Fabrication of β-boron by chemical-reaction and melt-quenching methods at high pressures
Fabrication of β-boron by chemical-reaction and melt-quenching methods at high pressures
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DOI：
10.1557/jmr.2004.0224
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发表时间：
2004-06-01
影响因子：
2.7
通讯作者：
Popova, S
中科院分区：
文献类型：
--
作者：
Brazlikin, VV;Taniguichi, T;Popova, S
研究了硼的结晶与熔体冷却的关系，以及氧化硼与镁在7.7 Gpa压力下发生化学反应生成的硼。熔体的结晶和化学反应生成了菱形的P-B相，这证明了该相在直至熔化曲线的所有温度下都是稳定的，压力范围最高可达7.7 GPa.在7.7 GPa时的熔化温度T-m为2480+/-50K，这表明熔化曲线有一个轻微的正斜率，约为10K/GPa.化学反应和随后以大约1K/S的速度从熔体冷却的结果是形成形状良好的硼单晶，表明液体的粘度很低。
The dependence of boron crystallization upon melt cooling has been investigated, as well as boron formation as a result of the chemical reaction of boron oxide with magnesium at a pressure of 7.7 GPa. Crystallization from the melt and the chemical reaction produce a rhombohedral P-boron phase, which is evidence of this phase stability at all temperatures up to the melting curve within the pressure range up to 7.7 GPa. The melting temperature T-m at 7.7 GPa is 2480 +/- 50 K, which points to a slight positive slope of the melting curve equal to approximately 10 K/GPa. Well-shaped single crystals of boron are formed as a result of the chemical reaction and the subsequent cooling from the melt at a rate of approximately 1 K/s, indicating low viscosity of the liquid phase.