Hostname: page-component-586b7cd67f-r5fsc Total loading time: 0 Render date: 2024-11-24T13:38:24.328Z Has data issue: false hasContentIssue false
  • English
  • Français

Colloidal processing, surface characterization, and sintering of nano ZrO2 powders

Published online by Cambridge University Press:  03 March 2011

Cihangir Duran ,
Yu Jia ,
Yuji Hotta ,
Kimiyasu Sato  and
Koji Watari
Cihangir Duran
Affiliation:
National Institute of Advanced Industrial Science and Technology, Advanced Sintering Technology Group, Advanced Manufacturing Research Institute, Anagahora 2266-98, Shimoshidami, Moriyama-ku, Nagoya, 463-8560, Japan; and Gebze Institute of Technology, Department of Materials Science and Engineering, 41400, Gebze, Kocaeli, Turkey
Yu Jia
Affiliation:
National Institute of Advanced Industrial Science and Technology, Advanced Sintering Technology Group, Advanced Manufacturing Research Institute, Anagahora 2266-98, Shimoshidami, Moriyama-ku, Nagoya, 463-8560, Japan
Yuji Hotta*
Affiliation:
National Institute of Advanced Industrial Science and Technology, Advanced Sintering Technology Group, Advanced Manufacturing Research Institute, Anagahora 2266-98, Shimoshidami, Moriyama-ku, Nagoya, 463-8560, Japan
Kimiyasu Sato
Affiliation:
National Institute of Advanced Industrial Science and Technology, Advanced Sintering Technology Group, Advanced Manufacturing Research Institute, Anagahora 2266-98, Shimoshidami, Moriyama-ku, Nagoya, 463-8560, Japan
Koji Watari
Affiliation:
National Institute of Advanced Industrial Science and Technology, Advanced Sintering Technology Group, Advanced Manufacturing Research Institute, Anagahora 2266-98, Shimoshidami, Moriyama-ku, Nagoya, 463-8560, Japan
*
a)Address all correspondence to this author. e-mail: [email protected]
Get access

Abstract

Colloidally stable suspensions are required to fabricate dense samples with uniform microstructure by colloidal processing methods, which necessitate dispersion of ceramic powders in a liquid medium. Aqueous nano ZrO2 suspensions were prepared using polyethylenimine (PEI) as a dispersant. PEI adsorption on nano ZrO2 surfaces was promoted with increasing initial PEI content and suspension pH. Isoelectric point was shifted from pH 7 at 0 wt% PEI to pH 10.4 at 3 wt% PEI. Stable suspensions had mean particle sizes in the range of 100 to 150 nm and sedimentation rates less than0.4 mm/h, as compared to 2–5.5 μm and 10–50 mm/h for unstable suspensions. Samples with 98% relative density were fabricated after sintering at 1300 °C for 4 h from colloidally stable suspensions.

Keywords

AdsorptionColloidalNanoparticle
Type
Articles
Information
Journal of Materials Research , Volume 20 , Issue 5 , May 2005 , pp. 1348 - 1355
Copyright
Copyright © Materials Research Society 2005

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

1.Aksay, I.A., Lange, F.F. and Davis, B.I.: Uniformity of Al2O3–ZrO2 composites by colloidal filtration. J. Am. Ceram. Soc. 66 C-190 (1983).CrossRefGoogle Scholar
2.Lange, F.F., Davis, B.I. and Wright, E.: Processing-related fracture origins: IV, elimination of voids produced by organic inclusions. J. Am. Ceram. Soc. 69, 66 (1986).CrossRefGoogle Scholar
3.Hackley, V.A.: Colloidal processing of silicon nitride with poly(acrylic acid): I. Adsorption and electrostatic interactions. J. Am. Ceram. Soc. 80, 2315 (1997).CrossRefGoogle Scholar
4.Wang, J. and Gao, L.: Surface properties of polymer adsorbed zirconia nano particles. NanoStruct. Mater. 11, 451 (1999).CrossRefGoogle Scholar
5.Dietrich, A. and Neubrand, A.: Effects of particle size and molecular weight of polyethylenimine on properties of nanoparticulate silicon dispersions. J. Am. Ceram. Soc. 84, 806 (2001).CrossRefGoogle Scholar
6.Fengqiu, T., Xiaoxian, H., Yufeng, Z. and Jingkun, G.: Effect of dispersants on surface chemical properties of nano-zirconia suspensions. Ceram. Int. 26, 93 (2000).CrossRefGoogle Scholar
7.Zhu, X., Fengqiu, T., Suzuki, T.S. and Sakka, Y.: Role of the initial degree of ionization of polyethylenimine in the dispersion of silicon carbide nanoparticles. J. Am. Ceram. Soc. 86, 189 (2003).CrossRefGoogle Scholar
8.Wang, J. and Gao, L.: Adsorption of polyethylenimine on nanosized zirconia particles in aqueous suspensions. J. Colloid Interface Sci. 216, 436 (1999).CrossRefGoogle ScholarPubMed
9.Radeva, T. and Petkanchin, I.: Electric properties and conformation of polyethylenimine at the hematite-aqueous solution interface. J. Colloid Interface Sci. 196, 87 (1997).CrossRefGoogle ScholarPubMed
10.Moreno, R.: The role of slip additives in tape-casting technology: Part I. Solvents and dispersants. Am. Ceram. Soc. Bull. 71, 1521 (1992).Google Scholar
11.Baklouti, S., Pagnoux, C., Chartier, T. and Baumard, J.F.: Processing of aqueous α–Al2O3, α–SiO2, α–SiC suspensions with polyelectrolytes. J. Eur. Ceram. Soc. 17, 1387 (1997).CrossRefGoogle Scholar
12.Böhmer, M.R., Evers, O.A. and Scheutjens, J.M.H.M.: Weak polyelectrolytes between two surfaces: Adsorption and stabilization. Macromolecules 23, 2288 (1990).CrossRefGoogle Scholar
13.Vallar, S., Houivet, D., Fallah, J. El, Kervadec, D. and Haussonne, J-M.: Oxide slurries stability and powders dispersion: Optimization with zeta potential and rheological measurements. J. Eur. Ceram. Soc. 19, 1017 (1999).CrossRefGoogle Scholar