Abstract
Hydrothermal preparation is one of the methods to.make fine ceramic powders. There are: (1) hydrothermal oxidation, (2) hydrothermal precipitation, (3) hydrothermal synthesis, (4) hydrothermal decomposition, (5) hydrothermal crystallization, etc. Starting materials for hydrothermal oxidation is mainly metal. Reaction between metal and high temperature-high pressure solution occurs to form oxide. Therefore, starting materials for very fine powders are: (1) metal powders or chips, (2) gel, solutions, etc., (3) — oxides and solutions, (4) solids, and (5) hydrous material. This paper describes hydrothermal crystallization and oxidation. Fine powders of ZrO2, Al2O3, HfO2, and Al2O3–ZrO2 are described.
Sintered bodies are also able to get under hydrothermal conditions with reactions. Hydrothermal reaction sintered bodies of iron oxides, Cr 2 O 3, ZrO 2 and HfO 2 were obtained under 100 MPa above 1000°C with 1–5 µm grains.
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Sōmiya, S. (1989). Hydrothermal Preparation and Sintering of Fine Ceramic Powders. In: Sōmiya, S. (eds) Hydrothermal Reactions for Materials Science and Engineering. Springer, Dordrecht. https://doi.org/10.1007/978-94-009-0743-0_8
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DOI: https://doi.org/10.1007/978-94-009-0743-0_8
Publisher Name: Springer, Dordrecht
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