【作者】 郝霄鹏； 崔得良； 白玉俊； 史桂霞； 殷永泉； 徐现刚； 蒋民华；

【Author】 HAO Xiao-peng;CUI De-liang;Bai Yu-jun;SHI Gui-xia;YIN Yong-quan;XU Xian-gang;JIANG Min-hua State Key Laboratory of Crystal Materials, Shandong University,Jinan, 250100, China Mechanical Department,Shandong University of Science and Technology Jinan, 25006, China

【机构】 山东大学晶体材料国家重点实验室；

【摘要】 以Li₃N和BBr₃为原料,利用低温苯热合成方法制备了六方BN纳米晶,并对样品的性质进行了表征。X射线粉末衍射（XRD）和透射电子显微镜（TEM）测试结果表明:在250℃时用苯热方法可以合成出粒度均匀、形状规则、平均粒度为1nm的六方氮化硼纳米晶;另外,热分析结果表明:当BN纳米晶的粒度由通常的微米量级降低到1.0nm时,熔点由原来的2967℃降低到1240℃;从傅里叶红外光谱（FTIR）可知,样品中除含有六方氮化硼外,还含有少量的立方氯化硼;X射线光电子能谱（XPS）分析表明,样品的平均组成为BN_1.1。更多还原

【Abstract】 Hexagonal BN（hBN） nanocrystals were synthesized by reacting BBr₃ and Li₃N at low temperature benzenethermal condition. The sample was characterized by X-ray powder diffraction （XRD）, Fourier transformation infraredspectroscopy （FTIR） and X-ray photoelectron spectra analysis （XPS）measurements. The XRD and FTIR results showthat hBN nanocrystals about 1.0nm can be obtained which is uniform in granularity and regular shape at 250℃. Inaddition, thermal analysis of hexagonal BN nanocrystals shows that when the average size reduced to about 1.0nm, itsmelting point decreases from 2967℃ of the bulk BN to about 1240℃.FTIR spectra indicated that hBN and cBNcoexisted in the sample, but the h BN was the dominant phase. Analysis of XPS spectra showed that the averagecomposition of the sample is about BN_1.1.更多还原