热胀冷缩是自然界物体的一种基本热学性质。然而也有少数材料并不遵循这一基本物理规则,存在着反常的热膨胀性质,即其体积随着温度的升高反常缩小(或不变)。其中,有一类材料的体积在一定温区内保持不变,称为零膨胀材料,在很多重要的科学工程领域具有重要的应用价值。目前已有的 Thermal expansion and contraction is a nature of the nature of a basic thermal properties. However, there are also a few materials that do not follow this basic physical rule and have the unusual property of thermal expansion that their volume shrinks abnormally (or does not change) as the temperature increases. Among them, the volume of a class of materials in a certain temperature area remains unchanged, called zero-expansion material, in many important scientific engineering fields have important application value. Currently available