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The dehydration and dehydroxylation of alumina gels prepared from the hydrolysis of tri-sec-butoxyaluminium (ASB) at both 25 and 90 o C, unmodified and modified with short chain aliphatic acids has been studied using a combination of differential thermal analysis (DTA) and thermogravimetry. The alumina phase in the gel was found to be dependent upon the temperature of hydrolysis and the modifying...
Zirconia-silica composites were prepared and the compositions of these materials were determined using X-ray scattering. Differential thermal analysis (DTA) was employed to observe the phase transition from the amorphous state to the tetragonal state for each composite. With suitable calibration, DTA was shown to be a useful technique for the determination of particle compositions up to 5% wt./wt...
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