Binder removal from injection moulded zirconia ceramics

Dean-Mo Liu, Wenjea J. Tseng

研究成果: Article同行評審

19 引文 斯高帕斯(Scopus)

摘要

Binder removal from a wax-based zirconia ceramic moulding has been investigated in terms of solid content of the mouldings (45-55 vol%), heating rate (0.5-5°C min-1), sample form (powder and block), and sample thickness (0.5-5 mm). Experimental results show that the samples with lower surface-to-volume ratio or more solid content has greater restriction to binder transport which reduces binder removal kinetics to a significant extent. Such a transport restriction can be minimised or eliminated by using the sample in a powdered configuration. The behaviour of binder pyrolysis is considerably modified by the presence of inorganic particles, which may be considered as a result of catalytic reaction. Activation energy of pyrolysis of the binder is evaluated directly based on the existing kinetics models through the use of the resulting weight loss-temperature curve. The activation energy for evaporation obtained is smaller than that for thermal degradation suggesting that for the binder with low molecular weight currently employed, evaporation may be considered as a dominant mechanism for binder removal. This finding is also in well agreement with literature results.

原文English
頁(從 - 到)529-534
頁數6
期刊Ceramics International
25
發行號6
DOIs
出版狀態Published - 1 一月 1999

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