Effects of In-situ and Ex-situ Heat-Treatment Procedures on the Transport Properties of the MgB2 Superconducting Thin Films Fabricated by Ultrasonic Spray Pyrolysis (USP) System

2010 ◽  
Vol 24 (1-2) ◽  
pp. 241-245 ◽  
Author(s):  
M. E. Yakinci ◽  
Y. Aydogdu ◽  
M. A. Aksan ◽  
Y. Balci ◽  
S. Altin
Keyword(s):  
Thin Films ◽  
Heat Treatment ◽  
Spray Pyrolysis ◽  
Ultrasonic Spray Pyrolysis ◽  
Ex Situ ◽  
Superconducting Thin Films ◽  
Ultrasonic Spray ◽  
Mgb2 Superconducting Thin Films ◽  
Treatment Procedures

scholarly journals Structural and Electrochemical Properties of Nesting and Core/Shell Pt/TiO2 Spherical Particles Synthesized by Ultrasonic Spray Pyrolysis

Metals ◽  
2019 ◽  
Vol 10 (1) ◽  
pp. 11 ◽  
Author(s):  
Milica G. Košević ◽  
Milana M. Zarić ◽  
Srećko R. Stopić ◽  
Jasmina S. Stevanović ◽  
Thomas E. Weirich ◽  
...  
Keyword(s):  
Spray Pyrolysis ◽  
Oxygen Reduction ◽  
Hollow Spheres ◽  
Ultrasonic Spray Pyrolysis ◽  
Ex Situ ◽  
Spherical Particles ◽  
Core Shell ◽  
Ultrasonic Spray ◽  
Solid Spheres

Pt/TiO2 composites were synthesized by single-step ultrasonic spray pyrolysis (USP) at different temperatures. In an in-situ method, Pt and TiO2 particles were generated from tetra-n-butyl orthotitanate and chloroplatinic acid, and hydrothermally-prepared TiO2 colloidal dispersion served as Pt support in an ex-situ USP approach. USP-synthesized Pt/TiO2 composites were generated in the form of a solid mixture, morphologically organized in nesting huge hollow and small solid spheres, or TiO2 core/Pt shell regular spheroids by in-situ or ex-situ method, respectively. This paper exclusively reports on characteristic mechanisms of the formation of novel two-component solid composites, which are intrinsic from the USP approach and controlled precursor composition. The generation of the two morphological components within the in-situ approach, the hollow spheres and all-solid spheres, was indicated to be caused by characteristic sol-gel/solid phase transition of TiO2. Both the walls of the hollow spheres and the cores of all-solid ones consist of TiO2 matrix populated by 10 nm-sized Pt. On the other hand, spherical, uniformly-sized, Pt particles of a few nanometers in size created a shell uniformly deposited onto TiO2 spheres of ca. 150 nm size. Activities of the prepared samples in an oxygen reduction reaction and combined oxygen reduction and hydrogen evolution reactions were electrochemically tested. The ex-situ synthesized Pt/TiO2 was more active for oxygen reduction and combined oxygen reduction and hydrogen reactions in comparison to the in-situ Pt/TiO2 samples, due to better availability of Pt within a core/shell structure for the reactions.

scholarly journals Strong texture tuning along different crystalline directions in glass-supported CeO2 thin films by ultrasonic spray pyrolysis

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Inti Zumeta-Dubé ◽  
José Manuel García Rangel ◽  
Jorge Roque ◽  
Issis Claudette Romero-Ibarra ◽  
Mario Fidel García Sánchez
Keyword(s):  
Thin Films ◽  
Spray Pyrolysis ◽  
Spray Pyrolysis Technique ◽  
Morphological Characteristics ◽  
Ultrasonic Spray Pyrolysis ◽  
Cost Effective ◽  
Growth Direction ◽  
Large Area ◽  
Smart Windows ◽  
Ultrasonic Spray

AbstractThe strong facet-dependent performance of glass-supported CeO2 thin films in different applications (catalysis, smart windows, etc.) has been the target of diverse fundamental and technological approaches. However, the design of accurate, cost-effective and scalable methods with the potential for large-area coverage that produce highly textured glass-supported CeO2 thin films remains a technological challenge. In the present work, it is demonstrated that under proper tuning conditions, the ultrasonic spray pyrolysis technique enables one to obtain glass-supported polycrystalline CeO2 films with noticeable texture along both the (100) and (111) directions, as well as with randomly oriented crystallites (no texture). The influence of flow rates, solution molarity, and substrate temperature on the texture and morphological characteristics, as well as optical absorption and Raman response of the deposited films, is evaluated. The obtained results are discussed on the basis of the combined dependence of the CeO2-exposed surfaces on the thermodynamic stability of the corresponding facets and the reaction kinetics, which modulate the crystallite growth direction.

Preparation of high quality MgO thin films by ultrasonic spray pyrolysis

2004 ◽  
Vol 228 (1-4) ◽  
pp. 297-301 ◽  
Author(s):  
Ji Ming Bian ◽  
Xiao Min Li ◽  
Tong Lai Chen ◽  
Xiang Dong Gao ◽  
Wei Dong Yu
Keyword(s):  
Thin Films ◽  
Spray Pyrolysis ◽  
Ultrasonic Spray Pyrolysis ◽  
High Quality ◽  
Ultrasonic Spray

Anatase thin films by ultrasonic spray pyrolysis

2010 ◽  
Vol 88 (1) ◽  
pp. 98-101 ◽  
Author(s):  
A. Nakaruk ◽  
D. Ragazzon ◽  
C.C. Sorrell
Keyword(s):  
Thin Films ◽  
Spray Pyrolysis ◽  
Ultrasonic Spray Pyrolysis ◽  
Ultrasonic Spray

Preparation of ferromagnetic N–Mn codoped ZnO thin films by ultrasonic spray pyrolysis

2016 ◽  
Vol 28 (1) ◽  
pp. 426-434
Author(s):  
Canyun Zhang ◽  
Jinfang Kong ◽  
Fengchao Wang ◽  
Jun Zou ◽  
Yaoqing Huang
Keyword(s):  
Thin Films ◽  
Spray Pyrolysis ◽  
Ultrasonic Spray Pyrolysis ◽  
Zno Thin Films ◽  
Ultrasonic Spray
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