scholarly journals BEHAVIOUR AND NATURE OF DISINTEGRATION OF SLID SOLUTIONS BASED ON SODIUM AND CALCIUM SULPHATES IN TERNARY SULPHATE SYSTEMS

2017 ◽  
Vol 14 (27) ◽  
pp. 123-130
Author(s):  
A. M. GASANALIEV ◽  
B. Yu. GAMATAEVA ◽  
P. N. GASANALIEVA ◽  
G. S. GAMATAEV ◽  
A. S. TRUNIN
Keyword(s):  
Thermal Analysis ◽  
Differential Thermal Analysis ◽  
Solid Solutions ◽  
Ternary Systems ◽  
Chemical Systems ◽  
The Third ◽  
Physical Chemical ◽  
Visual Polythermal Analysis ◽  
Physical And Chemical ◽  
First Time

Information on phase formation in complex physical-chemical systems is the basis for the synthesis of new phases and thus informational-logical basis for the developing of new polyfunctional materials. For the first time set of sulfate-containing ternary systems was studied using a complex of methods for physical and chemical analysis, such as differential thermal analysis (DTA), visual-polythermal analysis (VPA). The nature of solid solutions based on Na2SO4–CaSO4 was identified; the values of force fields were calculated by Goldschmidt’s formula. The influence of the third component (М2SO4 (М-Li,K,Rb,Cs,Tl(I)) on the behavior and disintegration of these solid solutions was determined.

Zeolites Fit For A Crown: Probing Host-Guest Interactions with Thermogravimetric Methods

2018 ◽  
Author(s):  
Asel Sartbaeva ◽  
Paul R. Raithby ◽  
Remi Castaing ◽  
Antony Nearchou
Keyword(s):  
Mass Spectrometry ◽  
Thermal Analysis ◽  
Differential Thermal Analysis ◽  
Petrochemical Industry ◽  
Rational Use ◽  
New Methodologies ◽  
First Time ◽  
Kinetics Of

Through a combination of thermogravimetry, mass spectrometry and differential thermal analysis, we demonstrate for the first time that all four zeolites show experimental differences in their host-guest interactions with 18C6. In addition, we have estimated the kinetics of 18C6 decomposition, which is a technique that has not been applied to zeolites previously. Using these findings as a toolkit, a more rational use of OSDAs can be utilised to prepare designer zeolites. Furthermore, the new methodologies presented herein can be applied to current zeolites, such as MFI-type zeolites used in the petrochemical industry.

The Roman Ceramics of Salobrena (Granada-Spain) and their Raw Materials

1992 ◽  
Vol 267 ◽  
Author(s):  
Ana M De Andres ◽  
Isabel MuÑOZ
Keyword(s):  
Thermal Analysis ◽  
Differential Thermal Analysis ◽  
Raw Materials ◽  
Third Century ◽  
Western Coast ◽  
X Ray Diffraction ◽  
X Ray ◽  
The Third ◽  
Good Number ◽  
Scanning Electron

ABSTRACTNineteen roman ceramic sherds found near Salobreña (Granada, Spain), in the western coast of the Mediterranean Sea, as well as different ceramic clays from the surroundingsare studied. Both clays and ceramic sherds are characterizad by X-ray diffraction and spectrometry, differential thermal analysis, and scanning electron and optical microscopies. A good number of the ceramic pieces, among which some “Terrae Sigillatae”, have a composition similar to that of the local clays and, thus, have been probably manufactured at Salobreña. Only a few of them have a foreign origin. For most of them, the firing temperature was about 800-850 °C, although some have been produced at 900-1000 °C, and some others at 1000-1100 °C. It is concluded that Salobreña appearsto have been an important settlement just in the third century of the Christian era.

