矿物材料热膨胀定量计算

热膨胀是矿物材料的重要属性之一 ,它的研究在理论和实际应用中都具有非常重要的意义。热膨胀系数的定量计算可分为经验晶体化学方法和理论计算方法。定量计算是一种有效地获得热膨胀系数的方法 ,也是预测不同温度范围热膨胀系数的有效方法 ,通过定量计算获得大部分矿物的热膨胀系数是可能的。经验晶体化学方法只能获得有关矿物的平均热膨胀数据 ,而单纯的理论模型无法适应所有晶体结构的热膨胀系数的计算。建立在理论模型基础上的热膨胀系数的计算必须应用经验晶体化学方法针对不同结构类型进行有效地调整。这样有必要对热膨胀数据进行分类整理 ,在此基础上根据矿物的热膨胀特性对矿物进行分类 ,然后再针对不同矿物类型采用不同的模型进行计算。

A REVIEW ON THE QUANTITATIVE CALCULATION OF THERMAL EXPANSION COEFFICIENT OF MINERAL MATERIALS

Thermal expansion is one of the important properties of minerals and of theoretical and practical importance. The methods or models of the quantitative calculation of thermal expansion coefficient of minerals can be classified into the empirical crystal chemistry approach and the theoretical approach. These methods or models show promise as a means of calculating and predicting the thermal expansion coefficient in a wide range temperature.The empirical crystal chemistry approach can only calculate the average value of the thermal expansion coefficient, and the theoretical approach is not fit for calculating with reasonable accuracy the thermal expansion coefficient of all minerals, so the calculation must base on the theoretical approach with the adjustable parameters of the crystal chemistry. The types of minerals should be established according to the thermal expansion properties of crystals, and the different adjustable models are applied to the different types of minerals.