Mechano-chemical changes of nano sized α-Al2O3 during wet dispersion in stirred ball mills
Peukert W, Stenger F, Götzinger M, Jakob P (2004)
Publication Language: English
Publication Status: Published
Publication Type: Journal article, Original article
Publication year: 2004
Journal
Book Volume: 21
Pages Range: 31-38
Journal Issue: 1
Abstract
The mechano-chemical changes in synthetic α-AlO during wet dispersion in a stirred ball mill, are studied. It is shown that a second phase is generated which can be identified as an aluminum hydroxide (Bayerite) by use of dynamic scanning calorimetry (DSC), X-ray diffraction (XRD), thermogravimetry (TG), Fourier transformed infrared (FTIR) spectroscopy and transmission electron microscopy (TEM). The amount of the Bayerite phase produced increases with milling time. A comparison of the evaluated amounts from TG- and DSC-measurements are in reasonable agreement. Furthermore, the measured BET surface area shows a strong dependence on the temperature of sample preparation. Depending on the temperature, the bayerite phase is seen to convert to the α-phase again and also forms meso- and possibly micro-pores, leading to a high BET surface area. In this paper, we highlight the necessity for using different methods to characterize the dispersion process, and for a correct interpretation of the measurement results.
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Germany (DE)How to cite
APA:
Peukert, W., Stenger, F., Götzinger, M., & Jakob, P. (2004). Mechano-chemical changes of nano sized α-Al2O3 during wet dispersion in stirred ball mills. Particle & Particle Systems Characterization, 21(1), 31-38. https://doi.org/10.1002/ppsc.200400902
MLA:
Peukert, Wolfgang, et al. "Mechano-chemical changes of nano sized α-Al2O3 during wet dispersion in stirred ball mills." Particle & Particle Systems Characterization 21.1 (2004): 31-38.
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