氮化硼晶须氮化工艺及其生长机理(英文)  

Nitriding Process and Growth Mechanism of Boron Nitride Whiskers

作　　者：赵林[1] 魏红康[1] 谢志鹏[2] 汪长安[2] 

机构地区：[1]景德镇陶瓷学院材料科学与工程学院,景德镇333403 [2]清华大学新型陶瓷与精细工艺国家重点实验室,北京100084

出　　处：《硅酸盐学报》2014年第7期831-835,共5页Journal of The Chinese Ceramic Society

基　　金：国家自然科学基金(51202097,51102120);江西省自然科学基金(20132BAB216008);辽宁省镁资源与镁质材料工程技术研究中心开放基金(USTLKEC201410);清华大学新型陶瓷与精细工艺国家重点实验室开放基金;景德镇市科学技术局科技计划项目(2012JGY-1-49)

摘　　要：通过氮化由三聚氰胺和硼酸为原料制备的氮化硼晶须前驱体制备出氮化硼晶须,并采用扫描电子显微镜、X射线衍射仪、红外光谱仪和热分析仪对氮化硼晶须氮化工艺进行研究,同时对氮化硼晶须的生长机理进行探讨。结果表明:当升温速率5℃/min、氮气流量0.2L/min、氮化温度1 700℃、保温时间30min时可制备出长径比高、性能优良的氮化硼晶须。氮化硼晶须的生长机理可归纳为前驱体脱水、聚合反应、无机化反应和晶相转变等过程。Boron nitride （ BN） whiskers were prepared v/a nitriding the whisker precursors, which were synthesized v/a the re- action of melamine （C3 N6 H6 } and boric acid （H3 BO3 }. The ni.triding process of BN whiskers was investigated by scanning e- lectron microscopy, X-ray diffraction, Fourier transformation infrared spectroscopy and thermogravimetry-differential scanning calorimetry, respectively. The growth mechanism of boron nitride whiskers was discussed. The results show that the BN whiskers with high aspect ratios and better property can be prepared at a heating rate of 5 ℃/min, a nitrogen flow rate of 0. 2 L/min, a nitriding temperature of 1 700 ℃ and holding time of 30 min. The growth mechanism of boron nitride whiskers can in- volve the dehydration, polymerization, inorganic reaction and crystal transformation.

关 键 词：氮化硼 晶须 氮化 生长机理 

分 类 号：TB32[一般工业技术—材料科学与工程]