Thermal equation of state of cubic boron nitride: Implications for a high-temperature pressure scale
Thermal equation of state of cubic boron nitride: Implications for a high-temperature pressure scale
复制标题
DOI：
10.1103/physrevb.75.224114
复制
发表时间：
2007-06-01
影响因子：
3.7
通讯作者：
Mezouar, Mohamed
中科院分区：
文献类型：
--
作者：
Goncharov, Alexander F.;Crowhurst, Jonathan C.;Mezouar, Mohamed
测定了立方氮化硼(CBN)的状态方程，其最高温度为3300K，同时静压高达70 Gpa以上。对80 GPA和2000K进行了从头计算。我们的实验数据可以与理论结果和已知的1巴的热膨胀相一致，如果我们假设加热过程中的压力相对于在环境温度下测量的压力有一个小的增加。目前的数据与我们早先提供的拉曼测量相结合，形成了至少3300K的高温压力标尺的基础。
The equation of state of cubic boron nitride (cBN) has been determined to a maximum temperature of 3300 K at a simultaneous static pressure of up to more than 70 GPa. Ab initio calculations to 80 GPa and 2000 K have also been performed. Our experimental data can be reconciled with theoretical results and with the known thermal expansion at 1 bar if we assume a small increase in pressure during heating relative to that measured at ambient temperature. The present data combined with the Raman measurements we presented earlier form the basis of a high-temperature pressure scale that is good to at least 3300 K.