新疆库尔勒红柱石的结构与性能分析  

Analysis of Structure and Properties of Korla's Andalusite in Xinjiang

作　　者：吴建锋[1] 冷光辉[1] 华全[1] 倪扬[1] 徐晓虹[1] 赵曌[1] 

机构地区：[1]武汉理工大学材料科学与工程学院,武汉430070

出　　处：《武汉理工大学学报》2011年第11期14-18,共5页Journal of Wuhan University of Technology

基　　金：国家重点基础研究发展计划"973"项目(2010CB227105)

摘　　要：系统研究了新疆库尔勒红柱石的理化性能及高温烧成性能。采用XRF、XRD、SEM、TG-DTA等测试方法研究了其化学成分、物相组成、微观结构及原料在烧成过程中的物理化学变化。通过添加少量高温溶剂,采用半干压成型方法制备样品,研究了红柱石高温烧成性能。研究表明,原料中Al2O3含量为50.87%,SiO2含量为43.25%,主晶相为红柱石晶体、石英等,样品的烧成温度范围较宽(1 300～1 540℃),高温体积稳定性较好(烧成线收缩在1%左右),抗折强度在75MPa左右,吸水率在7.80%～17.25%之间,气孔率在17.89%～33.42%之间,600℃的导热系数为1.21W/(m.K),比热容为0.65J/(g.K),热扩散系数为0.84×10-2 cm2/s,样品的主晶相为莫来石。结果显示,新疆库尔勒红柱石为一种优良的陶瓷原料,适合制备使用温度高、高温体积性能稳定、抗热震性能好的工业陶瓷制品。The physical and chemical properties and high temperature performance of Korla andalusite were systematically studied in this article.The chemical composition,phase composition,microstructure,and physical and chemical changes in firing process of raw materials were analyzed by testing technology such as XRF,XRD,SEM,TG-DTA and so on.The samples made by semi-dry pressing method with adding a little high-temperature flux.High temperature performances of samples were studied.The research shows that the content of Al2O3 is about 50.87%,SiO2 is about 43.25%,and the main phase are andalusite and quartz in raw materials.Range of the fire temperature of samples is wide（1 300~1 540 ℃）,and bending strength is about 75 MPa,high temperature volume stability is good（firing shrinkage is about 1%）,water absorption is between 7.80% and 17.25%,porosity is between 17.89% and 33.42%.Thermal conductivity is 1.21 W/（m·K）,heat capacity is 0.65 J/（g·K）,thermal diffusivity.of samples at 600 ℃ is 0.84×10^-2 cm^2/s.The results indicated that Korla andalusite is a good ceramic raw materials,it is fit for making the ceramic which have good high temperature performance and thermal shock resistance.

关 键 词：新疆库尔勒 红柱石 组成结构 性能 陶瓷 

分 类 号：TB32[一般工业技术—材料科学与工程]