The temperature dependences of the order parameter and of the internal energy per molecule are calculated, and the values of the relevant physical quantities at the nematic isotropic phase transition are given. 计算了序参数和单分子内能对温度的依赖关系。给出了有关物理量在向列相&各向同性相相变点的值。
The effects of an electric field on the liquid crystalline phase behavior of the colloidal nematic and isotropic LDH dispersions were studied with polarized light microscopy and optical detection system observations. 本文采用偏光显微镜以及光学检测系统研究了外施加电场对LDH胶体分散体系液晶相行为的影响。
In the molecular field approximation, the effects of molecular biaxiality of nematic liquid crystals on lowest supercooling temperature in isotropic phase and on the critical magnetic field are studied. 在分子场近似下,研究分子双轴性对向列相液晶在各向同性相最低过冷温度的影响,以及对临界磁场的影响。
Assuming a simple biaxial molecular interaction model in nematic liquid crystal, and using the mean field approximation, phase transitions from isotropic to uniaxial nematics, uniaxial to biaxial nematics are obtained. 假设一双轴性向列相液晶分子简单相互作用模型,利用平均场理论,得到从各向同性相至单轴向列相、单轴向列相至双轴向列相的相变。