Al_2O_3包覆SrSO_4纳米复合粉体的制备与表征  

Preparation and Characterization of Al_2O_3-coated SrSO_4 Nanocomposite Powders

作　　者：李玉峰[1] 欧阳家虎[1] 钟继勇[1] 周玉[1] 

机构地区：[1]哈尔滨工业大学材料科学系特种陶瓷研究所,哈尔滨150001

出　　处：《人工晶体学报》2009年第S1期21-24,共4页Journal of Synthetic Crystals

基　　金：国家自然科学基金项目(No.50572020);国家863计划项目(No.2006AA03Z537);教育部新世纪优秀人才支持计划项目(No.NCET-06-0339)

摘　　要：采用直接沉淀-超临界流体干燥方法合成了纳米SrSO4粉体,以溶胶-凝胶法对其表面进行包覆Al(OH)3凝胶的处理,经煅烧后制备出Al2O3包覆SrSO4纳米复合粉体。通过XRD、TEM、SEM等对不同工艺条件下制备的纳米复合粉体的表面形貌和特性进行了研究。研究表明:当Al3+的浓度为0.1 mol/L、pH值为8时,可以获得好的氧化铝前驱体包覆SrSO4纳米复合粉体,经700℃煅烧3 h后获得了均匀、致密的Al2O3包覆SrSO4纳米复合粉体。Direct chemical precipitation-supercritical fluid drying method were synthesized using sol-gel method,Al2O3-coated SrSO4 nanocomposite powders were prepared by coating a gel layer of Al(OH)3 on the surface of nanoscale SrSO4 powders.Surface morphologies and characterization of the nanocomposite powders were investigated by means of XRD,TEM and SEM.The stable and uniform Al2O3-coated SrSO4 nanocomposite powders can be obtained at a Al3+ concentration of 0.1 mol/L,and a pH value of 8.0 followed by calcining at 700 ℃ for 3 h.

关 键 词：溶胶-凝胶法 包覆 氧化铝 纳米SrSO4 复合粉体 

分 类 号：TB383.1[一般工业技术—材料科学与工程]