Ceramifiable and mechanical properties of silicone rubber foam composite with frit and high silica glass fiber

4th International Conference on Applied Materials and Manufacturing Technology

材料科学;机械制造

Song, J.Q.^1 ; Huang, Z.X.^1 ; Qin, Y.^1 ; Yang, G.Y.^1 ; Wang, X.^1

School of Materials Science and Engineering, Wuhan University of Technology, Wuhan

430070, China^1

关键词: Bridged structures;    Ceramic residue;    Crystalline phase;    High silica glass;    High temperature;    Micromorphologies;    Pyrolysis residue;    Vulcanizing agents;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/423/1/012168/pdf
DOI  :  10.1088/1757-899X/423/1/012168

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

In this paper, ceramifiable silicone rubber foam composite was prepared by silicone rubber, fumed SiO2, talc, frit, high silica glass fiber, foaming and vulcanizing agents. Thermal property, micromorphology, phase transformation and compressive strength of pyrolysis residues at different temperatures were discussed. Thermogravimetric analysis (TGA) results indicated that the amount of ceramic residues increased from 34.5% to 41.1% at 1000 °C with the increase of frit content, whereas T5 and Tmax decreased by 43°C and 103°C, respectively. SEM images showed that pore size became well-distributed by adding frits to the silicone rubber. And after pyrolysis at 1000°C, bridged structure was formed well, which made the structure of residues be coherent and integrated. XRD tests indicated that new crystalline phase, MgSiO3, was appeared at above 1000°C. The effect of frit on compressive strength of composite at room temperature was little, but there was a great improvement after being treated at high temperature, especially at 1000°C.