Preparation and Properties of Ceramic Silicone Rubber Composites Improved by Lithium Porcelain or Borax

Ceramic silicone rubber composites were prepared through mechanical mixing method using silicone rubber blended with lithium porcelain and borax. The ceramic structures, mechanical properties and sintering properties were characterized by mechanical testing, Thermogravimetry (TG), X-ray diffraction(XRD) and Scanning Electron Microscopy(SEM). The properties of ceramic silicone rubber composites which influenced by lithium porcelain and borax were investigated. Results showed that the incorporation of lithium porcelain and borax improved the mechanical properties of silicone rubber composites, reduced the initial decomposition temperature of ceramic silicone rubber composites and accelerated the sintering reaction process. When the mass ratio of the added lithium porcelain to silicone rubber was 5:100, the comprehensive mechanical properties of silicone rubber composites were the best. The tensile strength, elongation at break and tear strength of the composites were increased by 15.6%, 34.8% and 2.3%, respectively. The ceramic silicone rubber composites with lithium porcelain were sintered to form a homogeneous ceramic, which have better sintering properties than ceramic silicone rubber composites with borax.