The formation and microstructural properties of uniform α-GaOOH particles and their calcination products (CROSBI ID 209711)
Prilog u časopisu | izvorni znanstveni rad | međunarodna recenzija
Podaci o odgovornosti
Krehula, Stjepko ; Ristić, Mira ; Kubuki, Shiro ; Iida, Yusuke ; Fabián, Martin ; Musić, Svetozar
engleski
The formation and microstructural properties of uniform α-GaOOH particles and their calcination products
Uniform α-GaOOH submicron particles of different shapes (spindles, rhombic rods, rhombic prisms, hierarchical particles) were synthesized by simple low-temperature (at 60 °C) or hydrothermal (at 160 °C) precipitation from the mixture of aqueous solutions of gallium(III) chloride and organic alkali tetramethylammonium hydroxide (TMAH) at various pH values (5, 7 or 9). The growth mechanism of these particles was discussed. Crystallographic directions and crystal planes in α-GaOOH particles were identified. Differences in crystallite size, thermal and infrared properties of α-GaOOH particles were observed and discussed. Uniform α-Ga2O3 and β-Ga2O3 particles of the same or similar shapes, containing holes due to dehydroxylation, were obtained by calcination of the corresponding α-GaOOH particles at 500 or 900 °C, respectively. Differences in crystallite size and infrared properties of obtained gallium oxide samples, as well as differences in photoluminescence properties of β-Ga2O3 samples were observed and discussed.
α-GaOOH; α-Ga2O3; β-Ga2O3; FT-IR; FE-SEM; PL
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Podaci o izdanju
620
2015.
217-227
objavljeno
0925-8388
10.1016/j.jallcom.2014.09.134