Structural, magnetic, and electronic properties of iron selenide Fe6-7Se8 nanoparticles obtained by thermal decomposition in high-temperature organic solvents

2014 ◽  
Vol 141 (4) ◽  
pp. 044704 ◽  
Author(s):  
I. S. Lyubutin ◽  
Chun-Rong Lin ◽  
K. O. Funtov ◽  
T. V. Dmitrieva ◽  
S. S. Starchikov ◽  
...  
Keyword(s):  
Thermal Decomposition ◽  
High Temperature ◽  
Electronic Properties ◽  
Organic Solvents ◽  
Iron Selenide

scholarly journals High Temperature Degradation Mechanism of Concrete with Plastering Layer

Materials ◽  
2022 ◽  
Vol 15 (2) ◽  
pp. 398
Author(s):  
Chihao Liu ◽  
Jiajian Chen
Keyword(s):  
Mechanical Properties ◽  
Mechanical Property ◽  
Thermal Decomposition ◽  
Electron Microscope ◽  
High Temperature ◽  
Thermogravimetric Analysis ◽  
Degradation Mechanism ◽  
Cement Ratio ◽  
Water Cement Ratio ◽  
Scanning Electron

At present, the research on the high temperature degradation of concrete usually focuses on only the degradation of concrete itself without considering the effect of the plastering layer. It is necessary to take into account the influence of the plastering layer on the high temperature degradation of concrete. With an increase in the water/cement ratio, the explosion of concrete disappeared. Although increasing the water/cement ratio can alleviate the cracking of concrete due to lower pressure, it leads to a decrease in the mechanical properties of concrete after heating. It is proved that besides the water/cement ratio, the apparent phenomena and mechanical properties of concrete at high temperature can be affected by the plastering layer. The plastering layer can relieve the high temperature cracking of concrete, and even inhibit the high temperature explosion of concrete with 0.30 water/cement ratio. By means of an XRD test, scanning electron microscope test and thermogravimetric analysis, it is found that the plastering layer can promote the rehydration of unhydrated cement particles of 0.30 water/cement ratio concrete at high temperature and then promote the mechanical properties of concrete at 400 °C. However, the plastering layer accelerated the thermal decomposition of C-S-H gel of concrete with a water/cement ratio of 0.40 at high temperature, and finally accelerate the decline of mechanical property of concrete. To conclude, the low water/cement ratio and plastering layer can delay the deterioration of concrete at high temperature.

scholarly journals High-temperature heterogeneous catalysis in platinum nanoparticle – molten salt suspensions

2020 ◽  
Vol 10 (3) ◽  
pp. 625-629
Author(s):  
Behzad Tangeysh ◽  
Clarke Palmer ◽  
Horia Metiu ◽  
Michael J. Gordon ◽  
Eric W. McFarland
Keyword(s):  
Thermal Stability ◽  
Thermal Decomposition ◽  
High Temperature ◽  
Heterogeneous Catalysis ◽  
Co Oxidation ◽  
Molten Salt ◽  
Platinum Nanoparticles ◽  
Platinum Nanoparticle ◽  
Oxidation Activity

Suspensions of platinum nanoparticles (PtNPs) were formed in molten LiCl–LiBr–KBr via thermal decomposition of H2PtCl6, and subsequently evaluated for thermal stability and CO oxidation activity.

High-pressure and high-temperature multianvil synthesis of metastable polymorphs ofBi2O3: Crystal structure and electronic properties

2010 ◽  
Vol 82 (2) ◽  
Author(s):  
S. Ghedia ◽  
T. Locherer ◽  
R. Dinnebier ◽  
D. L. V. K. Prasad ◽  
U. Wedig ◽  
...  
Keyword(s):  
Crystal Structure ◽  
High Pressure ◽  
High Temperature ◽  
Electronic Properties

High temperature direct probe for MS and its use for thermal decomposition monitoring

Vacuum ◽  
2005 ◽  
Vol 80 (1-3) ◽  
pp. 247-252 ◽  
Author(s):  
S. Bohátka ◽  
Gy. Szöo˝r ◽  
Gy. Czél ◽  
É. Balázs
Keyword(s):  
Thermal Decomposition ◽  
High Temperature

scholarly journals Macroporous Oil-Sorbents with a High Absorption Capacity and High-Temperature Tolerance Prepared through Cryo-Polymerization

Polymers ◽  
2019 ◽  
Vol 11 (10) ◽  
pp. 1620 ◽  
Author(s):  
Haleem ◽  
Wang ◽  
Li ◽  
Hu ◽  
Li ◽  
...  
Keyword(s):  
High Temperature ◽  
Organic Solvents ◽  
Thermo Gravimetric Analysis ◽  
Temperature Tolerance ◽  
Absorption Capacity ◽  
Synthesis Process ◽  
Gravimetric Analysis ◽  
High Temperature Tolerance ◽  
Oil Sorbents ◽  
High Absorption

The facile preparation and admirable performance of macro-porous poly(lauryl acrylate)-based oil-sorbents for organic solvents and oils are reported in this manuscript. Cryo-polymerizations of lauryl acrylate (LA) with ethylene glycol dimethacrylate (EGDMA) as the cross-linker were carried out at temperatures below the freezing point of the polymerization mixture. The polymerization medium and pore-forming agent was 1,4-dioxane. The influences of the total monomer concentration, EGDMA content and cryo-polymerization temperature on the structure of the obtained P(LA-co-EGDMA) cryogels were investigated with the techniques of Fourier transform infrared spectroscopy, scanning electron microscopy, contact angle measurement and thermo-gravimetric analysis. Through the modulation of the crosslinking density and porosity of these cryogels, the P(LA-co-EGDMA) oil-sorbents demonstrated a high absorption capacity for organic solvents and oils, recyclability and high-temperature tolerance. The absorption capacity reached 20–21 and 16–17 g/g for toluene and gasoline oil, respectively. Those fabricated sorbents survived high temperatures up to 150 °C without any change in absorption capacity as well as porosity. Considering the convenient synthesis process and absorption performance, the present work offers a remarkable opportunity to bring polymer cryogels to practical application in waste oil clean-up.

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