ChemInform Abstract: X-Ray Structure of Trans-tetrakis(pyrazole)bisisothiocyanatomanganese(II) and its Magnetic, Spectral and Thermal Properties (Molekül- und Kristallstruktur, RG C2/c, Z=4; magnetische Suszeptibilität, IR- und Reflexionsspektrum, TG-Anal

1983 ◽  
Vol 14 (34) ◽  
Author(s):  
P. LUMME ◽  
I. MUTIKAINEN ◽  
E. LINDELL
Keyword(s):  
Thermal Properties ◽  
X Ray ◽  
Magnetische Suszeptibilität

scholarly journals Inverse Design of Fe-Based Bulk Metallic Glasses Using Machine Learning

Metals ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 729
Author(s):  
Junhyub Jeon ◽  
Namhyuk Seo ◽  
Hwi-Jun Kim ◽  
Min-Ha Lee ◽  
Hyun-Kyu Lim ◽  
...  
Keyword(s):  
Thermal Properties ◽  
Metallic Glasses ◽  
Alloy Composition ◽  
Relevant Literature ◽  
Bulk Metallic Glasses ◽  
X Ray Diffraction ◽  
X Ray ◽  
Ann Models ◽  
Wide Scale ◽  
Artificial Neural Network Ann

Fe-based bulk metallic glasses (BMGs) are a unique class of materials that are attracting attention in a wide variety of applications owing to their physical properties. Several studies have investigated and designed the relationships between alloy composition and thermal properties of BMGs using an artificial neural network (ANN). The limitation of the wide-scale use of these models is that the required composition is yet to be found despite numerous case studies. To address this issue, we trained an ANN to design Fe-based BMGs that predict the thermal properties. Models were trained using only the composition of the alloy as input and were created from a database of more than 150 experimental data of Fe-based BMGs from relevant literature. We adopted these ANN models to design BMGs with thermal properties to satisfy the intended purpose using particle swarm optimization. A melt spinner was employed to fabricate the designed alloys. X-ray diffraction and differential thermal analysis tests were used to evaluate the specimens.

scholarly journals Investigation and Possibilities of Reuse of Carbon Dioxide Absorbent Used in Anesthesiology

Materials ◽  
2020 ◽  
Vol 13 (21) ◽  
pp. 5052
Author(s):  
Bartłomiej Rogalewicz ◽  
Agnieszka Czylkowska ◽  
Piotr Anielak ◽  
Paweł Samulkiewicz
Keyword(s):  
Carbon Dioxide ◽  
Thermal Properties ◽  
Powder Diffraction ◽  
Soda Lime ◽  
Closed Circuit ◽  
Carbon Dioxide Absorption ◽  
X Ray ◽  
Kinetics Of ◽  
Carbon Dioxide Absorbent

Absorbents used in closed and semi-closed circuit environments play a key role in preventing carbon dioxide poisoning. Here we present an analysis of one of the most common carbon dioxide absorbents—soda lime. In the first step, we analyzed the composition of fresh and used samples. For this purpose, volumetric and photometric analyses were introduced. Thermal properties and decomposition patterns were also studied using thermogravimetric and X-ray powder diffraction (PXRD) analyses. We also investigated the kinetics of carbon dioxide absorption under conditions imitating a closed-circuit environment.

Evaluation of the Addition of α-Al2O3 on the Mechanical and Thermal Properties in Binding Geopolymer

2015 ◽  
Vol 820 ◽  
pp. 497-502 ◽  
Author(s):  
Danubia Lisbôa da Costa ◽  
Rosiane Maria da Costa Farias ◽  
Aluska Nascimento Simões Braga ◽  
Romualdo Rodrigues Menezes ◽  
Gelmires de Araujo Neves
Keyword(s):  
Thermal Analysis ◽  
Thermal Properties ◽  
Construction Industry ◽  
Total Mass ◽  
Mechanical And Thermal Properties ◽  
X Ray ◽  
Total Mass Loss ◽  
Alumina Addition ◽  
Enhanced Properties ◽  
Geopolymer Binder

Several years ago the study on modification of existing materials that have enhanced properties has gained prominence. In this scenario, the geopolymeric binders, currently widely used in the construction industry have emerged. Thus, this study aimed to evaluate the influence of alumina addition on the mechanical and thermal properties of metakaolin in geopolymer binder. The geopolymers were synthesized from mixtures of metakaolin/alumina and sodium hydroxide, pressed and characterized by diffraction of X-ray and differential thermal analysis and thermogravimetric. Two types of alumina were used in different amounts (14% and 7%) in order to evaluate the effect of the load binder obtained. It can be seen that the incorporation of alumina into the system caused an increase in strength of products obtained as well as a reduction in total mass loss of the sample , especially when the use of fine alumina.

