Preparation of Fine Monoclinic Hafnia Powders by Hydrothermal Oxidation

Hideo Toraya; Masahiro Yoshimura; Shigeyuki Somiya

doi:10.1111/j.1151-2916.1982.tb10438.x

Preparation of Fine Monoclinic Hafnia Powders by Hydrothermal Oxidation

Hideo Toraya
, Masahiro Yoshimura
, Shigeyuki Somiya

Department of Materials Science and Engineering

Research output: Contribution to journal › Article › peer-review

18 Citations (Scopus)

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.

Original language	English
Pages (from-to)	c72-c72
Journal	Journal of the American Ceramic Society
Volume	65
Issue number	5
DOIs	https://doi.org/10.1111/j.1151-2916.1982.tb10438.x
Publication status	Published - 1982 May

All Science Journal Classification (ASJC) codes

Ceramics and Composites
Materials Chemistry

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10.1111/j.1151-2916.1982.tb10438.x

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title = "Preparation of Fine Monoclinic Hafnia Powders by Hydrothermal Oxidation",

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.",

author = "Hideo Toraya and Masahiro Yoshimura and Shigeyuki Somiya",

year = "1982",

month = may,

doi = "10.1111/j.1151-2916.1982.tb10438.x",

language = "English",

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journal = "Journal of the American Ceramic Society",

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T1 - Preparation of Fine Monoclinic Hafnia Powders by Hydrothermal Oxidation

AU - Toraya, Hideo

AU - Yoshimura, Masahiro

AU - Somiya, Shigeyuki

PY - 1982/5

Y1 - 1982/5

N2 - 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.

AB - 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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UR - https://www.scopus.com/pages/publications/84943409653#tab=citedBy

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DO - 10.1111/j.1151-2916.1982.tb10438.x

M3 - Article

AN - SCOPUS:84943409653

SN - 0002-7820

VL - 65

SP - c72-c72

JO - Journal of the American Ceramic Society

JF - Journal of the American Ceramic Society

IS - 5

ER -

Preparation of Fine Monoclinic Hafnia Powders by Hydrothermal Oxidation

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