Abstract
A dense monoclinic zirconia ceramic having a maximum density of 5.85 g/cm3 and grains of 1–5 µm has been prepared from Zr metal powder and water in a Pt capsule by hydrothermal reaction sintering at 1000°C for 3 h under 98 MPa. The effects of temperatures, pressures, and initial compositions on the densification and sintering were studied. The reaction between Zr metal powder and H2O started above ≈300°C under 98 MPa, then produced fine grains of monoclinic ZrO2 and H2. Sintering of these grains started above 700°C, where H2 had permeated the capsule wall. Well-sintered bodies could be prepared at 1000°C under 98 MPa. Higher pressures or higher temperatures did not produce further densification. The highest densifications were observed in the samples with the ratio of H2O/Zr = 2 in the initial compositions. The samples with the ratio H2O/Zr>2.1 did not give well-sintered bodies.
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© 1989 Elsevier Science Publishers LTD
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Yoshimura, M., Sōmiya, S. (1989). Hydrothermal reaction sintering of monoclinic zirconia. In: Sōmiya, S. (eds) Hydrothermal Reactions for Materials Science and Engineering. Springer, Dordrecht. https://doi.org/10.1007/978-94-009-0743-0_4
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DOI: https://doi.org/10.1007/978-94-009-0743-0_4
Publisher Name: Springer, Dordrecht
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