Центральная Научная Библиотека УрО РАН

Вид документа : Статья из журнала
Шифр издания : 54/S 12
Автор(ы) : Sadovnikov S. I., Gusev A. I.
Заглавие : Effect of particle size on the thermal expansion of nanostructured lead sulfide films
Место публикации : Journal of Alloys and Compounds. - 2014. - Vol. 610. - С. 196-202.
ББК : 54
Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ
Ключевые слова (''Своб.индексиров.''): нестехиометрия--тепловое расширение--размер наночастиц--сульфид свинца
Аннотация: The effect of particle size on the thermal expansion of nanostructured lead sulfide films produced by hydrochemical deposition has been studied. The coherent scattering region size and thermal expansion coefficients of PbS nanofilm have been measured depending on the annealing temperature in the interval 293–473 K and on the duration of annealing at a constant temperature of 423 K. It is found that the thermal expansion coefficient α of nanostructured PbS film is nearly twice as large as that of bulk lead sulfide. It is shown that the observed large difference in the coefficients α is due to the small size of PbS particles in the film that leads to the change of the phonon spectrum boundaries and to the growth of anharmonicity of atomic vibrations. The additional contribution to the thermal expansion coefficient caused by the small particle size in PbS nanofilm is estimated theoretically.
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Вид документа : Статья из журнала
Шифр издания : 54/A 58
Автор(ы) : Animitsa I. E., Dogodaeva E. N., Zabolotskaya E. V.
Заглавие : Structure and Electrical Properties of Oxygen-Deficient Strontium Copper Niobate
Место публикации : Russian Journal of Inorganic Chemistry. - 2010. - Vol. 55, № 2. - С. 254-260: il.
Примечания : Bibliogr. : p. 260 (15 ref.)
ISSN: 0036-0236
ББК : 54
Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ
Ключевые слова (''Своб.индексиров.''): протонный перенос--ниобаты--стронций
Аннотация: The transport properties of Sr5.66Cu0.14Nb2.20O11.30 double perovskite, which enters the homogeneity region of (Sr1 – yCuy)6 – 2xNb2 + 2xO11 + 3x solid solution, are concerned. The total conductivity is differentiated into terms over wide ranges of temperatures and oxygen partial pressure pO2 in dry and humid atmospheres. When pO2 is low or high, a test sample has dominant electron transport of n- or p-type, respectively. In air (pO2 = 0.21 atm), the p-type electron conductivity term increases with temperature elevation. In a humid atmosphere ( pH2O= 0.02 atm), a sample is capable of a reversible incorporation of water occlusion from the gas phase; as a result, some proton conductivity term appears and ion transference numbers increase over a wide range of pO2 values
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Вид документа : Статья из журнала
Шифр издания : 54/G 96
Автор(ы) : Gusev A. I.
Заглавие : of NonstoichiometricEffect of Carbon Vacancies on the Electric Resistivity of Nonstoichiometric VCy Vanadium Carbide
Место публикации : JETP Letters. - 2009. - Vol. 90, № 3. - С. 191-196: il.
Примечания : Bibliogr. : p. 196 (21 ref.)
ISSN: 0021-3640
ББК : 54
Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ
Ключевые слова (''Своб.индексиров.''): нестехиометрия--карбид ванадия--электросопротивление
Аннотация: The influence of the temperature, concentration, and distribution of structure vacancies of the carbon sub lattice on the electric resistivity ρ of nonstoichiometric VCy vanadium carbide (0.66 ≤ y ≤ 0.875) has been studied in the temperature range of 300–1200 K. The symmetry and structure characteristics of the ordered V6C5 and V8C7 phases formed owing to low temperature annealing on various sections of the homogeneity region of the VCy carbide. The dependence of the residual electric resistivity on the content of the disordered vanadium carbide is explained by the atom–vacancy interaction and the change in the carrier concentration in the homogeneity region of VCy
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Вид документа : Статья из журнала
Шифр издания : 54/D 26
Автор(ы) : Davydov D. A., Rempel A. A.
Заглавие : Refinement of the V–O Phase Diagram in the Range 25–50 at % Oxygen
Место публикации : Inorganic Materials. - 2009. - Vol. 45, № 1. - С. P. 47-54 : il.
Примечания : Bibliogr. : p. 53-54 (36 ref.)
ISSN: 0020-1685
ББК : 54
Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ
Ключевые слова (''Своб.индексиров.''): оксид ванадия--фазовые диаграммы
Аннотация: The boundaries of the V14O6+VxOz two-phase region in the V–O system at temperatures from ~1050 to ~1650 K have been determined experimentally. The V–O phase diagram has been refined in the range 25–50 at % oxygen using structural and microstructural data for vanadium oxides containing less than 50 at % oxygen in conjunction with earlier results. The possibility of ordering of cubic vanadium monoxide has been examined
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Вид документа : Статья из журнала
Шифр издания : 54/S 89
Автор(ы) : Vyatchina V. G., Perelyaeva L. A., Zuev M. G., Baklanova I. V.
Заглавие : Structure and Properties of Glasses in the MgSO4-Na2B4O7-KPO3 System-
Место публикации : Glass Physics and Chemistry. - 2009. - Vol. 35, № 6. - С. P. 580-585: il.
Примечания : Bibliogr. : p. 585 (16 ref.)
ISSN: 1087-6596
ББК : 54
Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ
Ключевые слова (''Своб.индексиров.''): стеклообразование--стекла сульфатоборофосфатные
