Abstract
The paper considers the production of nanocrystalline α-Al2O3 powder at a temperature below 900 °C. It is shown that α-Al2O3 forms after high-temperature treatment of aluminum nitrate mixed with a mineralizer at 650 °C (holding time of 6 h). The primary particles of α-Al2O3 are 25 to 30 nm in size and the specific surface area is 15.2 m2/g. The powder is used to produce self-reinforced composites in the ZrO2-Y2O3-CeO2-Al2O3 system.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
K. Heussner and N. Claussen, “Y-and Ce-stabilased tetragonal zirconia polycrystals (Y-TZP,Ce-TZP) reinforced with Al2O3 platelets,” J. Europ. Ceram. Soc., 5, No. 3, 193–200 (1989).
A. G. Evans, “Perspective on the development of high-toughness ceramics,” J. Am. Ceram. Soc., 73, No. 2, 187–206 (1990).
F. F. Lange, “Transformation toughening. Part 4. Fabrication, fracture toughness and strength of Al2O3-ZrO2 composites,” J. Mat. Sci., 17, 247–254 (1982).
E. V. Dudnik, A. V. Shevchenko, A. K. Ruban, et al., “Nanograined powders for the production of self-reinforced materials in the ZrO2-Y2O3-CeO2-Al2O3 system,” in: V. V. Skorokhod (ed.), Nanocrystalline Materials [in Russian], Inst. Probl. Materialoved. NAN Ukrainy, Kiev (1998), pp. 24–30.
A. V. Shevchenko, E. V. Dudnik, A. K. Ruban, et al., “Hydrothermal synthesis of nanocrystalline powders in the ZrO2-Y2O3-CeO2 system,” Powder Metall. Met. Ceram., 46, No. 1–2, 18–24 (2007).
E. V. Dudnik, A. V. Shevchenko, A. K. Ruban, et al., “Properties of nanocrystalline powders in the ZrO2-Y2O3-CeO2-Al2O3 system in thermal treatment between 400 and 1300°C,” Dop. NAN Ukrainy, No. 3, 96–102 (2008).
E. V. Dudnik, A. V. Shevchenko, A. K. Ruban, et al., “Effect of thermal treatment on the properties of nanocrystalline powder consisting of 80 wt.% Al2O3-20 wt.% (ZrO2 (CeO2, Y2O3)),” Neorg. Mater., 44, No. 5, 586–591 (2008).
A. P. Garshin, V. M. Gropyanov, G. P. Zaitsev, et al., Ceramics for Mechanical Engineering [in Russian], Nauka, Moscow (2003), p. 381.
V. Isupov, L. Chupakhina, G. Kryukova, and S. Tsybulya, “Fine α-alumina with low alkali: new approach for preparation,” Solid State Ionics, No. 141–142, 471–478 (2001).
H. Lu, H. Sun, A. Mao, et al., “Preparation of plate-like nano α-Al2O3 using nano-aluminum seeds by wet-chemical methods,” Mat. Sci. Eng., A405, 19–23 (2005).
Y-C. Lee, S-B. Wen, L. Wenglin, and C-P. Lin, “Nano α-Al2O3 powder preparation by calcining an emulsion precursor,” J. Am. Ceram. Soc., 90, No. 6, 1723–1727 (2007).
X. Sun, J. Li, F. Zhang, et al., “Synthesis of nanocrystalline α-Al2O3 powders from nanometric ammonium aluminum carbonate hydroxide,” J. Am. Ceram. Soc., 86, No. 8, 1321–1325 (2003).
F-S. Shiau and T-T. Fang, “Low-temperature synthesis of α-alumina using citrate process with α-alumina seeding,” Mat. Chem. Phys., 60, 91–94 (1999).
K. Kamiya, N. Hioki, T. Hashimoto, and H. Nasu, “Formation of α-alumina around 500°C in alkoxy-derived alumina gels under ambient pressure-effects of starting solution composition and seeding,” J. Sol-Gel Sci. Techn., 20, No. 3, 275–285 (2001).
I. S. Kainarskii, É. V. Degtyareva, and I. G. Orlova, Corundum Refractory Materials and Ceramics [in Russian], Metallurgiya, Moscow (1981), p. 168.
R. F. Hill, R. Danzer, and R. T. Paine, “Synthesis of aluminum oxide platelets,” J. Am. Ceram. Soc., 84, No. 3, 514–520 (2001).
Author information
Authors and Affiliations
Corresponding author
Additional information
__________
Translated from Poroshkovaya Metallurgiya, Vol. 47, No. 7–8 (462), pp. 9–14, 2008.
Rights and permissions
About this article
Cite this article
Dudnik, E.V., Shevchenko, A.V., Ruban, A.K. et al. Low-temperature synthesis of α-Al2O3 . Powder Metall Met Ceram 47, 379–383 (2008). https://doi.org/10.1007/s11106-008-9029-z
Received:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s11106-008-9029-z