The Carbothermal Reduction of Silica with Y₂O₃-MgO Powders

• Authors: N. Canikoğlu
• Languages of publication: EN

Abstracts

EN

The aim of this study is to examine the effect of MgO and Y₂O₃ to the carbothermal reduction and nitridation of silica. The synthetic silica, MgO and Y₂O₃ powders were premixed (4wt% MgO-6% Y₂O₃, 5% MgO-5% Y₂O₃ and 6% MgO-4% Y₂O₃) in the starting reactants depending on the final powder composition. Carbon black was added to the silica (SiO₂) above the stoichiometric amount of oxygen (C/SiO₂ ratio of 3). The carbothermal reduction and nitridation process was carried out in a tube furnace at 1400°C, 1450°C, and 1475°C for 3 h under nitrogen gas atmosphere. The synthesized Si₃N₄ powder properties were examined by using X-ray diffraction, scanning electron microscopy-energy dispersive X-ray spectrosopy. In this study, MgO and Y₂O₃ powders dispersed in the final Si₃N₄ powder more homogeneously and thus formable and sinterable the starting mixing material is produced.

Keywords

EN

81.05.Je

Discipline

• 81.05.Je: Ceramics and refractories (including borides, carbides, hydrides, nitrides, oxides, and silicides)(for ceramics in electrochemistry, see 82.45.Yz)

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2017
• Volume: 131
• Issue: 1
• Pages: 162-164

Dates

published

2017-01

Contributors

author

N. Canikoğlu

• Sakarya University, Engineering Faculty, Department of Metallurgy and Materials Engineering, 54187, Sakarya, Turkey

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Identifiers

DOI

10.12693/APhysPolA.131.162