Email this article Impact of Precursor Granulometry on the Synthesis of Calcium-Aluminate Phases
- Authors: Trubitsyn M.A.1, Furda L.V.1, Yapryntsev M.N.1, Volovicheva N.A.1, Mikhaylyukova M.O.1
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Affiliations:
- Belgorod State National Research University
- Issue: Vol 96, No 3 (2023)
- Pages: 269-281
- Section: Articles
- URL: https://journal-vniispk.ru/0044-4618/article/view/247288
- DOI: https://doi.org/10.31857/S0044461823030052
- EDN: https://elibrary.ru/PHYCAM
- ID: 247288
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Abstract
Calcium aluminate phases were synthesized in the range 950–1450°C from available raw materials: carbonate rock and metallurgical alumina, predominantly in the γ form with different grain sizes. The calculations of the amount of raw materials were based on the requirement to ensure the chemical composition of the product: Al2O3 71–72 and CaO 27–28 wt %. The designed phase composition of the samples is 65 wt % CaAl2O4 and 35 wt % CaAl4O7. When alumina with a grain size of 90 μm and a spherulitic microstructure is introduced into the reaction, the formation of the CaAl2O4 and CaAl4O7 phases mainly occurs in the range of 1250–1350°C, and phase equilibrium is established at 1450°C. Reducing the size of γ-alumina grains to 10 μm and destroying their spherulitic microstructure shifts the formation of calcium aluminates to the temperature range below 1250°C, and also significantly increases the rate of synthesis of target products.
About the authors
M. A. Trubitsyn
Belgorod State National Research University
Email: acjournal.nauka.nw@yandex.ru
308015, Belgorod, Russia
L. V. Furda
Belgorod State National Research University
Email: acjournal.nauka.nw@yandex.ru
308015, Belgorod, Russia
M. N. Yapryntsev
Belgorod State National Research University
Email: acjournal.nauka.nw@yandex.ru
308015, Belgorod, Russia
N. A. Volovicheva
Belgorod State National Research University
Email: acjournal.nauka.nw@yandex.ru
308015, Belgorod, Russia
M. O. Mikhaylyukova
Belgorod State National Research University
Author for correspondence.
Email: acjournal.nauka.nw@yandex.ru
308015, Belgorod, Russia
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