The Synthesis of Stable, High Solid Content Alumina Sol |
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| Authors: | Jing Chengbin Zhao Xiujian Tao Haizheng |
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| Institution: | (1) Department of Materials and Environmental Science, Qingdao University of Technology & Science, China;(2) Key Laboratory for Silicate Materials Science and Engineering of the Ministry of Education, Wuhan University of Technology, China |
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| Abstract: | The stable alumina sol with an ASB/water molar ratio of 1:30 could not be obtained via the general peptization process because
gelation occurred immediately. With the addition of EAcAc the stability of this sol was greatly improved. The studies using
TEM, UV-V is and IR spectra revealed that a surface modification layer was formed around the Al2O3 colloidal particle through the chelating reaction of EAcAc with the surface HO-Al groups. The Al2O3 colloidal particles were therefore sufficiently capped and the growth of the colloidal particles was effectively prevented. |
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| Keywords: | alumina sol surface modification ethylacetoacetate aluminum sec-butoxide chelating reaction |
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