一、金属热胀冷缩和磁性材料居里点的物理原理初中学生学习了物理热现象中金属物质热胀冷缩的原理,金属热胀冷缩的微观原理是在金属固体中,金属离子间力的作用比较大,绝大多数金属离子被束缚在平衡位置附近做微小的振动。温度升高,金属离子的无规则运动加剧,加剧到一定程度,离子间的作用力已经不能把金属离子束缚在固定的平衡位置附近。宏观表现 First, the physical principles of thermal expansion and contraction of metal and Curie point of magnetic materials Junior high school students to learn the physical thermal phenomenon of thermal expansion and contraction of metal materials, the principle of microscopic principle of metal thermal expansion and contraction in the metal solids, metal ions The role of force is relatively large, the vast majority of metal ions are bound to make a small vibration near the equilibrium position. Temperature increases, irregular movement of metal ions intensified, exacerbated to a certain extent, the interaction between ions has been unable to bind the metal ions in a fixed equilibrium position near. Macro performance