Zobrazeno 1 - 10
of 39
pro vyhledávání: '"E. I. Pogorel'tsev"'
Autor:
Ivan V. Nemtsev, Maxim S. Molokeev, E. I. Pogorel’tsev, I. A. Gudim, Sergey V. Adichtchev, Alexey M. Pugachev, Yuriy G. Denisenko, Aleksandr S. Oreshonkov, V. L. Temerov, N.P. Shestakov, Aleksandr S. Aleksandrovsky
Publikováno v:
Acta Crystallographica Section B Structural Science, Crystal Engineering and Materials. 76:654-660
Single crystals of SmAl3(BO3)4 were synthesized by the group growth on seeds method. The crystal structure was solved using a single-crystal experiment and the purity of the bulk material was proved by the Rietveld method. This borate crystallizes in
Autor:
Igor N. Flerov, E. I. Pogorel’tsev, Andrey V. Kartashev, N. M. Laptash, M. S. Molokeev, E. V. Bogdanov, M. V. Gorev, Svetlana V. Melnikova
Publikováno v:
Physics of the Solid State. 62:1271-1279
The (NH4)3VOF5 crystals have been synthesized and their homogeneity and single-phase structure has been established by the X-ray diffraction, energy dispersive spectroscopy, and X-ray photoelectron spectroscopy studies. The investigations of the temp
Publikováno v:
Journal of Solid State Chemistry. 277:376-380
New fluoride compound (NH4)2KZrF7 with the elpasolite structure (sp. gr. Fm-3m) was synthesized by partial cationic substitution in (NH4)3ZrF7 cryolite. Due to small difference in ionic radii of K+ and NH4+, non-equivalent crystallographic positions
Heat capacity, thermal expansion and barocaloric effect in fluoride $$\hbox {K}_{2}\hbox {TaF}_{7}$$
Publikováno v:
Journal of Materials Science. 54:14287-14295
The heat capacity and thermal expansion of potassium heptafluorotantalate were studied. The room temperature phase $$P2_1/c$$ is stable at least to 4 K. The strong first-order phase transition $$P2_1/c - Pnma$$ at $$T_0=486.2\,\hbox {K}$$ is accompan
Autor:
Evgeniy V. Bogdanov, Andrey V. Kartashev, Natalia M. Laptash, Igor N. Flerov, E. I. Pogorel’tsev, Mikhail V. Gorev
Publikováno v:
Journal of Solid State Chemistry. 276:152-158
Heat capacity, thermal dilatation, permittivity and sensitivity to external pressure of ( NH 4 ) 3 SiF 7 were studied. Due to the absence of cubic phases P m 3 ¯ m and P a 3 ¯ , a strong decrease in the total entropy change ∑ Δ S i = 19 J/mol K
Publikováno v:
Physics of the Solid State. 61:192-200
The crystals of (ND4)3VO2F4 with a high degree of deuteration (~87%) have been grown and a significant (~1.5%) increase in the unit cell volume has been detected. The decrease in the chemical pressure leads to a change in the sequence of phase transi
Joint studies of water phase transitions in Na-bentonite clay by calorimetric and dielectric methods
Publikováno v:
Cold Regions Science and Technology. 153:172-180
The present study consisted of an experimental investigation of phase transitions of soil water contained in moist Na-bentonite clay, using the differential scanning calorimetry (DSC) method, within the temperature range from −40 to 20 °C. Based o
Autor:
A. V. Es’kov, E. I. Pogorel’tsev, V. S. Bondarev, E. A. Mikhaleva, Maxim S. Molokeev, Mikhail V. Gorev, A. V. Shabanov, Igor N. Flerov
Publikováno v:
Scripta Materialia. 146:51-54
Precise direct measurements of the intensive electrocaloric effect (ECE) in commercial multilayer capacitor based on doped BaTiO3 were performed using an adiabatic calorimeter. High reversibility of ECE studied under equilibrium thermal conditions wa
Autor:
Igor N. Flerov, Evgeniy V. Bogdanov, Svetlana V. Melnikova, E. I. Pogorel’tsev, N. M. Laptash
Publikováno v:
Journal of Fluorine Chemistry. 204:45-49
Single crystals of (NH 4 ) 3 HfF 7 were grown. Polarising optical observations as well as measurement of the heat capacity and birefringence Δn(Т) were performed in the temperature range of 200–310 K. Reversible phase transitions at temperatures
Autor:
Evgeniy V. Bogdanov, E. I. Pogorel’tsev, Igor N. Flerov, Andrey V. Kartashev, Natalia M. Laptash, Mikhail V. Gorev
Publikováno v:
Journal of Solid State Chemistry. 256:162-167
Heat capacity, thermal dilatation, susceptibility to hydrostatic pressure and dielectric properties associated with succession of three phase transitions below room temperature in double fluoride salt (NH 4 ) 3 GeF 7 were studied. A possible transfor