Aerogel Synthesis of Calcium Aluminates with Varied Stoichiometry ArticleGenre_short.SHORT_COMMUNICATION
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Journal of Sol-Gel Science and Technology
ISSN: 0928-0707 , E-ISSN: 1573-4846 |
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| Output data | Year: 2022, Volume: 104, Number: 2, Pages: 259–266 Pages count : 8 DOI: 10.1007/s10971-022-05933-7 | ||||
| Tags | Aerogel synthesis; Calcium aluminate; Differential thermal analysis; Porous structure; X-ray diffraction analysis; Spin probe EPR study | ||||
| Authors |
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| Affiliations |
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Funding (1)
| 1 | Ministry of Science and Higher Education of the Russian Federation | 0239-2021-0010 |
Abstract:
Calcium aluminates are attractive materials possessing unique physicochemical properties. In the present work, three aluminate systems of varied Ca/Al ratio (1/2, 6/7, and 3/2) were prepared via aerogel technique and characterized. The decomposition behavior of hydroxide aerogels was studied by differential thermal analysis. As found, the specific surface area (SSA) of the samples dried in an autoclave at 265 °C is increased from 265±10 to 515±30 m2/g when the Ca/Al ratio changes from 3/2 to 1/2. The calcination of these samples at 500 °C decreases the SSA values ~1.6-1.8 times whereas the tendency regarding the Ca/Al ratio remains the same. Reflections assigned to a mixture of various calcium aluminate phases appeared in the diffraction patterns of the samples only after the calcination at 900 °C. The application of the spin probe electron paramagnetic resonance technique allowed registering electron-donor, weak electron-acceptor, and radical sites on the surface of all the aerogel samples of calcium aluminates calcined at 500 °C and their concentrations depended on the Ca/Al ratio.
Cite:
Ilyina E.V.
, Bedilo A.F.
, Cherepanova S.V.
, Gerus Y.Y.
, Shuvarakova E.I.
, Vedyagin A.A.
Aerogel Synthesis of Calcium Aluminates with Varied Stoichiometry
Journal of Sol-Gel Science and Technology. 2022. V.104. N2. P.259–266. DOI: 10.1007/s10971-022-05933-7 WOS Scopus РИНЦ OpenAlex ANCAN
Aerogel Synthesis of Calcium Aluminates with Varied Stoichiometry
Journal of Sol-Gel Science and Technology. 2022. V.104. N2. P.259–266. DOI: 10.1007/s10971-022-05933-7 WOS Scopus РИНЦ OpenAlex ANCAN
Dates:
| Submitted: | Jun 1, 2022 |
| Accepted: | Sep 2, 2022 |
| Published online: | Sep 27, 2022 |
| Published print: | Nov 1, 2022 |
Identifiers:
| ≡ Web of science: | WOS:000862910100001 |
| ≡ Scopus: | 2-s2.0-85138761996 |
| ≡ Elibrary: | 50500576 |
| ≡ OpenAlex: | W4297338105 |
| ≡ Chemical Abstracts: | 2022:2529569 |
| ≡ Chemical Abstracts (print): | 180:292304 |