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Aqueous silicon nitride suspensions: Effect of surface treatment on the rheological and electrokinetic properties
YKI – Ytkemiska institutet.
YKI – Ytkemiska institutet.
1997 (English)In: Key Engineering Materials, ISSN 1013-9826, E-ISSN 1662-9795, Vol. 132-136, 285-288 p.Article in journal (Refereed)
Abstract [en]

The effect of surface treatment on the colloidal stability and rheological properties of concentrated aqueous silicon nitride suspensions has been studied. Oxidized, leached and as-received, non-treated powders were studied using electroacoustic and rheological methods. At pH=10, the silicon nitride powder is well dispersed irrespective of surface treatment. However, the viscosity was affected by the surface treatment; oxidation caused a slightly higher and leaching a significantly lower viscosity. Several possible causes of the leaching effect on viscosity was discussed, e.g. leaching causing a smooth particle surface or facilitating break-up of strong, liquid immobilizing agglomerates. Additionally, the effect of added dispersants – anionic small molecules and polyelectrolytes – were also briefly mentioned.

Place, publisher, year, edition, pages
1997. Vol. 132-136, 285-288 p.
Keyword [en]
Silicon nitride, slurry processing, aqueous dispersion, rheology, electroacoustics, dispersing agent
National Category
Natural Sciences
Identifiers
URN: urn:nbn:se:ri:diva-27077OAI: oai:DiVA.org:ri-27077DiVA: diva2:1054081
Note
A1149Available from: 2016-12-08 Created: 2016-12-08Bibliographically approved

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