Impact of Precursor Granulometry on the Synthesis of Calcium-Aluminate Phases

Мұқаба

Дәйексөз келтіру

Толық мәтін

Ашық рұқсат Ашық рұқсат
Рұқсат жабық Рұқсат берілді
Рұқсат жабық Тек жазылушылар үшін

Аннотация

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.

Авторлар туралы

M. Trubitsyn

Belgorod State National Research University

Email: acjournal.nauka.nw@yandex.ru
308015, Belgorod, Russia

L. Furda

Belgorod State National Research University

Email: acjournal.nauka.nw@yandex.ru
308015, Belgorod, Russia

M. Yapryntsev

Belgorod State National Research University

Email: acjournal.nauka.nw@yandex.ru
308015, Belgorod, Russia

N. Volovicheva

Belgorod State National Research University

Email: acjournal.nauka.nw@yandex.ru
308015, Belgorod, Russia

M. Mikhaylyukova

Belgorod State National Research University

Хат алмасуға жауапты Автор.
Email: acjournal.nauka.nw@yandex.ru
308015, Belgorod, Russia

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