Preparation of Zirconia Fiber Body with Extrusion-Extraction Molding

S.A. He; Xiao Yan Zhu

doi:10.4028/www.scientific.net/KEM.519.291

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HomeKey Engineering MaterialsKey Engineering Materials Vol. 519Preparation of Zirconia Fiber Body with...

Preparation of Zirconia Fiber Body with Extrusion-Extraction Molding

Abstract:

Zirconia fiber body was prepared with Extrude-extracting, using zirconium slurry made of partial stabilized Zirconia ultra-fine powder. The result shows that，acetone is the first choice as extraction agent because of its notable effect of water extraction on zirconium slurry. The Zirconia fiber body, which length is over 2 centimeters and solid content is more than 98% ( weight percent ), can be prepared while the range of solid fraction in slurry is in 36 vol％～49vol％, with addition less than 1% ammonium polyacrylic acid, the extrusion force is range in 1641.5 Pa～6566.2 Pa. The solidfication mechanism transformation from slurry streamlet to fiber body is particle caking, result in water being extracted by aceton and static repulsion force falling as powder surface electronmotive force being reduced, when zirconium slurry extruded into solvent with low dielectric constant. Difference of velocity distribution of slurry passing through spinneret orifice and very small surface tension between slurry and extraction agent cause coarseness occurred on the fiber body surface.

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Periodical:

Key Engineering Materials (Volume 519)

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291-296

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.519.291

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Online since:

July 2012

Authors:

S.A. He, Xiao Yan Zhu

Keywords:

Coarseness, Extrusion-Extraction Molding, Fiber Body, Zirconia

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