晶体热膨胀的研究  

Study of Thermal Expansion of the Crystal

作　　者：尹会听[1] 方正华[1] 

机构地区：[1]安徽师范大学物理与电子信息学院,安徽芜湖241000

出　　处：《浙江海洋学院学报（自然科学版）》2010年第6期583-585,596,共4页Journal of Zhejiang Ocean University(Natural Science Edition)

摘　　要：微观研究发现,晶体热膨胀应是原子非简谐振动的宏观表现。进一步分析原子间相互作用力,将原子间相互作用势按泰勒级数展开后与线膨胀系数定义式结合,得到一线膨胀系数的具体计算公式。原子相互作用势取Morse势,计算NaCl晶体的线膨胀系数,结果在室温和高温条件下与实验值均符合较好。From a micro perspective,the thermal expansion of crystals is the performance of atomic non-simple harmonic motion.Through further analyzing the interaction between atoms,we combine the atomic interaction potential which is expanded by the Taylor＇s series with the coefficient of linear expansion,and then get a formula of linear expansion coefficient.The potential is chosen to be the form of Morse potential.Through calculating the linear expansion coefficient of NaCl crystal,we find the values of calculation are good agreement with the experimental data at room temperature and high temperature.

关 键 词：短程势 MORSE势 热膨胀 线胀系数 NACL晶体 

分 类 号：O482.2[理学—固体物理]