Oxidation Studies of SiAlON/MgAlON Ceramics with Fe2O3 and CaO Impurities, Part I: Kinetics

Zhang, Mei; Teng, Lidong; Seetharaman, Seshadri

doi:10.1007/s11663-012-9763-y

Cited by 4 publications

(1 citation statement)

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“…Previous works have presented the preparation of β-SiAlON type ceramics starting from recycled materials or industrial wastes [8][9][10][11][12][13][14][15]. However, the synthesis of β-SiAlON type compounds using aluminum dross is a challenge because dross produced in secondary aluminum smelting units such as reverberatory furnaces, the final chemical composition could be quite heterogeneous [16,17].…”

Section: Introductionmentioning

confidence: 99%

EFFECT OF MgAl₂O₄ ON THE GROWTH OF β -Si₃Al₃O₃N₅ PREPARED BY CARBOTHERMAL REDUCTION BY NITRIDING

Valdés¹

2020

Ceramics - Silikaty

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The β-Si 3 Al 3 O 3 N 5 compound was experimentally prepared by carbothermal reduction by nitriding using pure SiO 2 , Al 2 O 3 , C, and N2. The effect of MgAl 2 O 4 on the growth of β-Si 3 Al 3 O 3 N 5 was investigated as a function of temperature and molar concentration of MgAl 2 O 4 . In this way, it was found that the formation of β-Si 3 Al 3 O 3 N 5 when MgAl 2 O 4 is present in concentrations lower than 13 wt. % occurs. However, when the MgAl 2 O 4 concentration was as high as 25.6 wt. %, the formation of β-Si 3 Al 3 O 3 N 5 compound was not attained and the formation of quaternary magnesium-rich SiAlON phases such as Mg-Si 4 Al 2 O 6 N 4 was found. Moreover, the mechanistic steps during the consolidation of SiAlON type structures are presented and discussed.

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