نتایج جستجو برای: spray pyrolysis technique

تعداد نتایج: 639714  

2014
H. K. Grossmann A. Gröhn F. Meierhofer Mike Kuan-Yu Shen Miklos Lengyel Richard Axelbaum

Flame Spray Pyrolysis (FSP) is a well investigated high temperature aerosol technique for synthesizing nano-sized metal oxide catalysts of almost all metals and transition metals by gas-to-particle conversion (Teoh et al. 2010). However, specific designs of multi-component catalysts and the controlled dispersion of catalytic material on the support are limited with this approach. Double Flame S...

2017
Ran Ji Ding Zheng Chang Zhou Jiang Cheng Junsheng Yu Lu Li

Tungsten oxide (WO₃) is prepared by a low-temperature ultrasonic spray pyrolysis method in air atmosphere, and it is used as an anode buffer layer (ABL) for organic solar cells (OSCs). The properties of the WO₃ transition metal oxide material as well as the mechanism of ultrasonic spray pyrolysis processes are investigated. The results show that the ultrasonic spray pyrolysized WO₃ ABL exhibits...

2013
Lado Filipovic Siegfried Selberherr Giorgio C. Mutinati Elise Brunet Stephan Steinhauer Anton Köck Jordi Teva Jochen Kraft Jörg Siegert Franz Schrank

The deposition of a thin tin oxide film allows for the manufacture of modern gas sensors. Spray pyrolysis deposition is used to grow the required thin films, as it can be seamlessly integrated into a standard CMOS processing sequence. A model for spray pyrolysis deposition is developed and implemented within the Level Set framework. Two models for the topography modification due to spray pyroly...

2009
S. Turner S. M. F. Tavernier G. Huyberechts E. Biermans S. Bals K. J. Batenburg G. Van Tendeloo

Nano-sized ZnO particles with a narrow size distribution and high crystallinity were prepared from aqueous solutions with high concentrations of Zn containing salts and citric acid in a conventional spray pyrolysis setup. Structure, morphology and size of the produced material were compared to ZnO material produced by simple spray pyrolysis of zinc nitrates in the same experimental setup. Using...

Journal: :iranian journal of chemistry and chemical engineering (ijcce) 2011
hamid reza ghaffarian, mahboobeh saiedi mohammad ali sayyadnejad ali morad rashidi

zinc oxide (zno) nanoparticles were synthesized by spray pyrolysis method using an aqueous solution of zinc acetate at various concentrations from 5 to 25 wt%. the decomposition of precursor solutions was carried out at 800, 1000 and 1200ºc under different atomizing pressures. the crystal structure and morphology of synthesized nanoparticles were characterized by x-ray diffraction (xrd) spectro...

Journal: :Physical chemistry chemical physics : PCCP 2015
Hyeon Seok Ju Jung Sang Cho Jong Hwa Kim Yun Ju Choi Yun Chan Kang

A new concept for preparing hollow metal oxide nanopowders by salt-assisted spray pyrolysis applying nanoscale Kirkendall diffusion is introduced. The composite powders of metal oxide and indecomposable metal salt are prepared by spray pyrolysis. Post-treatment under a reducing atmosphere and subsequent washing using distilled water produce aggregation-free metal nanopowders. The metal nanopowd...

Journal: :journal of nanostructures 2012
m. barzegar m. b. rahmani h. haratizadeh

thin films of sno2 nanowires were successfully prepared by using chemical vapor deposition (cvd) process on quartz substrates. afterwards, a thin  layer of palladium (pd) as a catalyst was coated on top of nanowires. for the deposition of pd, a simple and low cost technique of spray pyrolysis was employed, which caused an intensive enhancement on the sensing response of fabricated sensors. prep...

Journal: :chemistry of solid materials 2015
t. akbari s.m. rozati

in  this paper  thin  films of  tin sulfide (sns) were deposited on  the glass substrates using spray pyrolysis method with the substrate temperatures in the range of 400–600℃, keeping the other deposition parameters constant. in  this work  the characteristic of sns  thin  films  investigated. the xrd pattern and optical transmittance of thin films also are discussed. with the change in concen...

ایرانمنش, پروانه, تجبر, ناصر , علی‌نژاد, محمدرضا ,

Strontium titanate polycrystalline thin films were prepared by sequent deposition of three TiO2/SrO/TiO2 layers using spray pyrolysis technique. Deposition parameters such as:  precursor solution, deposition temperature, flow rate of solution and annealing conditions were optimized to obtain homogeneous transparent films. Prepared thin films have granular microstructure. The optical transmittan...

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