硼砂与尿素在N2气氛下合成六方氮化硼的工艺  

Synthesis of h-BN Particles with Borax and Urea under N_2 Atmosphere

作　　者：赵凯[1,2] 孙苒荻[2] 朱高远[2] 张红玲[2] 张炳烛[1] 徐红彬[2] 张懿[2] ZHAO Kai SUN Ran-di ZHU Gao-yuan ZHANG Hong-ling ZHANG Bing-zhu XU Hong-bin ZHANG Yi(Col. Chem. Pharm. Eng., Hebei University of Science and Technology, Shijiazhuang, Hebei 050018, China National Eng. Lab. Hydrometall. Cleaner Production Technol., Key Lab. Green Process ＆ Eng., CAS, Beijing 100190, China)

机构地区：[1]河北科技大学化学与制药工程学院,河北石家庄050018 [2]中国科学院过程工程研究所湿法冶金清洁生产技术国家工程实验室,绿色过程与工程重点实验室,北京100190

出　　处：《过程工程学报》2016年第5期870-875,共6页The Chinese Journal of Process Engineering

基　　金：国家重点基础研究发展规划(973)资助项目(编号:2013CB632600)

摘　　要：以硼砂、尿素为原料,采用改进的硼砂-尿素法,在N2气氛下合成六方氮化硼（h-BN）,考察了焙烧温度、保温时间、硼砂与尿素摩尔比对氮化硼产率、纯度及形貌的影响,对产品进行了表征.结果表明,合成六方氮化硼的最佳工艺条件为：硼砂/尿素摩尔比1：4、焙烧温度1 300℃、保温时间4 h.该条件下氮化硼产率约为47%,纯度达98%,单片直径300-500 nm,粒度约为4μm,比表面积约为13 m^2/g.Hexagonal boron nitride （h-BN） was prepared under N2 atmosphere using improved borax-urea method. The effects of roasting temperature, soaking time, molar ratio of borax to urea on h-BN yield, purity and morphology were studied. Samples prepared under different conditions were analyzed. The results indicated that the optimum technological conditions for the synthesis of h-BN were roasting temperature of 1300 ℃, keeping time of 2-4 h, molar ratio of borax to urea of 1：4. Under the above conditions, the yield of h-BN was about 47% and the purity reached 98%. Moreover, the h-BN product with a particle size of 3.90 μm composed of single particle diameter of 300-500 nm and BET specific surface area of 13 m^2/g were obtained.

关 键 词：硼砂 尿素 六方氮化硼 工艺 表征 

分 类 号：TQ174[化学工程—陶瓷工业]