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Solid polymorphism in five compounds of the type [Me(H20)6](BF4)2 , where Me = Mn, Fe, Co, Ni and Zn, have been studied in the temperature range 120 330 K by DSC. For each substance at least three solid modifications have been found. In addition, for compounds with Me = Mn, Fe and Zn some new low temperature phase transitions have been observed. The transition temperatures for the [Me(H20)6](BF...

high density polyethylene (hdpe) films were produced using cast film extrusion process with different draw ratios, ranging from 16.9 to 148.8. morphology, crystallinty and orientation state of crystalline and amorphous phases of the cast films were investigated using scanning electron microscopy (sem), differential scanning calorimetry (dsc) and polarized fourier transform infrared spectroscopy...

Highly crystalline TiO(2) nanostructures were prepared through a facile inorganic acid-assisted hydrothermal treatment of hexagonal-structured assemblies of nanocrystalline titiania templated by cetyltrimethylammonium bromide (Hex-ncTiO(2)/CTAB Nanoskeleton) as starting materials. All samples were characterized by X-ray diffraction (XRD) and transmission electron microscopy (TEM). The influence...

We reviewed structural phase transitions in crystalline materials, especially recent simulations and experiments on the shock-induced transitions in iron. They both confirmed a phase transition wave in the picosecond to nanosecond time scale, inferred previously from wave profile analyses. The nonequilibrium molecular dynamics simulation suggests modification of pair potentials from temperature...

The thermotropic phase behavior of cholesterol monohydrate in water was investigated by differential scanning calorimetry, polarizing light microscopy, and x-ray diffraction. In contrast to anhydrous cholesterol which undergoes a polymorphic crystalline transition at 39 degrees C and a crystalline to liquid transition at 151 degrees C, the closed system of cholesterol monohydrate and water exhi...

ag/tio2 photocatalytic nanoparticles by two methods, the sol – gel using a reducing agent and spattering was produced. crystalline phase of titanium dioxide was investigated in both. ag/tio2 peak in the sol – gel method at temperatures of 300,500 and 6000c were studied. ag/tio2 peak at different temperatures were determined using the spattering. xrd patterns of calcined this is tio2 and ag/ tio2.