Production of Nanosilica from Iron Tailing and Characterization

2011 ◽  
Vol 295-297 ◽  
pp. 282-285
Author(s):  
Feng Feng Li ◽  
Ming Xi Zhang ◽  
Yi Shen ◽  
Du Jiao ◽  
Gui Qin Hou ◽  
...  
Keyword(s):  
Thermal Analysis ◽  
High Temperature ◽  
Silicon Dioxide ◽  
Chemical Deposition ◽  
Deposition Method ◽  
Analysis Techniques ◽  
Chemical Deposition Method ◽  
Ft Ir ◽  
Thermal Analysis Techniques ◽  
Amorphous Matter

Nanosilica was extracted from iron tailing by the chemical deposition method, involving pickling, filters washing, alkali dissolving of pickling dregs in high temperature, precipitating silica controlled by diluted acid and so on. The product has been studied by SEM, XRD, FT-IR, and thermal analysis techniques, etc. These study shows that the nanosilica is a kind of amorphous matter consists of hydrous silicon dioxide (97.076%) with small amount of sodium and aluminum trapped inside the Si–O network. The diameter of globular silica particles is 30-50 nm.

Production of Nanoaluminium Hydroxide from Iron Tailing and Characterization

2011 ◽  
Vol 393-395 ◽  
pp. 907-910
Author(s):  
Feng Feng Li ◽  
Ming Xi Zhang ◽  
Jiao Du ◽  
Gui Qin Hou ◽  
Yi Shen
Keyword(s):  
Chemical Deposition ◽  
Experimental Results ◽  
Deposition Method ◽  
Structure Morphology ◽  
The Future ◽  
Chemical Deposition Method ◽  
Ft Ir

Nanoaluminum hydroxide was extracted from iron tailing by the chemical deposition method and the structure, morphology and purity of product was attributed by XRF, FE-SEM, XRD, FT-IR, and DTA-TG, etc. The experimental results showed that the product was spherical in shape with granular size around 100-200nm in diameter. These results indicated that this technique is fit for commerial run to utilize iron tailing as a potential alumina resource in the future.

Crystal/Glass Phase Change in KSb5S8Studied through Thermal Analysis Techniques

2004 ◽  
Vol 16 (10) ◽  
pp. 1932-1937 ◽  
Author(s):  
K. Chrissafis ◽  
Theodora Kyratsi ◽  
K. M. Paraskevopoulos ◽  
Mercouri G. Kanatzidis
Keyword(s):  
Thermal Analysis ◽  
Phase Change ◽  
Glass Phase ◽  
Crystal Glass ◽  
Analysis Techniques ◽  
Thermal Analysis Techniques

scholarly journals Characterization of poled and non-poled β-PVDF films using thermal analysis techniques

2004 ◽  
Vol 424 (1-2) ◽  
pp. 201-207 ◽  
Author(s):  
V. Sencadas ◽  
S. Lanceros-Méndez ◽  
J.F. Mano
Keyword(s):  
Thermal Analysis ◽  
Analysis Techniques ◽  
Thermal Analysis Techniques

Enhanced flux pinning in YBa2Cu3O7 layers by the formation of nanosized BaHfO3 precipitates using the chemical deposition method

2007 ◽  
Vol 90 (10) ◽  
pp. 102505 ◽  
Author(s):  
S. Engel ◽  
T. Thersleff ◽  
R. Hühne ◽  
L. Schultz ◽  
B. Holzapfel ◽  
...  
Keyword(s):  
Flux Pinning ◽  
Chemical Deposition ◽  
Deposition Method ◽  
Chemical Deposition Method

Can We Trust on the Thermal Analysis of Metal Organic Powders for thin film preparation?

