水热法制备钴铝尖晶石型纳米晶液体陶瓷颜料  

Synthesis of Cobalt-Aluminate Nanocrystallites by Hydrothermal Process

作　　者：黄剑锋[1] 王雅琴[1] 李春文 曹丽云[1] 

机构地区：[1]教育部轻化工助剂化学与技术重点实验室,陕西科技大学西安710021 [2]佛山市三水新色全化工有限公司,广东佛山528000

出　　处：《陶瓷》2012年第1期45-47,共3页Ceramics

摘　　要：以硝酸钴、硝酸铝和氢氧化钠为主要原料,采用水热法通过一系列正交对比实验制备了较纯净、结晶完整,直径为100nm左右且分散性良好的CoAl2O4纳米晶。用X射线衍射仪(XRD)、透射电子显微镜(TEM)及X射线能量色散谱仪(EDS)测定了粉体的晶相组成、微观形貌和元素组成。实验结果表明:水热法制备CoAl2O4纳米晶的最佳工艺条件为水热温度T=200℃、水热时间t=16h、前驱液摩尔浓度C=0.25mol·L-1、pH值=11、Al3+:Co2+=4:1(摩尔比)。球形的CoAl2O4粉体是单晶且沿[311]方向取向生长。Cobalt- aluminate nanocrystallites were synthesized by hydrothermal method using Co（ NOa ） 2 · 6 He O, AI（ NO3） 3 · 9 H2 O and NaOH as raw materials. The spinel structured CoAl2O4 nano--powder with high purity, crystallization integrity, fine grain size （100 nm）, and perfect dispersity were obtained through a series of orthogonal experiment. The phase composition, micro--structure and consisting of elements were characterized by XRD, TEM and EDS. Results show that the optimum process conditions for preparing CoAlzO4 nanocrystallites were T=200 ~C （hydrothermal temperature）, t= 16 h （hydrothermal time）, C=0.25 tool · L ^-1 （mol concentration of precursor） , pH=ll（pHvalueofprecursor）,A1a＋ ： Co2＋=4 ： 1（molratioofAP＋ = Co2＋）. The as--prepared powders possess spherical structure are single crystals with preferred orientation along the [311] direction.

关 键 词：水热法 正交实验 尖晶石结构 CoAl2O4纳米晶 

分 类 号：TQ174.64[化学工程—陶瓷工业]