Naslov
Microstructural properties of boehmite formed under hydrothermal conditions

Autori
Musić, Svetozar ; Dragčević, Đurđica ; Popović, Stanko ; Vdović, Neda

Izvornik
Materials science & engineering. B, Solid-state materials for advanced technology (0921-5107) 52 (1998), 2-3; 145-153

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
Hydrothermal synthesis; Bayerite; Boehmite; X-ray diffraction; Fourier transform infrared spectroscopy; Transmission electron microscopy; Microelectrophoresis
(Hydrothermal synthesis; Bayerite; Boehmite; X-ray diffraction; Fourier transform infrared spectroscopy; transmission electron microscopy; Microelectrophoresis)

Sažetak
The microstructural properties of boehmite formed in an alkaline medium under hydrothermal conditions were investigated using X-ray diffraction (XRD). Fourier transform IR (FT-IR) spectroscopy, transmission electron microscopy (TEM) and microelectrophoresis. The bayerite formed at the beginning of the precipitation process converted to boehmite by the dissolution/reprecipitation mechanism. Boehmite crystallites were in the nanosize range and of anisotropic shape, as determined by XRD. A tendency toward an increase in the crystallite size with prolonged duration of autoclaving was evident both at 160 and 120 oC. The boehmite particles produced by autoclaving at 160 oC for 10 h looked like thin microfoils, i.e. different from the boehmite morphology usually obtained (rods, fibrils, and very small plates). The factors that influence the pHiep of boehmite particles are discussed. The FT-IR spectra of bayerite and boehmite are interpreted.

Izvorni jezik
Engleski

Znanstvena područja
Kemija

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