Synthesis of Cubic Boron Nitride by the Reaction of Li 3 N and B 2 O 3
Synthesis of Cubic Boron Nitride by the Reaction of Li 3 N and B 2 O 3
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Li 3 N与B 2 O 3 反应合成立方氮化硼
DOI：
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发表时间：
2006
期刊：
影响因子：
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通讯作者：
Zhang Tiechen
中科院分区：
文献类型：
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作者：
Su Zuo;Duan Yong;Ji Xiao;Yang Da;Yang Xu;Gong Xi;Zhang Tiechen
立方氮化硼是由Li 3 N和B2 O3在高压高温（4.0-5.0 GPa，1350-1500°C）下反应合成的。cBN形成的最小压力为4.0GPa。cBN形成的当前条件明显低于Li 3 N-hBN系统中Li 3BN 2和BN的共晶温度（5.5GPa，1610°C）。随着温度和压力的增加，样品中cBN的含量增加，而hBN的含量减少。最大转化率（5.0 GPa，1500°C）约为34%，高于hBN-Li 3 N体系。cBN晶体为八面体或四面体，直径约20 μm。
Cubic boron nitride is synthesized by the reaction of Li3N and B2O3 under high pressure and high temperature (4.0–5.0 GPa, 1350–1500°C). The minimum pressure of cBN formation is 4.0 GPa. The present condition of cBN formation is clearly lower than the eutectic temperature of Li3BN2 and BN in the Li3N-hBN system (5.5 GPa, 1610°C). The content of cBN in the sample increases, while the content of hBN decreases with the temperature and pressure. The maximum conversion rate (5.0 GPa, 1500°C) is about 34%, which is higher than that in the hBN-Li3N system. The cBN crystals are octahedral or tetrahedral in shape and approximately 20 μm in diameter.