Synthesis and characterization of mullite–zirconia nanostructured composite by combined mechanical activation and reaction sintering

2015 ◽  
Vol 26 (5) ◽  
pp. 1452-1457 ◽  
Author(s):  
H. Ashrafi ◽  
R. Emadi ◽  
R. Zamani Foroushani
Keyword(s):  
Mechanical Activation ◽  
Synthesis And Characterization ◽  
Reaction Sintering ◽  
Nanostructured Composite

scholarly journals Synthesis and characterization of some nanostructured composite oxides for low temperature catalytic combustion of dilute propane

RSC Advances ◽  
2017 ◽  
Vol 7 (45) ◽  
pp. 27863-27871 ◽  
Author(s):  
C. Doroftei ◽  
L. Leontie
Keyword(s):  
Low Temperatures ◽  
Catalytic Combustion ◽  
Sol Gel ◽  
Catalytic Performance ◽  
Synthesis And Characterization ◽  
Propane Combustion ◽  
Nanostructured Composite ◽  
Composite Oxides ◽  
Combustion Technique

Five nanosized perovskite and four ferrospinel powders were prepared by sol–gel self-combustion technique. The La0.6Pb0.2Mg0.2MnO3 perovskite was found to exhibit the best catalytic performance with respect to propane combustion at low temperatures.

Preparation of a nanostructured organoceramic and its reversible interlayer expansion

1999 ◽  
Vol 14 (2) ◽  
pp. 315-318 ◽  
Author(s):  
Phillip B. Messersmith ◽  
Paul Osenar ◽  
Samuel I. Stupp
Keyword(s):  
Calcium Aluminate ◽  
Inorganic Ions ◽  
Interlayer Spacing ◽  
Organic Polymer ◽  
Synthesis And Characterization ◽  
Poly Vinyl Alcohol ◽  
Phase Synthesis ◽  
Nanostructured Composite ◽  
Hydrated Calcium

We described previously the liquid phase synthesis and characterization of a nanostructured composite from an aqueous solution containing organic polymer and inorganic ions [J. Mater. Res. 7, 2599 (1992)]. The nanocomposite, termed an organoceramic, consisted of poly(vinyl alcohol) chains intercalated between the principal layers of a hydrated calcium aluminate ceramic. A key structural feature of the organoceramic is the polymer-induced expansion of the interlayer spacing by approximately 10 Å compared to the unmodified ceramic. In this paper, we describe the synthetic scheme that favors organoceramic formation and prove the existence of intercalated polymer by observation of reversible interlayer expansion and contraction in response to changes in ambient humidity. This property is unique to the organoceramic and is not observed in the unmodified calcium aluminate ceramic.

Synthesis and characterization of massive molybdenum carbides and supported carbide-containing catalysts Mo2C/C prepared through mechanical activation

2014 ◽  
Vol 6 (1) ◽  
pp. 8-16 ◽  
Author(s):  
A. V. Vasilevich ◽  
O. N. Baklanova ◽  
A. V. Lavrenov ◽  
O. A. Knyazheva ◽  
T. I. Gulyaeva ◽  
...  
Keyword(s):  
Mechanical Activation ◽  
Synthesis And Characterization ◽  
Molybdenum Carbides

scholarly journals Synthesis and Characterization of Mesoporous Silica from Anorthite-Clay Mineral: Role of Mechanical Activation

2014 ◽  
Vol 55 (12) ◽  
pp. 1895-1899 ◽  
Author(s):  
Junhyun Choi ◽  
Yosep Han ◽  
Donghyun Kim ◽  
Soyeon Park ◽  
Jayhyun Park ◽  
...  
Keyword(s):  
Mesoporous Silica ◽  
Mechanical Activation ◽  
Clay Mineral ◽  
Synthesis And Characterization

Synthesis and Characterization of Glass and Glass-Ceramic Materials of the System SiO2-Fe2O3-BaO-Al2O3

2012 ◽  
Vol 1373 ◽  
Author(s):  
O.I. Pánuco-Valdés ◽  
J. López-Cuevas ◽  
J.L. Rodríguez-Galicia
Keyword(s):  
Compressive Strength ◽  
Mechanical Activation ◽  
Glass Ceramics ◽  
Ceramic Materials ◽  
High Energy ◽  
Synthesis And Characterization ◽  
Attrition Mill ◽  
Thermal Crystallization ◽  
Glass Ceramic Materials

ABSTRACTThe effect of mechanical activation on the crystallization of glasses of the system SiO2-Fe2O3-BaO-Al2O3 is investigated. The ceramic-glasses are synthesized from silica and iron-rich Ferro-Titanium-Zirconiferous (FTZ) sands available in the state of Coahuila, Mexico. The parent glass is subjected to mechanical activation in a high-energy attrition mill during 4 or 8h. Then, both milled and non-milled glasses are subjected to a thermal crystallization treatment at temperatures of 900 or 1000ºC during 2 or 5h. It is found that, in the case of the thermal treatment carried out at 900°C/5h, an increment in the time employed for both the mechanical activation and the crystallization treatment enhanced the crystallization of the parent glasses and produced an increase in the compressive strength of the synthesized glass-ceramics.

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