Now showing items 1-10 of 15
Anisotropy of crystallite growth during sintering of SnO2 xerogels
The crytallite and pore-size evolution during isothermal sintering (400 ≤ T ≤ 700°C) of SnO2 xerogels was studied by X-ray line broadening and nitrogen adsorption-desorption isotherms. The experimental results show a strong ...
EXAFS and XRD Study of the Structural Evolution during Isothermal Sintering of SnO2 Xerogels
The formation of an ordered (crystalline) phase during isothermal sintering of SnO2 monolithic xerogels, at 200, 250, 300, 400, 500, 600 and 700°C, has been analyzed by the combined use of EXAFS and XRD techniques. For the ...
Isothermal sintering kinetic of 3YTZ and 8YSZ: Cation diffusion
We have studied the sintering kinetic of 3 and 8 mol% of yttria stabilized zirconia under isothermal conditions. Sintering was performed in the temperature range between 1200 and 1450 °C. The sintering kinetic process was ...
Evolution of the fractal structure during sintering of SnO2 compacted sol-gel powder
The structural evolution during sintering of compacted SnO2 sol-gel powder was investigated using nitrogen adsorption isotherm analysis. Results show that for sintering temperatures up to 400°C the samples have a fractal ...
Effect of atmosphere on the sintering and grain growth of tin oxide
High purity SnO 2 powder (>99.9%) was compacted in cylindrical pellets and sintered in atmospheres of dry argon, argon with water vapor, oxygen and CO 2 using 10 °C/min up to 1200 °C or isotherms in the range of 1000 to ...
Formation of SnO2 supported porous membranes
(Kluwer Academic Publ, 1997-01-01)
In this work, the effect of the substrate microstructure on the formation of SnO2 membranes and of the sintering conditions on their porosity have been analysed. Samples have been prepared by colloidal suspensions cast on ...
POROSITY EVOLUTION IN SNO2 XEROGELS DURING SINTERING UNDER ISOTHERMAL CONDITIONS
(American Physical Soc, 1995-04-01)
Nanopore size growth and ultrafiltration performance of SnO2 ceramic membranes prepared by sol-gel route
(Kluwer Academic Publ, 2000-12-01)
Supported ceramic membranes have been produced by the sol-casting procedure from aqueous colloidal suspensions prepared by the sol-gel route. Coatings on a tubular alumina support have been successfully performed leading ...
Study of structural surface modified tin oxide membrane prepared by sol-gel route sintered at 400 degrees C
(Kluwer Academic Publ, 2003-01-01)
This work describes the chemical modification by Tiron(R) molecules of the surface of SnO2 nanoparticles used to prepare nanoporous membranes. Samples prepared with Tiron(R) content between 1 and 20 wt% and fired at 400 C ...
Dielectric properties of Na1-xLixNbO3 ceramics from powders obtained by chemical synthesis
(Elsevier B.V., 1999-01-01)
Ultra-fine powders of Na1-xLixNbO3 (x=0; 0.06; 0.09; 0.12) were synthesized by the Polymeric Precursors Method. Such powders had their orthorhombic structures determined by X-ray diffraction and their surface area determined ...