Materials Transactions Online

Materials Transactions, Vol.51 No.03 (2010) pp.578-581
© 2010 The Japan Institute of Metals

Densification of TiO2 Nanopowders by Magnetic Pulsed Compaction

H. S. Kim1, J. G. Lee2, C. K. Rhee2, U. H. Joo3 and S. J. Hong1

1Division of Advanced Materials Engineering, Kongju National University, 275, Budae-dong Cheonan City, Chungnam, 330-717, Korea
2Department of Nuclear Materials Technology Development, Korea Atomic Energy Research Institute, 150 Dukjin-dong Dajeon, 305-353, Korea
3Biomaterials Korea Inc., Guro-gu, Seoul, 152-050, Korea

 In this study, sintered bodies of TiO2 nanopowders were fabricated by the combined application of magnetic pulsed compaction (MPC) and subsequent sintering and then, their density and shrinkage were investigated. The optimum mixing conditions of polyvinyl alcohol, water, and TiO2 nanopowder for compaction were found to be 2–3 mass% PVA, 15–20 mass% water, and 70–85 mass% of TiO2 powder in the sintered bulks. High pressure and rapid compaction using magnetic pulsed compaction (MPC) enhanced the density with the increasing MPC pressure up to 0.7 GPa and significantly reduced the shrinkage rate (about 15% in this case) of the sintered bulks compared to the general process (about 18%).

(Received 2009/9/29; Accepted 2009/12/24; Published 2010/2/25)

Keywords: TiO2 nanopowder, magnetic pulsed compaction (MPC), densification, sintering

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