Structure and properties of plasma sprayed BaTiO(3) coatings: Spray parameters versus structure and photocatalytic activity

0368570 - ÚFP 2012 RIV GB eng J - Článek v odborném periodiku
Ctibor, Pavel - Ageorges, H. - Štengl, Václav - Murafa, Nataliya - Píš, I. - Zahoranová, T. - Nehasil, V. - Pala, Zdeněk
Structure and properties of plasma sprayed BaTiO(3) coatings: Spray parameters versus structure and photocatalytic activity.
Ceramics International. Roč. 37, č. 7 (2011), s. 2561-2567. ISSN 0272-8842. E-ISSN 1873-3956
Grant CEP: GA AV ČR IAAX00430803
Výzkumný záměr: CEZ:AV0Z20430508; CEZ:AV0Z40320502
Klíčová slova: Spectroscopy * Optical properties * BaTiO3 * Plasma spraying * Photocatalysis
Kód oboru RIV: JH - Keramika, žáruvzdorné materiály a skla
Impakt faktor: 1.751, rok: 2011
http://www.sciencedirect.com/science/article/pii/S0272884211002173

Plasma spraying enables the creation of layers with thickness in a millimeter range adhering on various substrates. This paper provides a study of phase composition, optical properties and photocatalytic activity of BaTiO3 coatings prepared by atmospheric plasma spraying. The spraying was carried out by a direct current gas-stabilized plasma gun. BaTiO3 was fed into the plasma jet as a feedstock powder prepared by a reactive sintering of micrometer-sized powders of BaCO3 and TiO2. Microstructure and phase composition are reported and discussed in connection with optical properties and photocatalytic activity. The spraying was carried out by a direct current gas-stabilized plasma gun which normally utilizes spray distance (SD) in frames from 100 to 150 mm. Besides conventional SD 100 mm also extremely high SD 190 mm was used. The color of the sprayed coating is different for each SD and also differs from sintered BaTiO3. HR-TEM images for crystalline and amorphous zones are given.
Trvalý link: http://hdl.handle.net/11104/0202874