【作者】 李凯； 姜海辉； 廉刚； 陆希峰； 赖泽锋； 朱玲玲； 王琪珑； 崔得良；

【Author】 LI Kai, JIANG Hai-hu, LIAN Gang, LU Xi-feng, LAI Ze-feng, ZHU Ling-ling , WANG Qi-long, CUI De-Hang (State Key Lab. of Crystal Materials, Shandong University, Ji’nan 250100,China; School of Chemistry & Chemical Engineering, Shandong University, Ji’nan 250100,China; Shandong Institute of Light Industry, Ji’nan 250100, China)

【机构】 山东大学晶体材料国家重点实验室； 山东大学化学与化工学院；

【摘要】 研究了用选相原位方法合成立方氮化硼 (cBN)过程中升降温速度和反应体系的均匀性对产物物相的影响,利用X射线衍射(XRD)、红外吸收光谱 (FTIR)、透射电子显微镜(TEM)和选区电子衍射 (SAED)对样品进行了表征。结果表明:当反应体系以较慢的速度升温和降温(0.5℃／min)时,可以合成近纯相的cBN;另外,适当加快搅拌速度可以提高反应体系的均匀性,同样对合成cBN有利。更多还原

【Abstract】 The effect of temperature raising/cooling rate and uniformity of the reacting mixture on the phases content in BN samples, which was prepared by phase-selective hydrothermal synthesis method, was investigated. The samples were characterized by X-ray diffraction (XRD), Fourier transformation infrared (FTIR) absorption spectra, transmission electron microscopy (TEM) and selective area electron diffraction (SAED). The results indicated that cubic boron nitride (cBN) could be prepared when the temperature raising/cooling rate was as low as 0. 5℃/min. In addition, moderate stirring speed (300 r/min) was also in favor of synthesizing cBN.更多还原