Abstract
By streaming potential measurements, the zero point of charge (zpc) of or‐Al2O3 having a fully hydroxylated surface was found to occur at pH 9.2 ± 0.2. By calcining the alumina at temperatures above 1000°C, the zpc was lowered to about pH 6.7. By aging the calcined material in water at room temperature for a period of weeks, the surface was rehydroxylated and the zpc increased. The zpc of MgO occurred at pH 12.5 f 0.5. Because of its high solubility, the zpc of MgO was not affected by heat treatment.
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Dates
Type | When |
---|---|
Created | 19 years, 2 months ago (June 6, 2006, 3:21 p.m.) |
Deposited | 1 year, 8 months ago (Nov. 23, 2023, 4:36 p.m.) |
Indexed | 1 month, 4 weeks ago (June 26, 2025, 9:10 a.m.) |
Issued | 60 years, 10 months ago (Oct. 1, 1964) |
Published | 60 years, 10 months ago (Oct. 1, 1964) |
Published Online | 19 years, 2 months ago (June 2, 2006) |
Published Print | 60 years, 10 months ago (Oct. 1, 1964) |
@article{ROBINSON_1964, title={Surface Charge of Alumina and Magnesia in Aqueous Media}, volume={47}, ISSN={1551-2916}, url={http://dx.doi.org/10.1111/j.1151-2916.1964.tb13801.x}, DOI={10.1111/j.1151-2916.1964.tb13801.x}, number={10}, journal={Journal of the American Ceramic Society}, publisher={Wiley}, author={ROBINSON, McDONALD and PASK, J. A. and FUERSTENAU, D. W.}, year={1964}, month=oct, pages={516–520} }