Nanoparticle Colloidal Suspension Optimization and Freeze-Cast Forming | Zendy

Kathy Lu | Zendy; Chris S. Kessler | Zendy

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Nanoparticle Colloidal Suspension Optimization and Freeze-Cast Forming

Author(s) -

Kathy Lu,

Chris S. Kessler

Publication year - 2008

Publication title -

ceramic engineering and science proceedings

Language(s) - English

Resource type - Book series

SCImago Journal Rank - 0.128

H-Index - 33

eISSN - 1940-6339

pISSN - 0196-6219

DOI - 10.1002/9780470291375.ch1

Subject(s) - suspension (topology) , dispersant , rheology , materials science , nanoparticle , colloid , casting , microstructure , composite material , chemical engineering , dispersion (optics) , nanotechnology , physics , mathematics , engineering , homotopy , pure mathematics , optics

Nanopanicle suspension and forming are important areas. In this paper, the stability and rheology ofAl 2 O 3 nanopanicle suspensions at different dispersant concentration, suspension pH, and solids loading were studied. The most desirable suspension conditions were 7.5-9.5 for pH and 2.00-2.25 wt% of Al 2 O 3 for poly(acrylic acid) (PAA) dispersant. 45.0 vol% Al 2 O 3 solids loading can be achieved while maintaining good suspension flow for freeze casting. The maximum solids loading of the Al 2 O 3 nanoparticle suspension was predicted to he 50.7 volt%. The preliminary results of the freeze-cast sample showed that suspension pre-rest before freezing was critical for achieving defect free microstructures.

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