Water in oil emulsions were prepared by A1(NO3)3 solutions having various concentrations between 0.25 - 2.00 M. The emulsion droplets were investigated by optical microscopy. Infinitely stable emulsions were evaporated by dropping them into hot mineral oil. The precipitated dark brown precursors were calcined at 1000°C and fine alumina powders were obtained. Adsorption and desorption of nitrogen on the powders was realized at 77K. The specific surface areas (A) and the specific micropore-mesopore volumes (V) were determined respectively from the data of adsorption and desorption. The variation of the A and V values as a function of the concentration of A1(NO3)3 solutions was determined. The powder which had the maximum A and V values, was characterised by taking its photograph by an electron microscope and also by determining its particle size distribution and mesopore size distribution.
Birincil Dil | İngilizce |
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Konular | Kimya Mühendisliği |
Bölüm | Research Article |
Yazarlar | |
Yayımlanma Tarihi | 1 Ocak 2001 |
Yayımlandığı Sayı | Yıl 2001 Cilt: 47 |
Communications Faculty of Sciences University of Ankara Series B Chemistry and Chemical Engineering
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