溶胶-凝胶超临界干燥法制备纳米氧化镍气凝胶  

The Preparation of NiO Aerogel by Sol-gel Supercritical Fluid Drying Method

作　　者：刘秀然[1] 李轩科[1] 沈士德[1] 

机构地区：[1]武汉科技大学,湖北武汉430081

出　　处：《武汉科技大学学报》2001年第2期155-156,共2页Journal of Wuhan University of Science and Technology

摘　　要：以硝酸镍和氢氧化钠为原料 ,采用溶胶 凝胶超临界流体干燥法制备了氧化镍气凝胶超细粉末。并采用TEM和XRD等测试手段对所制得的气凝胶粉末的表面形貌和结构进行了表征。结果表明 ,气凝胶具有较疏松的外观结构和良好的流动性 ,它由球形以及晶须状的、分散性较好的立方相氧化镍粒子组成 ,其颗粒尺寸以及晶须直径约为 310nm。Using Ni(NO 3) 2 and NaOH as starting materials,the ultrafine powders of NiO aerogel were prepared by sol gel supercritical fluid drying method.The morphology and structure of NiO aerogel were characterized by XRD and TEM analyses.The results show that the NiO aerogel with loose appearance structure and good fluidity is composed of spherical,whiskered,well dispersed and cubic phase NiO particles.The particle sizes and the diameter of whiskers for NiO aerogel are 3~10nm

关 键 词：氧化镍 超细粒子 超临界流体干燥 溶胶-凝胶法 气凝胶 表面形貌 外观结构 

分 类 号：TB383[一般工业技术—材料科学与工程] O648.1[理学—物理化学]