THERMAL-CONDUCTIVITY AND HEAT-CAPACITY OF SOLID NACL AND NAI UNDER PRESSURE
THERMAL-CONDUCTIVITY AND HEAT-CAPACITY OF SOLID NACL AND NAI UNDER PRESSURE
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DOI：
10.1016/0022-3697(86)90025-9
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发表时间：
1986-01-01
影响因子：
4
通讯作者：
ANDERSSON, P
中科院分区：
文献类型：
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作者：
HAKANSSON, B;ANDERSSON, P
我们使用瞬态热线技术测量了固体NaCl和NaI的单位体积导热系数和热容。测量在100-400 K的温度范围内进行，压力高达2 GPa。热导率数据分析表明，Leibfried-Schlömann公式对NaCl的描述优于对NaI的描述。对于NaCl和NaI，光声子对导热系数的影响都不可忽视。然而，由于NaI的离子质量比更大，仅考虑声子对NaI比NaCl是更好的近似。在室温下得到的比热容几乎与压力无关。
We measured the thermal conductivity and heat capacity per unit volume for solid NaCl and NaI using the transient hot-wire technique. Measurements were performed in the temperature range 100–400 K and at pressures up to 2 GPa. Analysis of the thermal conductivity data showed that the Leibfried-Schlömann formula is a better description for NaCl than for NaI. For both NaCl and NaI the effect of optic phonons on thermal conductivity cannot be ignored. However, taking only acoustic phonons into account is a better approximation for NaI than for NaCl, due to the larger ionic mass ratio for NaI. The specific heat capacities, obtained at room temperature, were approximately independent of pressure.