Results 251 to 260 of about 304,137 (289)

Subsolidus isothermal fractional crystallization

American Mineralogist, 2014
In theory, multicomponent silicate liquids of minimum or eutectic composition should crystallize their solidus phases simultaneously and in their invariant proportions. In reality, the crystallization of those liquids of granitic composition produces sequential assemblages and normal fractional crystallization of solid solutions when crystallization ...
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Isothermal and non-isothermal cold crystallization of tetrabenzofluorene (TBF) molecules

New Journal of Chemistry, 2019
Isothermal and non-isothermal cold crystallization of TBFC homologs is investigated by varying the alkyl chain length from C8 to C18 employing HOPM, DSC and powder XRD techniques.
A. A. Boopathi, Srinivasan Sampath, T. Narasimhaswamy   +2 more
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Isothermal crystallization of amorphous Fe78B13Si9

Materials Science and Engineering: A, 1991
Abstract We have studied the high temperature ( T a ⩾ 500 °C) isothermal crystallization process in amorphous Fe 78 B 13 Si 9 using a differential scanning calorimeter. X-ray diffraction, the etching technique and metallographic observation have been used to analyze specimens under different treatments.
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Isothermal and non-isothermal crystallization kinetics of hydroxyl-functionalized polypropylene

Polymer, 2014
Abstract Hydroxyl-modified polypropylenes (PPOH) with side chains containing OH groups were synthesized by copolymerization of the propylene and undecenyloxytrimethylsilane monomers. The isothermal and non-isothermal crystallization behavior of the modified polypropylenes (PPOH) with side chains containing up to 6.8 mol% OH groups were compared with ...
Sahil Gupta, Xuepei Yuan, T.C. Mike Chung, M. Cakmak, R.A. Weiss   +4 more
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Kinetics of non-isothermal crystallization

Polymer, 1971
Abstract Non-isothermal kinetics of the process of nucleation and its growth are derived by extending Avrami's equation. Kinetic analysis of the thermoanalytical data of the process is also described and applied to DSC curves of crystallization obtained by cooling poly(ethylene terephthalate) at constant rates.
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Isothermal crystallisation kinetics of liquid crystal semiflexible polyesters

Thermochimica Acta, 1990
Abstract The isothermal crystallisation from the nematic phase of five thermotropic liquid crystalline TR m polyesters formed from two mesogenic p -oxybenzoyl diads alternately flanked by a trioxyethylene segment and a polymethylene spacer of variable length ( m = 6–10) was investigated.
LAUS, Michele, P. Ferruti, D. Caretti, A. S. Angeloni, G. Galli, E. Chiellini   +5 more
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Non-isothermal and isothermal crystallization kinetics and their effect on microstructure of sintered and crystallized TiNbZrTaSi bulk alloys

Journal of Non-Crystalline Solids, 2016
Abstract Non-isothermal and isothermal crystallization kinetics of mechanically alloyed Ti65Nb23.33Zr5Ta1.67Si5 metallic glass (MG) powder and their effect on microstructure and mechanical property of spark-plasma-sintered and crystallized bulk counterparts were investigated by using Johnson–Mehl–Avrami–Kolmogorov equation. Results show the MG powder
Y.H. Li, C. Yang, L.M. Kang, H.D. Zhao, S.G. Qu, X.Q. Li, W.W. Zhang, Y.Y. Li   +7 more
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On the thickening of lamellar crystals during isothermal crystallization

Kolloid-Zeitschrift & Zeitschrift für Polymere, 1969
Two theories on the mechanism of the thickening of chain-folding lamellae occurring during isothermal crystallization are conflicting. One attributes the thickening to an annealing process by which isothermal crystallization should be accompanied. An alternative explanation proposed by the author in the preceding paper, was that the effect should be ...
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Dynamic Behavior of the Well-Mixed Isothermal Crystallizer

AIChE Journal, 1967
AbstractUnder some conditions, continuous crystallization exhibits cyclic changes of the particle size even with constant input conditions. A linearized stability analysis has been performed to determine under what conditions this behavior can be expected.
M. B. Sherwin, Reuel Shinnar, Stanley Katz   +2 more
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Isothermal compression of staurolite: A single-crystal study

American Mineralogist, 2002
The response of staurolite to pressure was studied by single crystal X-ray diffraction (XRD) in a diamond-anvil cell, using crystals with composition: (Fe 3 . 3 6 5 Zn 0 . 0 2 5 Li 0 . 1 1 4 Co 0 . 0 0 9 Mn 0 . 0 3 4 )[T2, M4] (Al 2 Mg 0 . 3 0 7 )[M3] (Al 1 5 . 4 9 1 Fe 3 + 0 . 1 0 4 Mg 0 . 3 9 4 Cr 0 . 0 0 4
COMODI, Paola, Montagnoli M., ZANAZZI, Pier Francesco, Boffa Ballaran T.   +3 more
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