纳米晶添加氧化铝粉体的低温烧结研究  

Low Temperature Sintering of Bimodal Alumina Powder Mixtures with Nanocrystalline Component

作　　者：李江[1] 潘裕柏[1] 宁金威[1] 黄莉萍[1] 郭景坤[1] 

机构地区：[1]中国科学院上海硅酸盐研究所高性能陶瓷与超微结构国家重点实验室,上海200050

出　　处：《无机材料学报》2003年第6期1192-1198,共7页Journal of Inorganic Materials

基　　金：国家973资助项目(G2000067204-2);高性能陶瓷与超微结构国家重点实验室资助项目(2310000)

摘　　要：以湿化学法制备的纳米α-Al_2O_3粉体作为添加剂,MgO和SiO_2为烧结助剂,对商用γ-Al_2O_3粉体预处理后,采用无压烧结工艺,有效的降低了烧结温度.在1450℃制备了高性能的氧化铝陶瓷,并对添加α-Al_2O_3纳米晶的作用机理进行了研究.Nanocrystalline alpha-Al2O3 powder was prepared by a wet-chemical method calcining the dry NH4Al(OH)(2)CO3 precursor synthesized from NH4Al(SO4)(2) and NH4HCO3. Alumina ceramics were fabricated by pressureless sintering process at 1450degreesC from bimodal alumina powder mixtures with the prepared nanocrystalline component using MgO and SiO2 as additives. The effect of nanocrystalline alpha-Al2O3 component on alumina ceramics was also studied. The materials fabricated have better mechanical properties.

关 键 词：氧化铝陶瓷 低温烧结 湿化学法 纳米晶 

分 类 号：TQ174[化学工程—陶瓷工业]