Аннотация: A glass formation region has been established in the MgSO4–Na2B4O7–KPO3 system. This region is located in the borate–phosphate part of the concentration triangle and occupies ~40% of the triangle area. Based on the spectral data obtained (nuclear magnetic resonance, IR and Raman spectroscopy), a model is proposed in terms of which the physicochemical properties (such as the linear thermal expansion coefficient, the softening temperature, and the glass transition temperature) of the samples are discussed
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Вид документа : Статья из журнала
Шифр издания : 54/O-97
Автор(ы) : Suntsov A. Yu., Leonidov I. A., Markov A. A., Patrakeev M. V., Blinovskov Ya. N., Kozhevnikov V. L.
Заглавие : Oxygen Nonstoichiometry and the Thermodynamic and Structural Properties of Double Perovskites PrBaCo2-xCuxO5+δ
Место публикации : Russian Journal of Physical Chemistry A. - 2009. - Vol. 83, № 5. - С. 832-838: il.
Примечания : Bibliogr. : p. 838 (11 ref.)
ISSN: 0036-0244
ББК : 54
Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ
Ключевые слова (''Своб.индексиров.''): нестехиометрия--двойные перовскиты--рзм--барий
Аннотация: The special features of the structure, electrophysical properties, and oxygen nonstoichiometry of new double perovskites PrBaCo2 –xCuxO5 +δ were studied. Within the homogeneity region with respect to copper 0 x≤1, solid solution samples had an orthorhombic structure (space group Pmmm) with the parameters ap×2ap×2ap, where ap≈3.8Å. The oxygen nonstoichiometry of PrBaCo2 –xCuxO5 +δ changes as the copper content increases approximately as δ ≈0.85 –x/2. The content of oxygen was measured by coulometric titration over wide temperature and oxygen pressure ranges. The partial thermodynamic functions of labile oxygen were calculated and the limits of the thermodynamic stability of the solid solution were established
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Вид документа : Статья из журнала
Шифр издания : 54/S 90
Автор(ы) : Gromilov S. A., D’yachkova T. V., Yusenko K. V., Kireenko I. B., Tyutyunnik A. P., Zainullin Yu. G.
Заглавие : Study of the Re0.50Rh0.50 products of thermobaric treatment
Место публикации : Journal of Structural Chemistry. - 2009. - Vol. 50, № 2. - С. 306-311: il.
Примечания : Bibliogr. : p. 310-311 (20 ref.)
ISSN: 0022-4766
ББК : 54
Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ
Ключевые слова (''Своб.индексиров.''): родий--рений--микротвердость--рентгенофазовый анализ--термолиз
Аннотация: The products of thermobaric treatment of the metastable Re0.50Rh0.50 nanocrystalline phase (a = 2.733(2) Å, c = 4.364(4) Å, space group P63/mmc, CSR ~5 nm) in a high-pressure chamber were studied. Storage of the phase at 2000C and 1.5 GPa for 3 min led to the formation of a fused particle (diam.~1 mm). The initial composition did not change, but the coherent scattering region (CSR) increased to 52 nm. An increase to 4 GPa in pressure also did not lead to a decomposition of the metastable Re0.50Rh0.50 phase, the unit cell parameters remained the same, and the size of the CSR increased by a factor of four
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Вид документа :
Шифр издания : 54/C 91
Автор(ы) : Zhuravlev V. D., Zubkov V. G., Tyutyunnik A. P., Velikodnyi Yu. A., Koryakin N. D.
Заглавие : Crystal Structures of La1-xSr2+x(GeO4)(V1-xMoxO4) (x=0-0.4) Solid Solutions
Место публикации : Russian Journal of Inorganic Chemistry. - 2009. - Vol. 54, № 1. - С. 134-136: il.
Примечания : Bibliogr. : p. 136 (11 ref.)
ISSN: 0036-0236
ББК : 54
Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ
Ключевые слова (''Своб.индексиров.''): ортованадат лантана--твердые растворы
Аннотация: The phase compositions of theLaVO4–SrMoO4(1) and Sr2GeO4–SrMoO4(2) binary systems, which bound the Sr2GeO4–LaVO4–SrMoO4(3) ternary system, and the LaSr2(VO4)(GeO4)– Sr2GeO4+SrMoO4 section (4) of system 3 are studied at subsolidus temperatures. Systems 1 and 2 consist of a mixture of the initial compounds, and the La1 –xSr2 + x(GeO4)(V1 – xMoxO4) (where 0 ≤ x ≤ 0.4) region of substitutional solid solutions with a palmierite structure is formed in system 3. The unit cell parameters of the solid solutions are determined. The distribution of the lanthanum and strontium cations over two positions of the cationic sublattice is described
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Вид документа : Статья из журнала
Шифр издания : 54/T 44
Автор(ы) : Vorokh A. S., Kozhevnikova N. S., Uritskaya A. A., Magerl A.
Заглавие : The Synthesis of Nucleus–Shell Cd(OH)2/CdS Structures by Chemical Precipitation from Aqueous Solutions
Место публикации : Russian Journal of Physical Chemistry A. - 2008. - Vol. 82, № 7. - С. P. 1132-1137: il.
Примечания : Bibliogr. : p. 1137 (16 ref.)
ISSN: 0036-0244
ББК : 54
Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ
Ключевые слова (''Своб.индексиров.''): кадмий--сульфид кадмия--растворы водные--осаждение
Аннотация: The region of stable coexistence of Cd(OH)2 and CdS as a function of pH and the concentration of the complex-forming agent (ammonia) was determined by thermodynamic analysis with the purpose of the preparation of Cd(OH)2 cadmium hydroxide particles surrounded by cadmium sulfide CdS shells. In this region, powders were obtained by chemical precipitation during various precipitation times from aqueous solutions. X-ray diffraction was used to track the growth of the CdS nanophase of a disordered structure and hexagonal Cd(OH)2 phase consumption with time. It was found by complexonometry that part of cadmium formed insoluble structures as a result of the formation of continuous nanosized CdS shells on single crystalline Cd(OH)2 particles. A comparative analysis of the experimental data was used to determine the kinetics of formation of nucleus–shell Cd(OH)2/CdS particles in the system
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10.