X-ray Structure and Thermal Properties of a 1:1 Inclusion Complex Between Permethylated β-Cyclodextrin and Psoralen

2004 ◽  
Vol 16 (6) ◽  
pp. 389-393 ◽  
Author(s):  
Mino R. Caira ◽  
Ferdinando Giordano ◽  
Sibulelo L. Vilakazi
Keyword(s):  
Thermal Properties ◽  
Inclusion Complex ◽  
X Ray

Study of thermal properties of Ga0.5In1.5Se3 by differential scanning calorimetry

2021 ◽  
pp. 2150407
Author(s):  
S. I. Ibrahimova
Keyword(s):  
Crystal Structure ◽  
Differential Scanning Calorimetry ◽  
Thermal Properties ◽  
Thermal Effects ◽  
Room Temperature ◽  
Structural Studies ◽  
X Ray Diffraction ◽  
Hexagonal Symmetry ◽  
Scanning Calorimetry ◽  
X Ray

The crystal structure and thermal properties of the [Formula: see text] compound have been investigated. Structural studies were performed by X-ray diffraction at room temperature. The crystal structure of this compound was found to correspond to the hexagonal symmetry of the space group P61. Thermal properties were studied using a differential scanning calorimetry (DSC). It was found in the temperature range [Formula: see text] that thermal effects occur at temperatures [Formula: see text] and [Formula: see text]. The thermodynamic parameters of these effects are calculated.

A Study of Thermal Properties of Au25Pd75 Alloy Using X-Ray Diffraction

2019 ◽  
Vol 120 (9) ◽  
pp. 844-847
Author(s):  
A. B. Ziya ◽  
A. Aziz ◽  
S. A. Khan ◽  
N. Ahmad
Keyword(s):  
Thermal Properties ◽  
X Ray Diffraction ◽  
X Ray

Energy dispersive x-ray reflectivity technique to study thermal properties of polymer films

2003 ◽  
Vol 94 (5) ◽  
pp. 2882-2887 ◽  
Author(s):  
M. Bhattacharya ◽  
M. Mukherjee ◽  
M. K. Sanyal ◽  
Th. Geue ◽  
J. Grenzer ◽  
...  
Keyword(s):  
Thermal Properties ◽  
Polymer Films ◽  
Energy Dispersive ◽  
X Ray

Synthese, Struktur und thermisches Verhalten von Thiophosphorsäuretriamid SP(NH2)3 [1] / Synthesis, Structure, and Thermal Behaviour of Phosphorothionic Triamide SP(ΝΗ2)3 [1]

1989 ◽  
Vol 44 (8) ◽  
pp. 942-945 ◽  
Author(s):  
Wolfgang Schnick
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonding ◽  
Thermal Properties ◽  
Single Crystal ◽  
Melting Temperature ◽  
Intermolecular Hydrogen Bonding ◽  
X Ray ◽  
Hydrogen Bonding Interactions ◽  
Ray Methods ◽  
Single Bonds

Phosphorothionic triamide SP(NH2)3 is obtained by slow addition of SPCl3 dissolved in dry CH2Cl2 to a satured solution of NH3 in CH2Cl2 at —50°C. Ammonium chloride is removed from the resulting precipitate by treatment with HNEt2 followed by extraction with CH2Cl2. Coarse crystalline SP(NH2)3 is obtained after recrystallization from dry methanol. The crystal structure of SP(NH2)3 has been determined by single crystal X-ray methods (Pbca; a = 922.3(1), b = 953.8(1), c = 1058.4(2) pm, Z = 8). In the crystals the molecules show non-crystallographic point symmetry C8. The P—S bond (195.4(1) pm) is slightly longer than in SPCl3. From P—N bond lengths of about 166 pm a significant electrostatic strengthening of the P—N single bonds is assumed. Weak intermolecular hydrogen bonding interactions (N —H · · · N ≥ 329.5 pm; N — H · · · S ≥ 348.3 pm) are observed.Investigation of thermal properties shows a melting temperature of 115°C for SP(NH2)3. According to combined DTA/TG and MS investigations above this temperature the compound decomposes by evolution of H2S and NH3 to yield amorphous phosphorus(V)nitride.

scholarly journals Copper microsphere hybrid mesoporous carbon as matrix for preparation of shape-stabilized phase change materials with improved thermal properties

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Yi Liu ◽  
Yan Chen ◽  
Junwei Zhang ◽  
Junkai Gao ◽  
Zhi Han
Keyword(s):  
Thermal Properties ◽  
Phase Change ◽  
Photoelectron Spectroscopy ◽  
Mesoporous Carbon ◽  
Phase Change Materials ◽  
Copper Ions ◽  
Thermal Constant ◽  
Step Method ◽  
Scanning Calorimetry ◽  
X Ray

Abstract Copper microsphere hybrid mesoporous carbon (MPC-Cu) was synthesized by the pyrolysis of polydopamine microspheres doped with copper ions that were prepared using a novel, facile and simple one-step method of dopamine biomimetic polymerization and copper ion adsorption. The resulting MPC-Cu was then used as a supporter for polyethylene glycol (PEG) to synthesize shape-stabilized phase change materials (PEG/MPC-Cu) with enhanced thermal properties. PEG/MPC-Cu was studied by scanning electron microscopy, X-ray diffraction, Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, thermogravimetric analysis, differential scanning calorimetry and thermal constant analysis. The results demonstrated that the thermal conductivity of PEG/MPC-Cu was 0.502 W/(m K), which increased by 100% compared to pure PEG [0.251 W/(m K)]. The melting enthalpy of PEG/MPC-Cu was 95.98 J/g, indicating that PEG/MPC-Cu is a promising candidate for future thermal energy storage applications. In addition, the characterization results suggested that PEG-MPC-Cu possessed high thermal stability. Therefore, the method developed in this paper for preparing shape-stabilized phase change materials with improved thermal properties has substantial engineering application prospects.

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