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首页> 外文期刊>Japanese Journal of Applied Physics. Part 1, Regular Papers, Brief Communications & Review Papers >Synthesis of Cubic and Hexagonal Boron Nitrides by Using Ni Solvent under High Pressure
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Synthesis of Cubic and Hexagonal Boron Nitrides by Using Ni Solvent under High Pressure

机译：高压镍溶剂合成立方六方氮化硼。

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摘要

The reaction boundary between boron nitride (BN) and nickel (Ni) metal was studied at high pressures (HP) of 4.5-6 GPa in the high temperature (HT) 1300-1900℃ region. It can be seen that Ni dissolves BN followed by the precipitation of BN crystals under HP and HT. Full conversion from hexagonal BN (hBN) to cubic BN (cBN) took place above 6 GPa and 1700℃ while cBN started to crystallize from 5.5 GPa and 1500℃. Near the reaction boundary in the cBN formed region, hBN also spontaneously recrystallized. Although crystallized cBN exhibited irregularity in shape, the recrystallized hBN exhibited crystalline facets and intrinsic optical characteristics. It was found that high quality hBN crystals can be synthesized in the Ni-BN system under HP and HT.
机译：研究了氮化硼（BN）与镍（Ni）金属在高温（HT）1300-1900℃下在高压（HP）为4.5-6 GPa时的反应边界。可以看出，Ni在HP和HT下溶解BN，然后沉淀BN晶体。从六方氮化硼（hBN）到立方氮化硼（cBN）的完全转化发生在6 GPa和1700℃以上，而cBN在5.5 GPa和1500℃开始结晶。在cBN形成区域的反应边界附近，hBN也自发地重结晶。尽管结晶的cBN显示出不规则形状，但是重结晶的hBN显示出晶面和固有的光学特性。发现在HP和HT下，Ni-BN体系中可以合成高质量的hBN晶体。

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