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The temperature dependences of the dielectric permittivity ε' and dielectric loss tangent tgδ have been studied for KD2PO4 embedded into the pores of the SBA-15 molecular sieves and opals. An increase in the phase transition temperature by 5 K was found for KD2PO4 in the pores of opal as compared to the polycrystalline sample. In the composite KD2PO4/SBA-15 samples, no phase transitions were detected...
Temperature and frequency dependence of the dielectric properties of a (NaNO2)1–x/(KNO2)x composite is investigated. The temperature hysteresis of the upper phase transition and the change of the interval of existence of the disproportionate phase are established. Upon cooling, the real component of the dielectric permittivity at low frequencies f < 105 Hz is less than upon heating, whereas the...
The activity of haematite, magnetite, pyrite and pyrrhotite containing ore catalysts, modified by treatment in a tensile-energy planetary activator mill and by elemental sulphur additions, has been studied in lignite hydrogenation and coal-derived liquid hydrocracking processes. The application of modified ore catalysts resulted in a significant (by two to four times) increasing of lignite conversion...
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