Properties of spry drying iron powders and behavior of thermal debinding
Date Issued
2006
Date
2006
Author(s)
Sung, Hui-Lin
DOI
zh-TW
Abstract
Spray drying is a widely used process for producing granulated powders. It provides spray dried powders with good flowability, good compactability, and high green density. This research examined the effects of different processing parameters, solid content, slurry viscosity, and binder type on spray drying and the characteristics of the resulted granulated powders.
The results showed that the flow rates of the powders were 88 sec/50 g(8 sec/cm3) and 27 sec/50 g(4 sec/cm3) for Fe-30%Ni / graphite and carbonyl iron powders, respectively.
This study also examined the effects of thermal debinding temperature on the carbon contents and the microstructure of the carbonyl iron powder. The results showed that the onion structure disappeared when the thermal debinding temperature was higher than 600OC. The Fe3C compound was formed at 600OC and 700OC, it then disappear after 900OC.
Subjects
噴霧造粒
黏結劑
羰基鐵粉
碳含量
熱脫脂
spray drying
binder
carbonyl iron powder
carbon content
thermal debinding
Type
thesis
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