Preparation of Glass-Ceramics Using Molybdenum Tailings

2011 ◽  
Vol 284-286 ◽  
pp. 1431-1434 ◽  
Author(s):  
Jin Rui Zhang ◽  
Ru Wang
Keyword(s):  
Heat Treatment ◽  
Thermal Analysis ◽  
Differential Thermal Analysis ◽  
Crystalline Phase ◽  
Glass Ceramics ◽  
Chemical Properties ◽  
The Other ◽  
Raw Material ◽  
Physical Chemical ◽  
Nucleation Agents

In order to utilization the molybdenum tailings which be deposited in large quantities. Test used it to prepare glass-ceramics as main raw material, TiO2 as nucleation agents and CaO-Al2O3-SiO2 system and wollastonite as the principal crystalline phase. Heat treatment system of glass-ceramics was based on the differential thermal analysis. The crystalline phase, microstructure and characteristics of glass-ceramics were analysis by XRD, SEM and physical, chemical properties test. The result shows that the performance of glass-ceramics was superior to the other types of building decoration stone.

scholarly journals SOLUBILITY OF GERMANIUM DISELENIDE IN THE Cu3AsSe4

2021 ◽  
Vol 0 (4) ◽  
pp. 67-70
Author(s):  
Z.T. Hasanova ◽  
Keyword(s):  
Thermal Analysis ◽  
Differential Thermal Analysis ◽  
Phase Equilibria ◽  
Solid Solutions ◽  
X Ray Diffraction ◽  
X Ray

Differential thermal analysis and powder X-ray diffraction methods were used for phase equilibria studying in the Cu3AsSe4-GeSe2 system. It was established that wide (up to 30 mol.%) solid solutions based on Cu3AsSe4 are formed. GeSe2-rich alloys consist of various heterogeneous mixtures, including phases outside the T–x plane of this section

Surface Tension of KPO3-WO3 Melts

2008 ◽  
Vol 63 (1-2) ◽  
pp. 61-65
Author(s):  
Vladyslav V. Lisnyak ◽  
Mykola S Slobodyanik ◽  
Nataliya V. Stus
Keyword(s):  
Thermal Analysis ◽  
Surface Tension ◽  
Differential Thermal Analysis ◽  
Linear Dependence ◽  
Molar Fraction ◽  
Molar Content ◽  
Melting Points ◽  
The Third ◽  
Congruently Melting ◽  
Concentration Dependences

The temperatures Tliq of molten xWO3-(1−x)KPO3 mixtures with a molar content between x = 0 and x=0.60 have been determined by differential thermal analysis. The surface tension of the xWO3- (1−x)KPO3 melts in the interval from x = 0 to x = 0.5 has been measured by ring tensiometry for temperatures 10 K- 20 K above the melting points, up to 1373 K. The data obtained for KPO3 were fitted by a linear dependence on the temperature and compared with data available in the literature. The surface tension of the xWO3-(1−x)KPO3 melts was found to decrease non-monotonously with x. Three bends at x ~ 0.15, 0.30, and 0.45 were observed in the surface tension vs. molar fraction curve. The first and the third bends correspond to eutectic compositions; the second one is related to the formation of congruently melting K2WO2P2O7. Equations describing the temperature and concentration dependences of the surface tension are proposed.

scholarly journals Люминесцентные свойства разнолигандных beta-дикетонатов неодима, полученных в среде сверхкритического диоксида углерода в полимерных матрицах различной природы

2020 ◽  
Vol 129 (7) ◽  
pp. 869
Author(s):  
В.С. Каплин ◽  
А.С. Копылов ◽  
Т.С. Зархина ◽  
П.С. Тимашев ◽  
А.Б. Соловьева
Keyword(s):  
Carbon Dioxide ◽  
Thermal Analysis ◽  
Differential Thermal Analysis ◽  
Polymer Matrix ◽  
Supercritical Co2 ◽  
Binary Systems ◽  
Ternary Systems ◽  
Mixed Ligand ◽  
Luminescence Spectra

Multi-ligand phosphor complexes of neodymium acetylacetonate with phenanthroline are synthesized in polymer matrices (oligourethane methacrylate, fluoroplast, polycarbonate) in supercritical carbon dioxide medium. At the same time the role of one of the ligands in such complexes is played by fragments of the polymer matrix. The luminescence spectra of the obtained ternary systems are described. It was shown that the position of the luminescence maxima is bathochromically shifted relative to the binary systems Nd(Acac)3/polymer obtained in a similar way and the magnitude of the shift depends on the nature of the polymer matrix. It was shown that upon the introduction of these components into polymers from a solution, similar phosphor mixed-ligand neodymium complexes do not form. The formation of new structures Nd(Acac)3/Phen/polymer upon impregnation of oligourethane methacrylate with neodymium β-diketonate and phenanthroline in a supercritical CO2 medium was confirmed by the method of differential thermal analysis. The same method confirmed that with the introduction of these components from the solution of the above systems do not form.

