scholarly journals Синтез, структура и теплофизические свойства оксидов системы YVO_4-BiVO-=SUB=-4-=/SUB=-

2020 ◽  
Vol 62 (4) ◽  
pp. 640
Author(s):  
Л.Т. Денисова ◽  
Е.О. Голубева ◽  
Л.Г. Чумилина ◽  
В.М. Денисов
Keyword(s):  
Differential Scanning Calorimetry ◽  
Heat Capacity ◽  
High Temperature ◽  
Solid Phase Synthesis ◽  
Solid Phase ◽  
Scanning Calorimetry ◽  
Two Phase ◽  
Phase Synthesis ◽  
High Temperature Heat Capacity ◽  
Temperature Heat

Abstract The Y_0.4Bi_0.6VO_4 and Y_0.6Bi_0.4VO_4 solid solutions two-phase at x _Bi = 0.95, 0.90, and 0.80 have been formed by the solid-phase synthesis from the initial Y_2O_3, Bi_2O_3, and V_2O_5 oxides burned in air at a temperature of 1173 K for 200 h and their high-temperature heat capacity has been measured in the range of 350–1000 K by differential scanning calorimetry. The thermodynamic properties of the solution solutions have been calculated using the data obtained.

scholarly journals Структура и термодинамические свойства SmGaGe-=SUB=-2-=/SUB=-O-=SUB=-7-=/SUB=-

2020 ◽  
Vol 62 (2) ◽  
pp. 332
Author(s):  
Л.Т. Денисова ◽  
М.С. Молокеев ◽  
Л.А. Иртюго ◽  
В.В. Белецкий ◽  
Н.В. Белоусова ◽  
...  
Keyword(s):  
Differential Scanning Calorimetry ◽  
Heat Capacity ◽  
Solid Phase Synthesis ◽  
Solid Phase ◽  
X Ray Diffraction ◽  
Scanning Calorimetry ◽  
Phase Synthesis ◽  
High Temperature Heat Capacity ◽  
X Ray ◽  
Temperature Heat

SmGaGe2O7 has been prepared by solid-phase synthesis in air at temperatures from 1273 to 1473 K using the Sm2O3, Ga2O3, and GeO2 oxides as starting materials. The structure of the studied germanate was determined by X-ray diffraction (space group P2_1 / c; a = 7.18610(9) Angstrem, b = 6.57935(8) Angstrem, c = 12.7932(2) Angstrem). Its high-temperature heat capacity has been measured by differential scanning calorimetry. The obtained experimental dependence C_p = f (T) has been used to evaluate the thermodynamic properties of the compound.

scholarly journals Высокотемпературная теплоемкость германатов Pr-=SUB=-2-=/SUB=-Ge-=SUB=-2-=/SUB=-O-=SUB=-7-=/SUB=- и Nd-=SUB=-2-=/SUB=-Ge-=SUB=-2-=/SUB=-O-=SUB=-7-=/SUB=- в области 350-1000 K

2018 ◽  
Vol 60 (3) ◽  
pp. 618
Author(s):  
Л.Т. Денисова ◽  
Л.А. Иртюго ◽  
В.В. Белецкий ◽  
Н.В. Белоусова ◽  
В.М. Денисов
Keyword(s):  
Differential Scanning Calorimetry ◽  
Heat Capacity ◽  
Thermodynamic Properties ◽  
Temperature Effect ◽  
Molar Heat Capacity ◽  
Solid Phase Synthesis ◽  
Solid Phase ◽  
Scanning Calorimetry ◽  
Phase Synthesis

AbstractPr2Ge2O7 and Nd2Ge2O7 were obtained via solid-phase synthesis from Pr2O3 ( Nd2O3 ) and GeO2 with multistage firing in air within 1273–1473 K. A temperature effect on molar heat capacity of the oxide compounds was measured with a differential scanning calorimetry. Their thermodynamic properties were calculated from the C _ P = f ( T ) dependences.

scholarly journals High-temperature heat capacity ErInGe2O7 and TbInGe2O7 in the range 350-1000 K

2019 ◽  
Vol 486 (2) ◽  
pp. 193-196
Author(s):  
L. T. Denisova ◽  
A. D. Izotov ◽  
Yu. F. Kargin ◽  
L. A. Irtugo ◽  
V. V. Beletskiy ◽  
...  
Keyword(s):  
Differential Scanning Calorimetry ◽  
Heat Capacity ◽  
High Temperature ◽  
Solid State ◽  
Thermodynamic Properties ◽  
Solid State Reactions ◽  
Effect Of Temperature ◽  
Scanning Calorimetry ◽  
High Temperature Heat Capacity ◽  
Temperature Heat

