For foundry sand from a famous domestic area the curve of thermal expansivity with the temperature was described .

本文最后给出了利用 本 装置 测 得的国内某著名铸造用原砂的 热 膨胀 －温度曲线。

These properties include vapor-liquid and critical properties constant pressure heat capacity thermal expansivity and isothermal compressibility transport properties as viscosity self-diffusion coefficient and thermal conductivity and liquid density and viscosity of binary mixture .

这些热力学性质包括气液相平衡及临界性质，恒压热容， 热 涨 系数，压缩系数，传递性质如剪切粘度、扩散系数、热传导系数等，以及二元混合物的密度和粘度。

In the high temperature the thermal expansion and thermal expansivity of ceramic cores are small and the size stability is extremely good .

陶瓷型芯在高温时的热膨胀 率及 热 膨胀 系数都很小，型芯有很好的高温尺寸稳定性。

Polyimide ( PI ) had been widely used in electric industries because of their outstanding characteristics such as excellent tensile strength and modulus low thermal expansivity and dielectric constant ε good insulation capacity and good resistance to organic solvents .

聚酰亚胺因为其优异的性能被广泛的应用于电气工业，例如高强度与高模量， 低热 膨胀 系数和介电常数，优异的绝缘性能和耐溶剂性。