Abstract
Fine single-phase monoclinic HfO2 powders were prepared from Hf metal chips and high-temperature high-pressure water by hydrothermal oxidation in closed and open systems. In the closed system, Hf metal was converted to HfO2 by treatment at ≥600°C under 100 MPa for 3 h. At 500° C half the Hf reacted to produce Hf hydride and a small amount of HfO2. In the open system, Hf metal scarcely reacted at 500°C, but at 600°C the reaction was more rapid than the corresponding run in the closed system.
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© 1989 Elsevier Science Publishers LTD
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Toraya, H., Yoshimura, M., Sōmiya, S. (1989). Preparation of Fine Monoclinic Hafnia Powders by Hydrothermal Oxidation. In: Sōmiya, S. (eds) Hydrothermal Reactions for Materials Science and Engineering. Springer, Dordrecht. https://doi.org/10.1007/978-94-009-0743-0_11
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DOI: https://doi.org/10.1007/978-94-009-0743-0_11
Publisher Name: Springer, Dordrecht
Print ISBN: 978-94-010-6819-2
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