SmFeGe2O7 germanate was obtained by solid-state reactions from stoichiometric mixtures of starting oxides with multistage firing within 1273-1473 K. The effect of temperature on the heat capacity of the compound was studied using differential scanning calorimetry. Based on the dependence Cp = f(T), its thermodynamic properties are calculated.

scholarly journals Высокотемпературная теплоемкость апатитов Pb-=SUB=-10-x-=/SUB=-Nd-=SUB=-x-=/SUB=-(GeO-=SUB=-4-=/SUB=-)-=SUB=-2+x-=/SUB=-(VO)-=SUB=-4-x-=/SUB=- (x=0-3)

2019 ◽  
Vol 61 (7) ◽  
pp. 1397
Author(s):  
Л.Т. Денисова ◽  
Е.О. Голубева ◽  
H.В. Белоусова ◽  
В.М. Денисов ◽  
Н.А. Галиахметова
Keyword(s):  
Differential Scanning Calorimetry ◽  
Heat Capacity ◽  
High Temperature ◽  
Solid State ◽  
Gibbs Energy ◽  
Entropy Change ◽  
Apatite Structure ◽  
Scanning Calorimetry ◽  
High Temperature Heat Capacity ◽  
Temperature Heat

The Pb10-xNdx(GeO4)2+x(VO4)4-x (x = 0 ‒ 3) compounds with the apatite structure have been synthesized from PbO, Nd2O3, GeO2 and V2O5 oxides by the solid-state synthesis with successive burning in air within 773-1073 K. The high-temperature heat capacity of the compounds obtained was determined by differential scanning calorimetry. The CP = f(T) data have been used to evaluate their thermodynamic properties (enthalpy increment, entropy change, and reduced Gibbs energy).

scholarly journals Синтез, структура и теплофизические свойства апатитов Pb-=SUB=-1-x-=/SUB=-Bi-=SUB=-x-=/SUB=-(GeO-=SUB=-4-=/SUB=-)-=SUB=-2+x-=/SUB=-VO-=SUB=-4-=/SUB=-)-=SUB=-4-x-=/SUB=- (x=0-3) в области 350-950 K

2020 ◽  
Vol 62 (11) ◽  
pp. 1828
Author(s):  
Л.Т. Денисова ◽  
М.С. Молокеев ◽  
В.М. Денисов ◽  
Е.О. Голубева ◽  
Н.А. Галиахметова
Keyword(s):  
Experimental Data ◽  
Differential Scanning Calorimetry ◽  
Solid Phase Synthesis ◽  
Solid Phase ◽  
X Ray Diffraction ◽  
Scanning Calorimetry ◽  
Phase Synthesis ◽  
Influence Of Temperature ◽  
X Ray ◽  
Influence Of Temperature On

The compounds Pb10 ‒ xBix(GeO4)2+x(VO4)4-x (x = 0-3) with an aatite structure were first synthesized from the initial oxides of PbO, Bi2O3, GeO2 and V2O5 by solid ‒ phase synthesis with annealing in air in the temperature range of 773-1073 K. Their structure was determined using x-ray diffraction analysis. The influence of temperature on the heat capacity of synthesized compounds was studied using differential scanning calorimetry. Using the experimental data on Cp = f(T), the thermodynamic properties of the compound have been calculated.

High-temperature heat capacity of the Al63Cu25Fe12 quasicrystal

2008 ◽  
Vol 50 (11) ◽  
pp. 2013-2015 ◽  
Author(s):  
A. F. Prekul ◽  
V. A. Kazantsev ◽  
N. I. Shchegolikhina ◽  
R. I. Gulyaeva ◽  
K. Edagawa
Keyword(s):  
Heat Capacity ◽  
High Temperature ◽  
High Temperature Heat Capacity ◽  
Temperature Heat

High-temperature heat capacity of copper metaborate CuB2O4

2012 ◽  
Vol 54 (10) ◽  
pp. 2142-2144 ◽  
Author(s):  
V. M. Denisov ◽  
L. T. Denisova ◽  
L. A. Irtyugo ◽  
N. V. Volkov ◽  
G. S. Patrin ◽  
...  
Keyword(s):  
Heat Capacity ◽  
High Temperature ◽  
High Temperature Heat Capacity ◽  
Temperature Heat
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