Вид документа : Статья из журнала
Шифр издания : 54/P 41
Автор(ы) : Nosov A. P., Rinkevich A. B., Vasil'ev V. G., Vladimirova E. V.
Заглавие : Penetration of High-Frequency Electromagnetic Field through Bulk Samples of La1-xSrxMnO3 (0.33≤x≤0.60) Manganites
Место публикации : The Physics of Metals and Metallography. - 2008. - Vol. 106, № 1. - С. 34-42: il.
Примечания : Bibliogr. : p. 41-42 (26 ref.)
ISSN: 0031-918X
ББК : 54
Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ
Ключевые слова (''Своб.индексиров.''): манганиты--электромагнитные поля
Аннотация: —Penetration of radio-frequency electromagnetic field through bulk samples of La1 –xSrxMnO3(0.33≤x≤0.60) manganites has been studied in the frequency range from 20 kHz to 30 MHz at temperatures from 300 to 400 K, which includes the temperature of the magnetic phase transition of some investigated compositions. It has been shown that, in spite of the differences in the static properties, the dynamic properties of the investigated compositions of these manganites are similar; the differences are mainly pronounced at frequencies higher than 1 MHz. In the ferromagnetic range, significant changes in the transmission coeffiicient have been observed for all compositions upon magnetization. The magnitudes of the initial dynamic magnetic permeability have been estimated. The changes in the transmission coefficient in the ferromagnetic region are mainly caused by changes in the dynamic magnetic permeability rather than by agnetoresistance. It is shown that in the paramagnetic temperature range the magnitude of the dynamic reversible permeability exceeds unity for all compositions, which supports the assumption on the retention of local magnetic ordering
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11.

