Rheological characterisation of water-based AlN slurries for the tape casting process

authors	Olhero, SM; Ferreira, JMF
nationality	International
journal	JOURNAL OF MATERIALS PROCESSING TECHNOLOGY
author keywords	rheology; AlN; aqueous processing; tape casting
keywords	ALUMINA; SUSPENSIONS; BINDERS; HYDROLYSIS; NITRIDE; POWDER
abstract	In the present work rheological properties of aqueous concentrated AIN suspensions have been investigated in the presence of a sintering aid, deffloculant, binder and plasticizers, in order to screen the most suitable experimental conditions to obtain a good rheological behaviour for tape casting thick and non-cracked tapes with good flexibility. Suspensions exhibiting the desired shear thinning behaviour could be prepared. Adding binder and plasticizers did not change the shear thinning behaviour, but the viscosity revealed an increasing trend with increasing added amounts of binder. The flexibility was improved for the tapes derived from the more viscous suspensions containing higher amounts of binder. Crack free tapes having a maximum thickness of 1.5 mm, and with binder and plasticizer contents in the ranges of 10-15 wt.% and 5-10 wt.%, respectively, could be obtained. (c) 2005 Elsevier B.V. All rights reserved.
publisher	ELSEVIER SCIENCE SA
issn	0924-0136
year published	2005
volume	169
issue	2
beginning page	206
ending page	213
digital object identifier (doi)	10.1016/j.jmatprotec.2005.03.007
web of science category	Engineering, Industrial; Engineering, Manufacturing; Materials Science, Multidisciplinary
subject category	Engineering; Materials Science
unique article identifier	WOS:000233249100012