摘要
采用醇盐水解工艺结合碳热氮化还原法进行纳米AlN 粉末的制备.以异丙醇铝、果糖、无水乙醇为原料,制备出透明的凝胶,干燥后得到分子水平混合的前驱体,在1450 ℃经碳热氮化还原法制备出单相AlN 纳米粉末.系统研究了前躯体形成机制,以及碳热氮化还原的温度和时间、C/Al摩尔比、凝胶温度等因素对合成粉体的影响. 采用XRD、TGGDSC 和SEM 对合成产物的特性进行了分析和表征.通过优化工艺,制得类球形的AlN 粉末颗粒,其颗粒大小为30-90nm.
In this paper,nano Al N particles were prepared by combining alkoxide hydrolysis with carbothermal reduction and nitridation method. Using aluminum isopropoxide,fructose and ethanol as starting materials,a transparent gel was prepared. Then a molecular level mixing precursor was obtained under drying. Single-phase Al N particles were synthesized through carbothermal reduction and nitridation at 1 450 ℃. The forming mechanism of the precursor was studied,as well as the effect of gelation temperature,C / Al ratio,calcination temperature and time on the synthesis of Al N. XRD,TG-DSC and SEM were utilized to characterize the synthesized powder. Through optimizing process,equiaxed Al N particles were obtained with an diameter ranging from
出处
《功能材料》
EI
CAS
CSCD
北大核心
2015年第6期6120-6123,共4页
Journal of Functional Materials
基金
国家自然科学基金资助项目(51178017)
