Size Control of Spherical Leucite Crystals.
نویسندگان
چکیده
منابع مشابه
Effect of leucite crystals on the strength of glassy porcelain.
Porcelains with leucite crystals dispersed into various glass matrices were prepared for investigating the effects of the leucite crystals on the mechanical strength of glassy porcelain. The strength of glassy porcelains containing leucite crystals was affected by the differences of thermal expansion coefficients, compositions and deformation temperatures of the glass matrices. In the case of a...
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X-ray diffractometry (XRD) was used to analyze the crystal phases of three commercial dentin and incisal porcelains prepared by normal cooling, quenching in water, and controlled slow annealing after normal firing. There were no remarkable differences in the contents of either tetragonal and cubic leucite in the fired porcelain discs prepared under the three cooling conditions. Furthermore, the...
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Ordered systems, such as liquid crystals, are dramatically affected by confinement and curvature. One of the main consequences is the presence of topological defects in the ground state of the liquid crystal. For instance, when a nematic liquid crystal is confined to a thin spherical shell, theory predicts a configuration with four defects arranged in a tetrahedral fashion. This prediction hold...
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An analysis of the structural properties of three-dimensional Coulomb clusters confined in a spherical parabolic trap is presented. Based on extensive high-accuracy computer simulations the shell configurations and energies for particle numbers in the range 60 < or = N < or = 160 are reported. Further, the intrashell symmetry and the lowest metastable configurations are analyzed for small clust...
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Small three-dimensional strongly coupled clusters of charged particles in a spherical confinement potential arrange themselves in nested concentric shells. If the particles are immersed into a background plasma the interaction is screened. The cluster shell configuration is known to be sensitive to the screening strength. With increased screening an increased population of the inner shell(s) is...
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ژورنال
عنوان ژورنال: Journal of the Ceramic Society of Japan
سال: 2002
ISSN: 0914-5400,1882-1022
DOI: 10.2109/jcersj.110.27