Effect of Si powder on the phase composition,microstructure and properties of MgAl2O4-SiC composite materials

Ceramics International, Год журнала: 2025, Номер unknown

Опубликована: Янв. 1, 2025

Язык: Английский

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Thermal decomposition and non‐isothermal kinetics of microcrystalline magnesite

International Journal of Applied Ceramic Technology, Год журнала: 2025, Номер unknown

Опубликована: Фев. 4, 2025

Abstract The thermal decomposition (TD) of magnesite is crucial for its high‐value applications, and understanding reaction mechanisms requires establishing accurate kinetic models. This research investigates the TD kinetics microcrystalline under varying heating rates (HRs) using thermogravimetry differential scanning calorimetry (TG–DSC) analysis. Kinetic parameters were derived Coats–Redfern (CR), Kissinger–Akahira–Sunose (KAS), Flynn–Wall–Ozawa (FWO) methods. influence HRs on process resulting MgO morphology was analyzed. results demonstrated that as increased, rate curves shifted to higher temperatures, necessitating elevated temperatures similar levels decomposition. mean activation energy () calculated be 162.45 kJ/mol, with a strong linear correlation between pre‐exponential factor, suggesting robust compensation. followed two‐dimensional phase boundary mechanism cylindrical symmetry. “Original shape pseudomorphs” found significantly affect microstructure, particle size variation, behavior products. These findings provide important insights industrial processing magnesite.

Язык: Английский

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Effects of CeO2 doping on the sintering properties and molten slag corrosion resistance of MgO-MgAl2O4 refractory materials

Construction and Building Materials, Год журнала: 2025, Номер 473, С. 141079 - 141079

Опубликована: Апрель 1, 2025

Язык: Английский

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Enhanced corrosion resistance of MgO–C refractories containing sintered MgAl2O4 spinel powder under various slag basicities

Corrosion Science, Год журнала: 2025, Номер 253, С. 113009 - 113009

Опубликована: Май 5, 2025

Язык: Английский

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Effect of alumina content on wetting behavior between aluminum ladle slag and iron substrate

Anti-Corrosion Methods and Materials, Год журнала: 2025, Номер unknown

Опубликована: Июнь 3, 2025

Purpose This study aims to solve the problem of aluminum suction tube failure caused by adhesion ladle slag (ALS) in process operation. Design/methodology/approach The wetting ALS with different Al2O3 content and iron substrate is studied sessile drop method. process, contact angle, element diffusion kinetic behavior at ALS/ interface are characterized. Findings melting divided into three stages: deformation, spreading. larger has higher start temperature point temperature, angle smaller so wettability better. exhibit reactive wetting. decreases rapidly response reaction. An increase enhances activity Al2O3, promotes reaction exacerbates corrosion behavior. Originality/value shows stronger on substrate.

Язык: Английский

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Novel ceramic materials based on industrial wastes within the CaO-MgO-Al2O3-SiO2 system

Materials Chemistry and Physics, Год журнала: 2024, Номер unknown, С. 130178 - 130178

Опубликована: Ноя. 1, 2024

Язык: Английский

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