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A. CHENITI1, O. PONTA1, L. TIRLE1, T. RADU1, S. SIMON1,*
The influence of isochronous heat treatments applied at different temperatures between 350 oC and 1100 oC under the same conditions and schedules, on 50La2O325TiO2 25SiO2 microparticles prepared by spray drying was investigated by scanning electron microscopy, X-ray diffraction and X-ray induced photoelectron spectroscopy. Differences in the elemental composition on outermost layer of the samples treated at different temperatures are observed. Major changes are obtained after the heat treatment carried out at 1100 oC. Treatment temperatures above 700 oC promote the nucleation and growth of La2O3, TiO2 , La2TiO5 and La9.33 Si6O26 nanocrystallites The highest lanthanum and silicon content occur on the surface of 1100 oC treated sample and is related to prevalent development of La9.33 Si6O26 nano crystalline phase.
Lanthanum Titania, Silica, Spray drying XPS.
A. CHENITI, O. PONTA, L. TIRLE, T. RADU, S. SIMON, Heat treatment effect on structure and atomic composition in the outermost surface layer of La2-O3-TiO2-SiO2 system, Optoelectronics and Advanced Materials - Rapid Communications, 6, 5-6, May-June 2012, pp.560-563 (2012).
Submitted at: Feb. 23, 2012
Accepted at: June 6, 2012
Optoelectronics and Advanced Materials - Rapid Communications
(2022): 0.5 - 2022 Journal Citation Reports (Clarivate Analytics, 2023)
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