斜方硅钙石对陶瓷化硅橡胶成瓷性能的影响  

Effect of Kilchoanite on Ceramization Properties of Ceramizable Silicone Rubber

作　　者：李鹏虎 唐红川 刘怀东 李成磊 金海云[1] 高乃奎[1] LI Penghu;TANG Hongchuan;LIU Huaidong;LI Chenglei;JIN Haiyun;GAO Naikui(State Key Laboratory of Electrical Insulation and Power Equipment,Xi′an Jiaotong University,Xi′an 710049,China;Electric Power Research Institute of State Grid Chongqing Electric Power Company,Chongqing 401123,China;Maintenance Branch Company,State Grid Jiangsu Electric Power Co.,Ltd.,Nanjing 211102,China)

机构地区：[1]西安交通大学电力设备电气绝缘国家重点实验室,陕西西安710049 [2]国网重庆市电力公司电力科学研究院,重庆401123 [3]国网江苏省电力有限公司检修分公司,江苏南京211102

出　　处：《绝缘材料》2021年第12期22-27,共6页Insulating Materials

摘　　要：以斜方硅钙石为成瓷填料,低熔点玻璃粉为助熔剂,纳米二氧化硅(SiO_(2))为补强剂,制备了陶瓷化硅橡胶复合材料,研究了斜方硅钙石的含量和粒径对复合材料拉伸性能的影响。将复合材料在1000℃烧结得到陶瓷试样,并观察陶瓷试样断面的显微结构,通过XRD分析了烧结后陶瓷试样的晶相变化,测量了陶瓷试样的线性收缩率和弯曲强度。结果表明:同一粒径的斜方硅钙石含量的增加会降低复合材料的拉伸强度同时提高断裂伸长率,同一含量下小粒径的斜方硅钙石有利于提高复合材料的拉伸强度。斜方硅钙石的含量过多或过少都会降低烧结后陶瓷试样的弯曲强度和致密度,而减小斜方硅钙石的粒径有利于提高陶瓷试样的弯曲强度,但同时也会增大线性收缩率。通过调整斜方硅钙石的含量和粒径,陶瓷试样的弯曲强度最高可达58.57 MPa。Ceramizable silicone rubber composites were prepared by using kilchoanite as ceramic filler,glass frit as flux,and nano silica as reinforcing agent.The effect of the content and size of kilchoanite on the tensile properties of the composites was studied.The ceramic specimens were obtained by sintering the composites at 1000℃,and then the microstructure of its fracture surface was observed.The phase change of ceramic specimens was analyzed by X-ray diffraction,and its linear contraction and flexural strength were measured.The results show that the increase of the kilchoanite with the same particle size can reduce the tensile strength of the composites,while increase the elongation at break.Under the same content,the kilchoanite with a smaller size can improve the tensile strength of the composites.When the content of kilchoanite is too high or too low,the flexural strength and density of the ceramic specimens decrease.With the decrease of the size of kilchoanite,the flexural strength of the ceramic specimens increases,while the linear contraction also increases.The maximum flexural strength of the ceramic specimens can reach to 58.57 MPa by changing the content and size of kilchoanite.

关 键 词：陶瓷化硅橡胶 耐火材料 斜方硅钙石 成瓷性能 显微形貌 

分 类 号：TM215[一般工业技术—材料科学与工程]