Вид документа :
Шифр издания : 54/P 56
Автор(ы) : Krasnenko T. I., Rotermel' M. V., Petrova S. A., Zakharov R. G., Sivtsova O. V., Chvanova A. N.
Заглавие : Phase Relations in the Zn2V2O7–Cu2V2O7 System
Место публикации : Russian Journal of Inorganic Chemistry. - 2008. - Vol. 53, № 10. - С. 1641-1647: il.
Примечания : Bibliogr. : p. 1647 (21 ref.)
ISSN: 0036-0236
ББК : 54
Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ
Ключевые слова (''Своб.индексиров.''): пированадаты--фазовые соотношения
Аннотация: Phase relations in the Zn2V2O7–Cu2V2O7 system were studied by high-temperature X-ray diffraction and differential thermal analysis. The major phase constituents of the system are solid solutions based on Zn2V2O7 and Cu2V2O7 polymorphs and their coexistence regions. The generation of α-Zn2 – 2xCu2xV2O7 solid solution, where 0 ≤ ı ≤ 0.30, leaves almost unchanged the stabilization temperature of the high-temperature zinc pyrovanadate phase. The α-Cu2 – 2xZn2xV2O7 homogeneity range is 5 mol % Zn2V2O7. In the range 0.050 ≤ ı ≤ 0.09 from 20 to ~ 620°ë, there is the two-phase field of α-Cu2V2O7 and β-Cu2V2O7 base solid solutions. At still higher temperatures, β-Zn2 – 2xCu2xV2O7 and α-Cu2 – 2xZn2xV2O7 coexist in the mixedphase region. β-Zn2 – 2xCu2xV2O7 solid solution, where 0 ≤ ı ≤ 0.30, exists above 610 ± 5°ë. The extent of the β'-Cu2V2O7-base solid solution is 9 to 65 mol % Zn2V2O7 at 615 ± 5°ë, expanding to 0 mol % Zn2V2O7 with rising temperature
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12.

Вид документа : Статья из журнала
Шифр издания : 54/P 80
Автор(ы) : Polyakov E. V.
Заглавие : Behavior of Ionic and Colloid Forms of Microelements in Colloidal Chemical Extraction from Humic Acid Solutions
Место публикации : Radiochemistry. - 2007. - Vol. 49, № 4. - С. 432-438: il.
Примечания : Bibliogr. : p. 437-438 (44 ref.)
ISSN: 1066-3622
ББК : 54
Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ
Ключевые слова (''Своб.индексиров.''): коллоидно-химическая экстракция--гуминовая кислота--растворы--микроэлементы
Аннотация: Speciation and extractability of humic acids (HAs) and humate complexes of microelements are studied using the colloidal chemical extraction method in combination with ICP MS with an example of natural mineral water with high HA concentration (800 -1200 mg l(1) collected from the Salekhard region. Joint extraction behavior of ionic and colloid forms of anionic and cationic species of a large number of microelements, including U(VI) and Th(IV), and HAs is examined at their natural abundance in mineral water, as influenced by pH and HA concentration. Humic acids proved to behave in natural water as a pool of ioncolloidal species, whose protonation results in precipitation at pH 2.0 -3.5. In this case, some chemical elements are sorbed on the resulting solid and may be separated along with HAs by colloidal chemical extraction into isobutanol. In natural humate solutions, a considerable fraction (10 -99 mol %) of chemical elements is associated with HAs in the form of colloid species extractable with isobutanol
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13.

Вид документа :
Шифр издания : 54/K 81
Автор(ы) : Krasil'nikov V. N.
Заглавие : Phase Ratios in the K2O-V2O4-SO3 System at High Sulfur Trioxide Concentrations
Место публикации : Russian Journal of Inorganic Chemistry. - 2007. - Vol. 52, № 2. - С. 258-262: il.
Примечания : Bibliogr. : p. 262 (15 ref.)
ISSN: 0036-0236
ББК : 54
Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ
Ключевые слова (''Своб.индексиров.''): оксидные системы--ванадиевые катализаторы--триоксид серы
Аннотация: Phase ratios in the three-component oxide system K2O–V2O4–SO3 in the region of the sulfur trioxide concentrations corresponding to its concentrations in the active component of vanadium catalysts for SO2 to SO3 conversion have been studied using powder X-ray diffraction, IR spectroscopy, microscopy, and chemical analysis. Four individual compounds (K2VO(SO4)2, K2(VO)2(SO4)3, K2VO(SO4)2S2O7, and K2(VO)2(SO4)2S2O7) and K2(VO)2(SO4)2S2O7 and VOSO4-base solid solutions of composition K2(VO)2 + x(SO4)2 + xS2O7 (0 ≤ x ≤ 1.5) were found in the system. K2VO(SO4)S2O7 and K2(VO)2(SO4)2S2O7 lose their sulfur trioxide when heated above 350°C under an inert atmosphere, and convert to K2VO(SO4)2 and K2(VO)2(SO4)3, respectively. This implies that K2VO(SO4)2S2O7 and K2(VO)2(SO4)2S2O7, as well as K2(VO)2 + x(SO4)2 + xS2O7 solid solution, cannot exist in the active component of real industrial catalysts
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14.

