The Experts below are selected from a list of 15 Experts worldwide ranked by ideXlab platform
Yunfei Si - One of the best experts on this subject based on the ideXlab platform.
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Crystallization behaviors of ferroelectric and piezoelectric materials
Modern Physics Letters B, 2009Co-Authors: Xu Zhao, Yunfei SiAbstract:Crystallization represents a kind of phase transition, which can be regarded as a process related to bond formation and breaking. According to the chemical bonding characteristics of Constituent atoms, the ideal morphology of LiNbO3 crystals has been successfully predicted by using the chemical bonding theory, which consists well with our experimental results. Some observations concerning the morphology evolution of KH2PO4 (KDP), NH4H2PO4 (ADP) and ZnO crystals can also be kinetically simulated by the present theory. The obtained results indicate that the Microscopic Constituent chemical bonds can help us to comprehensively understand the crystallization mechanism on the basis of quantitative calculations of growth rate in different crystal faces. The chemical bonding theory builds up a link between the crystallographic structure, growth morphology and Microscopic chemical bonds of crystal materials, which provides us a useful Microscopic tool to quantitatively understand single crystal growth behaviors.
Zheng Lianhu - One of the best experts on this subject based on the ideXlab platform.
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the control action of northeast qin s coal Microscopic Constituent to micro fissure
Sichuan University of Arts and Science Journal, 2013Co-Authors: Zheng LianhuAbstract:The Microscopic Constituent of coal-bed and the micro-fissure's binary relation study has a potential value to the coal-bed methane's mine.Through the comprehensive analysis of microscopy,electron microscopy,physical property's data of the northeast Qin of Taiyuan Group No.15 coal and the elaborating of the binary mechanism between the Microscopic Constituent of coal-bed and micro-fissure which show that matrix organic Microscopic Constituent can produce tensional fissures and pressure fissures,tensional fissures in the vitreous component has bigger effect on the diffusion of coal-bed methane,endogenous fissures in the inertinite component are undeveloped.Permeability of the area presented hypotonic-ultra-low permeability,its main reasons are that the cleats are filled up by the vein calcite and clay minerals.
Xu Zhao - One of the best experts on this subject based on the ideXlab platform.
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Crystallization behaviors of ferroelectric and piezoelectric materials
Modern Physics Letters B, 2009Co-Authors: Xu Zhao, Yunfei SiAbstract:Crystallization represents a kind of phase transition, which can be regarded as a process related to bond formation and breaking. According to the chemical bonding characteristics of Constituent atoms, the ideal morphology of LiNbO3 crystals has been successfully predicted by using the chemical bonding theory, which consists well with our experimental results. Some observations concerning the morphology evolution of KH2PO4 (KDP), NH4H2PO4 (ADP) and ZnO crystals can also be kinetically simulated by the present theory. The obtained results indicate that the Microscopic Constituent chemical bonds can help us to comprehensively understand the crystallization mechanism on the basis of quantitative calculations of growth rate in different crystal faces. The chemical bonding theory builds up a link between the crystallographic structure, growth morphology and Microscopic chemical bonds of crystal materials, which provides us a useful Microscopic tool to quantitatively understand single crystal growth behaviors.
Jonathan P. K. Doye - One of the best experts on this subject based on the ideXlab platform.
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Perturbative density functional methods for cholesteric liquid crystals
Journal of Chemical Physics, 2017Co-Authors: Maxime M. C. Tortora, Jonathan P. K. DoyeAbstract:We introduce a comprehensive numerical framework to generically infer the emergent macroscopic properties of uniaxial nematic and cholesteric phases from that of their Microscopic Constituent mesogens. This approach, based on the full numerical resolution of the Poniewierski-Stecki equations in the weak chirality limit, may expediently handle a wide range of particle models through the use of Monte Carlo sampling for all virial-type integrals. Its predictions in terms of equilibrium cholesteric structures are found to be in excellent agreement with previous full-functional descriptions, thereby demonstrating the quantitative validity of the perturbative treatment of chirality for pitch lengths as short as a few dozen particle diameters. Furthermore, the use of the full angle-dependent virial coefficients in the Onsager-Parsons-Lee formalism increases its numerical efficiency by several orders of magnitude over that of these previous methods. The comparison of our results with numerical simulations however...
Maxime M. C. Tortora - One of the best experts on this subject based on the ideXlab platform.
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Perturbative density functional methods for cholesteric liquid crystals
Journal of Chemical Physics, 2017Co-Authors: Maxime M. C. Tortora, Jonathan P. K. DoyeAbstract:We introduce a comprehensive numerical framework to generically infer the emergent macroscopic properties of uniaxial nematic and cholesteric phases from that of their Microscopic Constituent mesogens. This approach, based on the full numerical resolution of the Poniewierski-Stecki equations in the weak chirality limit, may expediently handle a wide range of particle models through the use of Monte Carlo sampling for all virial-type integrals. Its predictions in terms of equilibrium cholesteric structures are found to be in excellent agreement with previous full-functional descriptions, thereby demonstrating the quantitative validity of the perturbative treatment of chirality for pitch lengths as short as a few dozen particle diameters. Furthermore, the use of the full angle-dependent virial coefficients in the Onsager-Parsons-Lee formalism increases its numerical efficiency by several orders of magnitude over that of these previous methods. The comparison of our results with numerical simulations however...