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Equation of state of α-Al_2O_3

机译:α-Al_2O_3的状态方程

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The ambient temperature equation of state of ruby in the corundum phase (α-Al_2O_3) has been measured up to 165 GPa in a diamond anvil cell, using a soft pressure transmitting medium. No clear sign of phase transformation or amorphization has been observed in this range, which could affect its luminescence signal. The equation of state of(α-Al_2O_3)has also been calculated within density functional theory, with two different approximations of the exchange-correlation energy (local density and generalized gradient). With suitable correction, these equations of state are predictive within ΔP/P = 2.5%.
机译:使用软压力传输介质,已在金刚石砧座中测量了高达165 GPa的刚玉相中红宝石状态的环境温度方程(α-Al_2O_3)。在此范围内未观察到明显的相变或非晶化迹象,这可能会影响其发光信号。 (α-Al_2O_3)的状态方程也已经在密度泛函理论中进行了计算,具有两个交换相关能量的近似值(局部密度和广义梯度)。通过适当的校正,这些状态方程可预测ΔP/ P = 2.5%。

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