Вид документа : Статья из журнала
Шифр издания : 54/S 61
Автор(ы) : Medvedeva N.I., Shein I. R., Gutina O. Yu., Ivanovskii A. L.
Заглавие : Simulation of the Structural, Electronic, and Magnetic Propertiesof Fe3C1 –xBxBorocementites
Место публикации : Physics of the Solid State. - 2007. - Vol. 49, № 12. - С. P. 2298-2302: il.
Примечания : Bibliogr. : p. 2301-2302 (15 ref.)
ISSN: 1063-7834
ББК : 54
Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ
Ключевые слова (''Своб.индексиров.''): бороцементиты--энтальпия--свойства магнитные--свойства структурные--свойства электронные
Аннотация: The structural, electronic, and magnetic properties and the enthalpy of formation of iron borocementites Fe3C1 –xBx(x= 0, 0.25, 0.50, 0.75, 1.00) are analyzed using ab initio calculations in the framework of the electron density functional theory. It is found that the unit cell parameter a of the orthorhombic lattice increases linearly and the parameters b and c decrease as the boron concentration increases. The density of states at the Fermi level changes only slightly, and the main variations in the band structure occur in the region of the bottom of the valence bands. The magnetic moment of the iron atoms and the total magnetization and stability of the Fe3C1 –xBx phases increase linearly with an increase in the boron concentration
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15.

Вид документа : Статья из журнала
Шифр издания : 54/S 94
Автор(ы) : Surat L. L., Zuev M. G.
Заглавие : Phase Formation in the V2O5-Nb2O5-MoO3 System
Место публикации : Russian Journal of Inorganic Chemistry. - 2007. - Vol. 52, № 10. - С. 1617-1619: il.
Примечания : Bibliogr. : p. 1619 (9 ref.)
ISSN: 0036-0236
ББК : 54
Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ
Ключевые слова (''Своб.индексиров.''): ниобий--системы оксидные--гидрокарбид ниобия
Аннотация: The solid-phase interaction in the V2O5–Nb2O5–MoO3 system has been investigated, and the formation of a solid solution bounded by the compositions MoNb2V4O18–δ,Mo2NbV5O21–δ, Mo2Nb3V3O21 – δ, and Mo4Nb9V9O57 – δ has been found (δ is nonstoichiometry). In the V2O5–Nb2O5 system, the formation of three compounds is verified, namely, VNbO5 (tetragonal structure), VNb9O25, and V2Nb23O62.5. The first two compounds are isostructural and form a continuous solid solution with tetragonal symmetry. A new compound of the composition Mo3NbVO14 – δ has been synthesized. This compound is isostructural to the Mo3Nb2O14 compound described in the literature and forms a tetragonal solid solution with it. The phase equilibria in the V2O5−Nb2O5–MoO3 system in the subsolidus region have been determined
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16.

Вид документа : Статья из журнала
Шифр издания : 54/М 74
Автор(ы) : Моисеев Г. К., Ивановский А. Л.
Заглавие : Субсолидусная область и температура эвтектики в некоторых бинарных системах
Параллельн. заглавия :The Subsolidus Region and Eutectic Temperature in Some Binary Systems
Место публикации : Журнал физической химии. - 2007. - Т. 81, № 8. - С. 1370-1374. - ISSN 0044-4537. - ISSN 0044-4537
Примечания : Библиогр.: с. 1374 (7 назв.)
ББК : 54
Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: Выполнены оценки возможности образования твердых растворов в субсолидусной области для 15 бинарных эвтектических систем, в том числе для систем с "вырожденными" эвтектиками. Проанализирована взаимосвязь температуры эвтектического превращения с различными физико-химическими параметрами компонентов систем в эвтектической точке
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17.

