铝粉对可陶瓷化硅橡胶复合材料及其陶瓷体性能的影响  

Effect of Aluminum Powder on the Properties of Ceramizable Silicone Rubber Composites and Their Ceramic Bodies

作　　者：母汶汶 赵孙策 肖顺红 陈福德 陈芳 马寒冰[1] MU Wenwen;ZHAO Sunce;XIAO Shunhong;CHEN Fude;CHEN Fang;MA Hanbing(School of Materials Science and Engineering,Southwest University of Science and Technology,Mianyang 621010,Sichuan,China)

机构地区：[1]西南科技大学材料科学与工程学院,四川绵阳621010

出　　处：《西南科技大学学报》2022年第1期23-29,79,共8页Journal of Southwest University of Science and Technology

基　　金：四川省科技厅项目(2020YFG0173);大学生创新创业训练计划项目(S202110619084)。

摘　　要：将不同量的铝粉和硅橡胶/硅灰石进行共混,制备出一种可陶瓷化硅橡胶复合材料,并在1000℃下将其烧结形成陶瓷体。采用万能实验机测试了材料的力学性能,采用热重分析仪(TGA)分析了复合材料的热性能,采用扫描电镜(SEM)观察陶瓷体形貌及脆断面的结构,采用X射线衍射仪(XRD)分析了陶瓷体的晶相变化。结果表明:与不添加铝粉的材料相比,在添加质量分数15%的铝粉后,1500℃时复合材料残留率为76.7%,提升了9.1%,但添加铝粉对复合材料的力学性能影响较小;将复合材料烧成陶瓷体后内部相对致密,弯曲断裂峰值力达到6.00 N,相比不添加铝粉时提升了161%。添加铝粉能够有效改善可陶瓷化硅橡胶的耐热性并提高成瓷以后陶瓷体的力学强度。In this paper,different amounts of aluminum powder and silicone rubber/wollastonite were blended to prepare a ceramizable silicone rubber composite,and the ceramic body of the composite was formed by sintering at 1000℃.The universal experimental machine was used to test the mechanical properties of the materials.Thermogravimetric analysis(TGA)was used to analyze the thermal properties of the composite materials.Scanning electron microscope(SEM)was used to observe the ceramic body morphology and brittle section structure.X-ray diffraction(XRD)was used to analyze the crystal phase change of the ceramic body.The results show that when 15%aluminum powder is added,the residual rate of the composite material at 1500℃is 76.7%,which is an increase of 9.1%.However,the addition of aluminum powder has little effect on the mechanical properties of the composite material.After the composite is sintered into a ceramic body,the interior is relatively dense,and the bending fracture peak force reaches 6.00 N,which is an increase of 161%compared with the case without aluminum powder.It can be concluded that the introduction of aluminum powder can effectively improve the thermal stability of the ceramic silicone rubber and enhance the mechanical strength of the ceramic body.

关 键 词：可陶瓷化硅橡胶 铝粉 硅灰石 陶瓷体 热稳定性 

分 类 号：TQ333.93[化学工程—橡胶工业]