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Reaction characteristics of combustion synthesis of β-SiAlON using different additives

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Title: Reaction characteristics of combustion synthesis of β-SiAlON using different additives
Authors: Niu, Jing Browse this author
Nakamura, Tomokazu Browse this author
Nakatsugawa, Isao Browse this author
Akiyama, Tomohiro Browse this author →KAKEN DB
Keywords: Combustion synthesis
Reaction characteristics
Temperature profile
Issue Date: 1-Apr-2014
Publisher: Elsevier
Journal Title: Chemical Engineering Journal
Volume: 241
Start Page: 235
End Page: 242
Publisher DOI: 10.1016/j.cej.2013.12.030
Abstract: Reaction characteristics of combustion synthesis (CS) of β-SiAlON powders in a horizontal CS chamber were compared by including two types of additives (β-SiAlON and NaCl) in Si, SiO2, and Al powder raw materials. The results showed that the reaction characteristics were influenced by the additives, which exerted a strong effect on the reaction rate and the morphology of the products. At the respective maximum combustion temperatures, a relatively slow conversion rate, with a reacted fraction (eta) of 58.7%, was achieved with the addition of 12 mass% NaCl to the raw materials, whereas the addition of 45 mass% β-SiAlON powders afforded eta = 88%. The NaCl additive yielded rod-like crystals, which were well developed by a long after-burn time. However, self-sintering occurred in the presence of β-SiAlON powders. The results indicate that some degree of control over the conversion rate of the reaction and the microstructures of the product can be achieved by varying the type of additives.
Type: article (author version)
Appears in Collections:工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 秋山 友宏

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