在Mg-hBN体系中水对cBN晶体合成的影响  

The Effect of Water on the Synthesis of Cubic Boron Nitride Crystal in the System of Mg-hBN

作　　者：张铁臣[1] 望贤成[1] 杜永惠[1] 苏作朋[1] 邹广田[1] 

机构地区：[1]吉林大学超硬材料国家重点实验室,吉林长春130023

出　　处：《高压物理学报》2004年第1期17-20,共4页Chinese Journal of High Pressure Physics

摘　　要：研究了4.5～5.5GPa、1400～1800℃条件下,两种形态水———自由水与束缚水对在Mg hBN体系中合成cBN晶体的影响。结果表明:水的形态与添加水的量对合成cBN晶体的颜色、成核率及生长条件有重要影响。自由水可抑制cBN晶体的成核数量,而束缚水可以改变cBN晶体的颜色并降低合成温度。Synthesis of cubic boron nitride(cBN) crystal in the system of Mg-hBN with water,in the form of free or bonded,was investigated under the pressure and temperature of 4.5～5.5 GPa and 1400～1800 ℃.Results indicate that the form and the amount of water have important effect on the colour,the nucleation rate and the growth of cubic boron nitride crystals.Free water can depress the number of nucleus,and bonded water will change the colour and decrease the temperature for the synthesis of cBN crystals.

关 键 词：立方氮化硼 自由水 束缚水 氮化硼晶体 触媒材料 X射线衍射分析 

分 类 号：O78[理学—晶体学] O521