loading, the composites have attained a relative permittivity (epsilon(r)) of 8.59 and loss tangent (tan delta) of 0.0024 at 5 GHz, and for the same volume fraction of nano ruffle content, the composite showed epsilon(r) of 7.62 and tan delta of 0.0031 at 5 GHz. The thermal properties such as thermal conductivity (TC) and coefficient of thermal expansion (CTE) of both composites were studied as a function of filler loading. It is found that the nano rutile added butyl rubber composites have better thermal properties than those micron composites. The stress strain curves of both composites show the mechanical flexibility of the composites. The experimental relative permittivity and thermal conductivity of both composites were compared with theoretical models.

• 出版日期2014-6