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Showing 1 to 7 of 7 for “"High temperature phases"”.
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The crystal stucture determination of low and high temperature phases of Tris (Ethylene Terephthalate)
… of -[O.00.C 6H 4 .CO.O.CH2 .CHJ 3 -. It has two phases, namely the Low Temperature phase (Type A) which isstable below 801C; and the High Temperature Phase (Type B) - stable between 800C and its melting temperature 320 0C. The crystal structures of these two phases have been determined by X-ray …
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Nuclear magnetic resonance investigations of structural phase transitions in silicon dioxide cristobalite and tridymite and related phases
… The structural properties and SPT's of these phases have been of mineralogical, physical and industrial interest for decades. However, the microscopic characteristics of the SPT's and the origins of the commonly observed structural disorder in the high temperature phases have been poorly …
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Growth and characterization of centimeter-sized crystals of pyridine dodecasil-3C
… allowing for the growth of large, high-purity crystals of the metastable zeolite. The twinning present in pyridine D3C crystals was removed by thermal methods. X-ray single crystal studies of detwinned crystals coupled with data from optical crystallography studies were used to …
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The Complex Behavior of Nitrogen Under Pressure: Ab Initio Simulation of the Properties of Structures and Shock Waves
… initio simulations of nitrogen as a function of temperature and pressure that reveal new structures and basic features of the phase diagram. In particular, the simulations show there are many structures with competitive ground state energies at the volumes that a non-molecular phase is predicted. …
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Experimental technique for studying high-temperature phase equilibria in reactive molten metal based systems
… an experimental technique for studying the high-temperature phase compositions and phase equilibria in molten metal-based binary and ternary systems, such as Zr-O-N, B-N-O, Al-O, and others. A specific material system of Zr-O-N was selected for studying and testing this technique. The …
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Phase Diagram Determination of (2-Amino-2-Methyl-1, 3-Propanediol) AMPL-TRMP (Trimethylolpropane) Binary System
… of a binary AMPL-TRMP system and develop a temperature-composition equilibrium phase diagram by combining differential scanning calorimetry thermal analyses, high resolution x-ray diffraction structural analyses and visual inspection of the prepared binary mixtures at different temperatures. …
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Structural studies of layered transition metal oxides
… layered phase Gd2SrCo2O7 was determined in the temperature<br/>range 300 – 973 K by refinement of powder neutron diffraction data. The room temperature<br/>structure is tetragonal, and displays small tilts of the oxygen sublattice that are described by a<br/>2a0 2a0 x c supercell model in the …