2012 ◽  
Vol 1449 ◽  
Author(s):  
Jordi Farjas ◽  
Daniel Sanchez-Rodriguez ◽  
Hichem Eloussifi ◽  
Raul Cruz Hidalgo ◽  
Pere Roura ◽  
...  
Keyword(s):  
Thin Film ◽  
Thermal Analysis ◽  
Thermal Analyses ◽  
Heat And Mass Transport ◽  
Analysis Techniques ◽  
Thin Film Preparation ◽  
Metal Organic ◽  
Organic Precursors ◽  
Film Preparation ◽  
Thermal Analysis Techniques

ABSTRACTThermal analysis techniques are routinely applied to characterize the thermal behavior of metal organic precursors used for oxide film preparation. Since the mass of films is very low, researchers do their thermal analyses on powders and consider that the results are representative of films. We will show here that, in general, this assumption is not true. Several examples involving precursors of YBa2Cu3O7-x (Ba and Y trifluoroacetates and Ba propionate) will serve to appreciate that films can behave very differently than powders due to their enhanced heat and mass transport paths. Ultimately, we will demonstrate that, in some cases, relying on powders thermal analysis may lead to erroneous conclusions.

scholarly journals Heat transfer simulation of the cure of thermoplastic particle interleaf carbon fibre epoxy prepregs

2018 ◽  
Vol 53 (15) ◽  
pp. 2053-2064 ◽  
Author(s):  
Tassos Mesogitis ◽  
James Kratz ◽  
Alex A Skordos
Keyword(s):  
Heat Transfer ◽  
Thermal Analysis ◽  
Sensitivity Study ◽  
Process Models ◽  
Analysis Techniques ◽  
New Class ◽  
Thermosetting Polymers ◽  
Heat Transfer Simulation ◽  
Thermal Analysis Techniques ◽  
Semi Empirical

Thermochemical properties are needed to develop process models and define suitable cure cycles to convert thermosetting polymers into rigid glassy materials. Uncertainty surrounding the suitability of thermal analysis techniques and semi-empirical models developed for conventional composite materials has been raised for the new class of particle interleaf materials. This paper describes kinetics, conductivity, heat capacity and glass transition temperature measurements of HexPly® M21 particle interleaf material. Thermal models describing conventional, non-particle epoxy systems were fit to the data and validated through a thick-section cure. Results from curing experiments agree with heat transfer simulation predictions, indicating that established thermal analysis techniques and models can describe polymerisation and evolving material properties during processing of a material representing the class of interleaf toughened systems. A sensitivity study showed time savings up to about 20%, and associated energy-efficiency-productivity benefits can be achieved by using cure simulation for particle interleaf materials.

Characterization of Sol Gel Prepared KTN Thin Films and Powders by Raman, XRD, and Thermal Analysis Techniques.

2002 ◽  
Vol 718 ◽  
Author(s):  
A.A. Savvinov ◽  
S.B. Majumder ◽  
R.S. Katiyar
Keyword(s):  
Thin Films ◽  
Thermal Analysis ◽  
Sol Gel ◽  
Dynamic Effect ◽  
Orthorhombic Phase ◽  
Analysis Techniques ◽  
Perovskite Materials ◽  
Wide Range ◽  
Thermal Analysis Techniques ◽  
And Inversion

AbstractThe renewed interest in KTa1-xNbxO (KTN) mixed perovskite materials is connected with their remarkable dielectric properties in the dilute compositions. KTN thin films with x = 0.35 have been prepared on different substrates by sol-gel technique as well as a set of powders with x = 0, 0.05, 0.1, 0.25, 0.48, 0.65, 0.75, and 1. Properties of the material change drastically with the change of x, because of relaxation of both translational and inversion symmetry due to a static disorder in the Nb distribution and the dynamic effect of a precursor ferroelectric order above Tc. Special attention was paid to the characteristic feature of coupling of the single-phonon state to a two-acoustic-phonon feature through anharmonic terms in the potential function as well as behavior of the TO3 mode which becomes a narrow peak of the first-order scattering in the tetragonal ferroelectric phase and shows a tendency to split below Tc2 in the orthorhombic phase. The wide range of x allows better understanding of dynamic processes in the KTN bulk materials which in turn helps in the studies of thin films. The above mentioned materials were studied using Raman scattering, XRD, and thermal analysis techniques.

scholarly journals Sulfided Mo/Al2O3 hydrodesulfurization catalyst prepared by ethanol-assisted chemical deposition method

2013 ◽  
Vol 34 (4) ◽  
pp. 659-666 ◽  
Author(s):  
Gang SHI ◽  
Wei HAN ◽  
Pei YUAN ◽  
Yu FAN ◽  
Xiaojun BAO
Keyword(s):  
Chemical Deposition ◽  
Deposition Method ◽  
Chemical Deposition Method
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