Results 261 to 270 of about 28,638 (302)

Melting temperature of colloidal crystals of polystyrene spheres

The Journal of Chemical Physics, 1991
The melting temperature (Tm) of colloidal crystals of polystyrene spheres has been measured by the reflection spectroscopy as a function of sphere concentration. Seven kinds of spheres their diameters ranging from 85 to 212 nm, and their monodispersity indices (standard deviation of spheres divided by the mean diameter) between 0.014 and 0.26, are used
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Low temperature melting behavior of CO ₂ crystallized modified PETs

Polymer Engineering & Science, 1995
Abstract Differential scanning calorimetry (DSC) analysis has been performed on modified and commericial amorphous samples of poly(ethylene terephthalate) (PET) crystallized by high pressure carbon dioxide (CO 2 ).
MENSITIERI G, DEL NOBILE M. A, GUERRA G, APICELLA, Antonio, AL GHATTA H.   +4 more
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Measurement of Ultrasonic Attenuation in a Crystal near the Melting Temperature

Japanese Journal of Applied Physics, 1983
An experimental method to measure the ultrasonic attenuation in a crystal at temperatures close to the melting point has been developed. The crystal was grown in a specimen cell, and pulse ultrasound was produced by a transducer attached to the outer wall of the cell and was transmitted into the specimen through the wall.
Junichi Tamura, Yosio Hiki
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Crystallization of high temperature superconductors from nonstoichiometric melts

Journal of Crystal Growth, 1988
Abstract Crystallization of high-temperature superconductors YBa2Cu3O6.5+x and (La,Sr)2CuO4 - y from homogeneous nonstoisiometric melts has been studied. The phase diagram of the CuO-BaO system was constructed. The real phase diagram of the CuO-BaO system in air having the complete liquidus corresponds to the superposition of two phase diagrams ...
A.B. Bykov, L.N. Demianets, I.P. Zibrov, G.V. Kanunnikov, O.K. Melnikov, S.M. Stishov   +5 more
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Melting of the Wigner crystal at finite temperature

Physical Review A, 1987
, Nagara, , Nagata, , Nakamura
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The Melting Temperature of FCC Crystal Na Without the Criterion Lindemann's Melting Law

World Journal of Materials Science and Technology
The Lindemann’s melting criterion, which posits that a crystal melts when the root-mean-square atomic displacement reaches a critical fraction of the interatomic distance, has been a cornerstone of simple melting theory for over a century. However, its phenomenological nature and system-dependent critical value limit its predictive
Nand Kishor, Amar Kumar
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Interface Temperature of a Crystallizing Melt

Journal of the American Ceramic Society, 1968
J. A. LAIRD, C. G. BERGERON
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Origins of convective temperature oscillations in crystal growth melts

Journal of Crystal Growth, 1976
Abstract Sinusoidal temperature oscillations of large amplitude and with periods ranging from a few seconds to a few minutes have been reported for many different crystal growth melt materials and configurations. In this paper, several models of the origins of these temperature oscillations are described which successfully explain the results ...
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Melting temperature depression of melt‐crystallized polyethylene with lamella thickness

Journal of Polymer Science Part B: Polymer Letters, 1963
Yasuna Fujiwara, Toshiho Yoshida
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An empirical relation on the melting temperature of some ionic crystals

Solid State Communications, 1972
Abstract An empirical formula on the melting temperature for some ionic crystal is obtained using the cohesive energy, the exponent in the repulsive term and the dielectric constant at high frequency.
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