金属陶瓷发热体中陶瓷基体的设计和制备  

Design and Preparation of Ceramic Matrix in Metal Ceramic Heater

作　　者：邓腾飞[1] 贾倩[1] DENG Tengfei JIA Qian(State Key Laboratory of Building and Silicate Materials, Wuhan University of Technology, Wuhan 430070, Hubei, Chin)

机构地区：[1]武汉理工大学硅酸盐国家重点实验室,湖北武汉430070

出　　处：《中国陶瓷工业》2016年第5期6-11,共6页China Ceramic Industry

摘　　要：以碳化硅、工业氢氧化铝、苏州土、钾长石、氧化钙为主要原料,设计了B系列配方。采用半干压成型和注凝成型两种不同的方法来制备金属陶瓷发热体基体,并确定最佳配方及制备工艺参数。以期在降低成本的同时,使其用途更加广泛。实验制备出了陶瓷基体并成功得到经二次烧成后内部镶嵌钨丝的样品。通过XRD和SEM等现代测试技术对材料的性能和微观结构进行了表征,相组成分析结果表明,样品的主晶相为碳化硅和方石英。显微结构分析表明,样品中生成了碳化硅晶粒且热导率与氧化铝陶瓷相比大大提高。In this paper, using the Si C powder, industrial Al（OH）3, Suzhou kaolin, potash feldspar and Ca O as the main raw materials, the metal ceramic heating body was prepared, and its optimum formulation and preparation process parameters were determined. In order to reduce the costs and make it more applicable, the properties and microstructure of the materials were characterized by XRD, SEM and other modern test techniques. The ceramic matrix was prepared by experiment. And the samples inlaid with tungsten wire were obtained successfully by double firing. The phase composition analysis indicated that the main phases of samples were silicon carbide and cristobalite. The study results of microstructure showed that silicon carbide is gained in the samples. Compared with the alumina ceramics, the thermal conductivity of samples isgreatly improved.

关 键 词：碳化硅 金属陶瓷发热体 热导率 微观结构 

分 类 号：TG148[一般工业技术—材料科学与工程] TQ174.1[金属学及工艺—金属材料]