氧化铝粉末的球磨工艺及其烧结性能研究  

Study on Ball-Milling Process and Sintering Performance of Alumina Powder

作　　者：罗祎格 胡继林[1] 罗金秋 刘琼[1] 康丁华 康文涛 

机构地区：[1]湖南人文科技学院材料与环境工程学院精细陶瓷与粉体材料湖南省重点实验室,娄底417000 [2]娄底市安地亚斯电子陶瓷有限公司,娄底417000

出　　处：《中国陶瓷》2017年第2期39-42,共4页China Ceramics

基　　金：湖南省科技计划项目(2016TP1028);娄底市科技计划项目(2014);湖南人文科技学院产学研合作引导项目(2014 CXY03);湖南省大学生研究性学习和创新性实验计划项目(湘教通[2015]269号)

摘　　要：选择三乙醇胺、六偏磷酸钠、十二烷基苯磺酸钠作为助磨剂,研究不同助磨剂及添加量对氧化铝粉末粒径的影响,并在此基础上研究球磨后Al_2O_3粉末的烧结性能。采用XRD、激光粒度分析仪、SEM等测试手段进行表征,并用万能电子材料试验机、洛氏硬度计对氧化铝陶瓷样品的力学性能进行测试分析。结果表明:当选取六偏磷酸钠作为球磨助剂,添加量为粉末质量0.3%时,氧化铝粉末助磨效果最佳,粉末球磨1 h后中位粒径(D_(50))可达1.75μm。当烧结温度为1450℃时,所制得氧化铝陶瓷综合性能最佳,其对应的抗弯强度和洛氏硬度分别为352.27 MPa和77.8 HRA。In this paper, the effects of the type and content of the milling additives on the particle size of alumina powder and the sintering performance of Al2O3 ceramics were investigated, using triethanolamine, sodium hexametaphosphate and sodium dodecyl benzene sulfonate as the milling additives. The X-ray diffractometer, laser particle size analyzer and SEM were used to analyze the phase composition, the particle size distribution and morphology of the samples. The mechanical performance was studied by universal electronic testing machine and Rockwell hardness tester. The results show that the sodium hexametaphosphate is the optimal mil/ing additive for the grinding of alumina powder, and its adding content is 0.3%. Under this condition, the median particle size （D50） of the powder is 1.75 μm. The alumina ceramics sintered in atmosphere at 1450℃ shows the best mechanical performance. The bending strength and Rockwell hardness of sintered bodies are 352.27 MPa and 77.8 HRA respectively.

关 键 词：氧化铝陶瓷 助磨剂 粉末 烧结性能 

分 类 号：TQ174.611[化学工程—陶瓷工业]