open access

https://hdl.handle.net/2115/57630

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

英語

Microstructure

2014-04-01

Elsevier

Chemical Engineering Journal

241

235-242

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.

学術雑誌論文

Accepted Manuscript

1385-8947