Vaporization thermodynamics of MgB2 and MgB4
Vaporization thermodynamics of MgB2 and MgB4
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DOI：
10.1063/1.1471382
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发表时间：
2002-04-22
影响因子：
4
通讯作者：
Palenzona, A
中科院分区：
文献类型：
--
作者：
Brutti, S;Ciccioli, A;Palenzona, A
采用Knudsen液质谱技术研究了MgB2和MgB4在热力学条件下的汽化行为。在探测温度范围内（883-1154 K），观察到硼化镁仅通过气态Mg的损失而分解。测定了MgB2/MgB4和MgB4/MgB7两相混合物高温分解过程中Mg(g)的平衡压力，并确定了相应的标准反应焓。MgB2和MgB4的分解温度也由相关的范霍夫图推断。(C) 2002年美国物理研究所。
The vaporization behavior of MgB2 and MgB4 under thermodynamic conditions has been studied by the Knudsen effusion-mass spectrometry technique. In the temperature range explored (883-1154 K), magnesium borides are observed to decompose by loss of gaseous Mg only. The equilibrium pressures of Mg(g) have been measured during high-temperature decompositions involving MgB2/MgB4 and MgB4/MgB7 two-phase mixtures and the corresponding standard reaction enthalpies were determined. The decomposition temperatures for MgB2 and MgB4 were also inferred by the relevant Van't Hoff plots. (C) 2002 American Institute of Physics.