无论物质是哪种（固体、液体或气体）形态的变化，都称之为体膨胀。当物体温度改变1摄氏度时，其体积的变化和它在0℃时体积之比，叫做“体积膨胀系数”，或称“体胀系数”，符号用α表示。 与体积膨胀系数有关的还有线胀系数。
玻璃态的特征之一是体积膨胀系数较低。
One property associated with the glassy state is a low volume coefficient of expansion.
在此基础上推算出钢筋锈蚀体积膨胀系数的理论值，并根据现场多组实测值给出钢筋锈蚀体积膨胀系数的统计结果。
The coefficient of rust volume expansion is deduced based on aforementioned mechanism. Moreover, according to the data surveyed in situ, statistical results of the coefficient are given.
测定了涂层抗拉强度、膨胀系数、一定条件下的磨损体积、气孔率等性能。
The properties of coatings. e. g. tensile strength, expansion coefficient, wear volume under given conditions and porosity, etc. were tested.
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