论文部分内容阅读
一、晶体和非晶体的定义有固定的熔化温度的固体叫做晶体,海波、食盐、冰、明矾、萘和各种金属等都是晶体.晶体熔化时的温度叫熔点,同种晶体的熔点和凝固点是相同的,如冰的熔点为0℃,水的凝固点也为0℃.没有固定的熔化温度的固体叫做非晶体,玻璃、石蜡、沥青和松香等都是非晶体.非晶体没有熔点.二、晶体和非晶体的区别1.晶体具有规则的几何形状,如图1所示,食盐晶体是立方体、冰雪晶体为六角形,而非晶体没有规则的外形.2.晶体熔化条件是温度必须达到熔点,且要继续
First, the definition of crystal and non-crystal A fixed melting temperature of solid called crystal, sea wave, salt, ice, alum, naphthalene and various metals are crystal melting temperature is called the melting point, melting point of the same crystal The same as the freezing point, such as the melting point of ice is 0 ℃, the freezing point of water is also 0 ° C. Solid without a fixed melting temperature is called amorphous, glass, paraffin, asphalt and rosin are non-crystalline amorphous non-melting point. Second, the difference between crystals and non-crystalline 1. Crystal has a regular geometry, as shown in Figure 1, salt crystal is a cube, hexagonal crystals of ice and snow, and non-crystal non-regular shape .2 crystal melting conditions are temperature must Reach the melting point and continue