Вид документа : Статья из журнала
Шифр издания : 54/K 93
Автор(ы) : Kurlov A. S., Gusev A. I.
Заглавие : Atomic-vacancy ordering in the lowest tungsten carbide W2C
Место публикации : Journal of Experimental and Theoretical Physics. - 2007. - Vol. 105, № 4. - С. 710-721
Примечания : Библиогр. : с. 721 (22 назв.)
ББК : 54
Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ
Ключевые слова (''Своб.индексиров.''): атомно-вакансионное упорядочение--карбид вольфрама
Аннотация: Atomic–vacancy ordering in the lowest tungsten carbide W2C with an L'3-type basic hexagonal structure has been studied by neutron diffraction and X-ray diffraction. In the temperature range 2700–1370 K, the only ordered phase of the lowest tungsten carbide is shown to be the trigonal ε-W2C phase (space group P1m). This trigonal ε-W2 C phase is found to form via a disorder–order phase transition channel, which includes three superstructure vectors (k15(1), k15(2), k17(1) ) of two Lifshitz stars ({k15}, {k17}, and to be described by two long-range order parameters (η15,η17). The distribution function of carbon atoms in the trigonal ε-W2C superstructure is calculated, and the orresponding region of the allowable values of the long-range order parameters η15 and η17 is found. Symmetry analysis of other possible superstructures of the lowest tungsten carbide W2C is performed, and the physically acceptable sequence of phase transformations in W2 C is determined
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18.

Вид документа :
Шифр издания : 54/Z 90
Автор(ы) : Zuev M. G.
Заглавие : Subsolidus Phase Relations in the Al2O3–Li2O–Ta2O5 (Nb2O5) Systems
Место публикации : Russian Journal of Inorganic Chemistry. - 2007. - Vol. 52, № 3. - С. 424-426: il.
Примечания : Bibliogr. : p. 426 (28 ref.)
ISSN: 0036-0236
ББК : 54
Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ
Ключевые слова (''Своб.индексиров.''): субсолидус--фазовые диаграммы--ванадаты--ниобаты--литий
Аннотация: The phase composition has been studied and an equilibrium phase diagram has been designed for the Al2O3–Li2O–R2O5 (R = Ta or Nb) systems in the subsolidus region up to 1000°C and 85 mol % Li2O. New phases with the composition Li1 + xAl1 – xO2 – x, where x = 0–0.67, have been found
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19.

Вид документа : Статья из журнала
Шифр издания : 54/M 78
Автор(ы) : Moiseev G. K., Ivanovskii A. L.
Заглавие : The subsolidus region and eutectic temperature in some binary systems
Место публикации : Russian Journal of Physical Chemistry A. - 2007. - Vol. 81, № 8. - С. 1203-1207
Примечания : Bibliogr. : p. 1207 (7 ref.)
ISSN: 0036-0244
ББК : 54
Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ
Ключевые слова (''Своб.индексиров.''): субсолидус--эвтектика--бинарные системы
Аннотация: The possibility of formation of solid solutions in the subsolidus region was estimated for 15 binary eutectic systems, including systems with idegeneratei eutectics. Interrelations between the eutectic transition temperature and various hysicochemical parameters of system components at the eutectic point are analyzed
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20.

Вид документа : Статья из журнала
Шифр издания : 54/G 51
Автор(ы) : Vyatchina V. G., Perelyaeva L. A., Zuev M. G., Mamoshin V. L., Baklanova I. V.
Заглавие : Glass formation and vibrational spectra of glasses in the RSO4-Na2B4O7-K2SO4 (R = Mg, Ca, Sr, Ba) systems
Место публикации : Glass Physics and Chemistry. - 2006. - Vol. 32, № 6. - С. 634-637
Примечания : Библиогр. : с. 637 (10 назв.)
ББК : 54
Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: The regions of glass formation in the RSO4-Na2B4O7-K2SO4 (R = Mg, Ca, Sr, Ba) systems are determined. These regions are completely concentrated in the borate-rich region of the concentration triangle and occupy approximately 20% of the triangle area. The IR and Raman spectra of the glasses under investigation are recorded. It is revealed that the vibrational spectra of the glasses depend on the type of alkaline-earth metal cation. It is assumed that the structure of the glasses is determined by the glass-forming borate motifs with embedded sulfate anion tetrahedra.
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