P-Doped SnO2 Powder as a Support for PEFC Cathode

2020 ◽  
Vol 98 (9) ◽  
pp. 565-572
Author(s):  
Yuta Inoue ◽  
Koichi Matsuzawa ◽  
Yongbing MA ◽  
Yoshiro Ohgi ◽  
Takaaki Nagai ◽  
...  
Keyword(s):  
Sno2 Powder

scholarly journals Synthesis of nanocrystalline SnO2 powder at 100°C

2004 ◽  
Vol 27 (3) ◽  
pp. 221-222 ◽  
Author(s):  
Sanjay R. Dhage ◽  
S. P. Gaikwad ◽  
Violet Samuel ◽  
V. Ravi
Keyword(s):  
Sno2 Powder

Synthesis of nanocrystalline SnO2 powder by amorphous citrate route

2003 ◽  
Vol 57 (9-10) ◽  
pp. 1604-1611 ◽  
Author(s):  
Mahesh Bhagwat ◽  
Pallavi Shah ◽  
Veda Ramaswamy
Keyword(s):  
Sno2 Powder

A Study on the Development of Environment-Friendly Ag-SnO2 Electric Contact Materials through a Powder Metallurgy

2007 ◽  
Vol 539-543 ◽  
pp. 2761-2766 ◽  
Author(s):  
Hoon Cho ◽  
Duck Young Hwang ◽  
Hyung Ho Jo
Keyword(s):  
Powder Metallurgy ◽  
Manufacturing Process ◽  
Electrical Contact ◽  
Image Analyzer ◽  
Contact Material ◽  
Electric Contact ◽  
Contact Materials ◽  
Grain Distribution ◽  
Sno2 Powder ◽  
Electric Contact Material

It is generally known that Ag-CdO electric contact material excels others in characteristics. Thus, the contact material has been widely used, regardless of current strength. However, in a view point of environment, the advanced electric contact material without environmental load element such as cadmium has to be developed. Extensive studies have been carried out on Ag-SnO2 electric contact material as a substitute of Ag-CdO contact materials. In the manufacturing process of Ag-SnO2 electric contact material, it can be mentioned that typical internal oxidation process is not suitable to produce Ag-SnO2 electric contact material because the Sn located around surface may interrupt oxidation of Sn in the middle of material. Therefore, in the present study, powder metallurgy including compaction and sintering is introduced to solve the incomplete oxidation problems in manufacturing process of Ag-SnO2 electrical contact material. The formation of the blends was manufactured by wet blending of powders of Ag and SnO2. The quantity of SnO2 powder was 15wt.%, with intent to optimize the powdering process for the minute powder of which diameter is less than 5μ m. Particle size and grain distribution of Ag powder and SnO2 powder by powder metallurgy were measured by image analyzer. In order to estimate the properties of specimen tested with a variation of mixed time, the micro-hardness measurement was carried out. The Ag-SnO2-based contact material, which was produced through this study, was actually set in an electric switchgear of which working voltage is 462V and current is between 25 and 40A, for the purpose of testing its performance. As the result, it excelled the existing Ag-CdO-based contact materials in terminal-temperature ascent and main contact resistance.

scholarly journals Synthesis of SnO2 nanopowders by a sol-gel process using propanol-isopropanol mixture

2008 ◽  
Vol 6 (4) ◽  
pp. 651-656 ◽  
Author(s):  
Ali Hassanzadeh ◽  
Behrang Moazzez ◽  
Hossein Haghgooie ◽  
Mohsen Nasseri ◽  
Mir Golzan ◽  
...  
Keyword(s):  
Sol Gel ◽  
Nanometer Scale ◽  
Preparation Process ◽  
X Ray ◽  
Selected Area Electron Diffraction ◽  
Transmission Electron ◽  
Sol Gel Process ◽  
Ft Ir ◽  
Sno2 Powder ◽  
Sol Gel Synthesis

AbstractA simple sol-gel process is proposed for synthesizing SnO2 nanopowders utilizing normal propanol and isopropanol mixture instead of just using normal alcohols such as ethanol, propanol or butanol for Sol preparation. No surfactant was used in this Sol preparation process. The structure of sol is studied by FT-IR-ATR technique. On altering propanol to isopropanol ratio, three different nanopowders were obtained. X-ray powder diffraction, high-resolution transmission electron microscopy (HRTEM), selected area electron diffraction pattern (SAED) and BET techniques were used to characterize prepared powders. Results show that smaller grain size was obtained via altering alcohols ratio. In addition, Merck commercial SnO2 powder was also used as a reference material for comparing purposes; because it has nanometer scale (ca. 60 nm). HRTEM images show that obtained nanopowders were polycrystalline and their average diameters fall into the range of 6–80 nm. Finally, the effect of alkoxide ligand size through sol-gel synthesis on product particle size is discussed.

Photocatalytic Properties of Nanocrystalline Tin Oxide Synthesized by Using Molten Boric Acid as a Flux

2007 ◽  
Vol 336-338 ◽  
pp. 1986-1988 ◽  
Author(s):  
Lin Yan Li ◽  
Song Zhe Chen ◽  
Sheng Ming Xu ◽  
Gang Xu
Keyword(s):  
Photocatalytic Activity ◽  
Boric Acid ◽  
Tin Oxide ◽  
Boron Doping ◽  
High Photocatalytic Activity ◽  
Small Particle Size ◽  
Bet Analysis ◽  
Sno2 Powder ◽  
Uv Excitation ◽  
Better Than

Nanocrystalline tin oxide (S1) was prepared by using molten boric acid as a flux and was characterized by XRD, TEM, and BET analysis. Its photocatalytic activity under UV excitation was evaluated by the photodegradation of methylene blue in water and compared to that of the well-known P25 (TiO2) and SnO2 powder (S2) synthesized from hydrothermal system without the participation of H3BO3. It has been revealed that S1 exhibits similar photocatalytic activity to that of P25 powder and better than that of S2. The high photocatalytic activity of S1 is most likely to be originated from its small particle size and the boron-doping in the crystal lattice.

scholarly journals Optical and structural properties of Nd doped SnO2 powder fabricated by the sol–gel method

2014 ◽  
Vol 2 (39) ◽  
pp. 8235-8243 ◽  
Author(s):  
K. Bouras ◽  
J.-L. Rehspringer ◽  
G. Schmerber ◽  
H. Rinnert ◽  
S. Colis ◽  
...  
Keyword(s):  
Structural Properties ◽  
Sol Gel ◽  
Optically Active ◽  
Gel Method ◽  
Sol Gel Method ◽  
Nir Emission ◽  
Sno2 Powder ◽  
Uv Excitation

UV excitation of Nd doped SnO2 leads to visible & NIR emission: Nd3+ ions are optically active in SnO2 nanoparticles.

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