Study of Chemical and Physical Characterization of the Natural Dolomite of Ain Mlila-Algeria

2021 ◽  
Vol 406 ◽  
pp. 481-491
Author(s):  
K. Abdellaoui ◽  
A. Boumaza ◽  
N. Kamoun
Keyword(s):  
Thermal Analysis ◽  
Differential Thermal Analysis ◽  
Calcium Carbonate ◽  
Physical Characterization ◽  
Physical Chemical ◽  
Geological Conditions ◽  
Chemical Techniques ◽  
Eastern Algeria ◽  
Extrinsic Defects

Dolomite is one of the commonest minerals that abound in the formation of a number of geological conditions. And it is found in abundance in eastern Algeria, especially Ain Mlila-Wilaya of Oum El Bouaghi-Algeria. The analyzed sample of raw dolomite has been by various physical-chemical techniques. The constituents of these carbonates are Ca, Mg, C, O, Al, Si, Fe, Ba, F, and Sr, analysis by XRD, and Raman, show that in addition to CaMg(CO3)2, we may have calcium carbonate. The Photoluminescence analysis characterizes the intrinsic and extrinsic defects of this carbonate. Differential thermal analysis reveals the different transformations of this mineral during heating. Indeed several stages including the elimination of water, the departure of CO2, the formation of MgO, and finally the formation of CaO.

Phase relations of the Ce2Co17–Sm2Co17 pseudo-binary system

2020 ◽  
Vol 111 (5) ◽  
pp. 373-378
Author(s):  
Chengfu Xu ◽  
Zhengfei Gu ◽  
Yongquan Yang ◽  
Dongdong Ma ◽  
Gang Cheng ◽  
...  
Keyword(s):  
Thermal Analysis ◽  
Differential Thermal Analysis ◽  
Powder Diffraction ◽  
Solid Solutions ◽  
Vertical Section ◽  
Analysis Data ◽  
Phase Relations ◽  
Differential Thermal Analysis Data ◽  
Pseudobinary System ◽  
X Ray

Abstract The phase relations in the Ce2Co17-Sm2Co17 system over the whole concentration range have been studied by means of Xray powder diffraction, differential thermal analysis and scanning electron microscopy equipped with energy dispersive Xray spectroscopy. The X-ray powder diffraction results reveal that all the alloys (Ce1-xSmx)2Co17 are similar to the end member of the investigated system, Sm2Co17. It is implied that continuous solid solutions are formed in this system. The lattice parameters and unit cell volumes of (Ce1-xSmx)2Co17 solid solutions increase linearly with x increasing from 0 to 1.0. The occurrence of the polymorphic transformation reaction α-(Ce, Sm)2Co17 = β-(Ce, Sm)2Co17 is confirmed in the Ce2Co17-Sm2Co17 system, but its transition temperature cannot be determined. The differential thermal analysis measurements show that both the decomposition temperature and the Curie temperature of the (Ce1-xSmx)2Co17 alloys increase gradually with increasing Sm content. Based on the X-ray powder diffraction results and differential thermal analysis data, the tentative vertical section of Ce2Co17-Sm2Co17 pseudobinary system has been constructed.

Aguilarite from the Camoola Reef, Maratoto Valley, New Zealand

1972 ◽  
Vol 38 (300) ◽  
pp. 961-964 ◽  
Author(s):  
J. V. Main ◽  
K. A. Rodgers ◽  
H. W. Kobe ◽  
C. P. Woods
Keyword(s):  
Thermal Analysis ◽  
Differential Thermal Analysis ◽  
New Zealand ◽  
Type Locality ◽  
Chemical Data ◽  
Synthetic Material ◽  
Vein Deposit ◽  
Hydrothermal Vein ◽  
Native Silver ◽  
Physical And Chemical

SummaryAguilarite, Ag4SeS, occurs in a hydrothermal vein deposit associated with sphalerite, chalcopyrite, galena, and native silver. Physical and chemical data agree with descriptions from Guanajuato (type locality). Differential thermal analysis of synthetic material indicates an inversion temperature of 122±1 °C. The mineral crystallized late in the paragenetic sequence, probably slightly above 200 °C.

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