Synthesis of Boron Nitride by Self‐Propagating Reactions at High Pressure
Synthesis of Boron Nitride by Self‐Propagating Reactions at High Pressure
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DOI：
10.1111/j.1151-2916.1996.tb09056.x
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发表时间：
2005-08
影响因子：
3.9
通讯作者：
V. Solozhenko;V. Turkevich;G. Will
中科院分区：
文献类型：
--
作者：
V. Solozhenko;V. Turkevich;G. Will
本文研究了立方氮化硼（cBN）热力学稳定范围内的各种p、T条件下LiBF_4和Li_3N自蔓延反应生成BN的特性。氮化硼主要以高度有序的hBN（1700-2100 K）、介石墨BN（2200-3000 K）或乱层BN（>3000 K）的形式结晶。立方氮化硼是从BN-Li_3 N系统的亚稳共晶液体中析出的，产率较低（高达14体积%）。这些结果进一步证明了BN相在高压下形成的另一种亚稳行为。
Peculiarities of the formation of BN in a self-propagating reaction between LiBF4 and Li3N have been studied under a wide range of p,T conditions within the region of thermodynamic stability of cBN. Boron nitride crystallized mainly in the form of highly ordered hBN (1700–2100 K), of mesographitic BN (2200–3000 K), or of turbostratic BN (>3000 K). Cubic boron nitride was obtained with a low yield (up to 14 vol%) as a result of precipitation from the metastable eutectic liquid in the BN-Li3N system. These results give further evidence for an alternative metastable behavior in the BN phase formation under high pressures.