Synthesis and characterization of a binary system La2O3–SiO2 prepared by combustion method
| Autor: | Piotr Kirszensztejn, Waldemar Nowicki, P. Kuźma, Zbigniew Piskuła |
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| Rok vydání: | 2017 |
| Předmět: |
Thermogravimetric analysis
Materials science Silicon dioxide Oxide chemistry.chemical_element 02 engineering and technology 010402 general chemistry Combustion 01 natural sciences Biomaterials chemistry.chemical_compound Materials Chemistry Lanthanum Binary system Silicon oxide General Chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics Combinatorial chemistry 0104 chemical sciences Electronic Optical and Magnetic Materials chemistry Chemical engineering Ceramics and Composites 0210 nano-technology Powder diffraction |
| Zdroj: | Journal of Sol-Gel Science and Technology. 82:574-580 |
| ISSN: | 1573-4846 0928-0707 |
| Popis: | La2O3–SiO2 powders were prepared by the sol–gel and combustion method without addition of strong polar solvents to the initial system. Changes in the crystalline La2O3 structure and modification of surface binary oxides system were described as a function of concentration of the second component, that is silicon dioxide. A series of samples of La to Si molar ratios of 1:0.0, 1:0.1, 1:0.2, 1:0.3, and 1:0.4 were characterised by X-ray powder diffraction, Thermogravimetric analysis, fourier transform infrared spectrum and low temperature nitrogen adsorption measurements. According to the results, even a large quantity of silicon oxide component in the binary oxides system led to relatively small increase in defects in hexagonal lanthanum oxides obtained in a non-aqueous medium. La2O3–SiO2 binary oxide system was prepared by the sol–gel method without addition of strong polar solvents (e.g., water, alcohol). The present study is to propose a method for the synthesis of La2O3–SiO2 samples with the use of three components (tetraethoxysilane, acetic acid, lanthanum acetate). |
| Databáze: | OpenAIRE |
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