Jump to main content
Jump to site search

Issue 10, 2010
Previous Article Next Article

Hydrothermal synthesis of novel alpha alumina nano-materials with controlled morphologies and high thermal stabilities

Author affiliations

Abstract

Following a strong demand for novel α-Al2O3 nano-materials with unique properties, both pure and doped nano-sheets, nano-needles, and nanosized equiaxed particles (reference) of 100% phase-pure α-Al2O3, were synthesized at 430–450 °C under 10.3 MPa pressure by the hydrothermal treatment of boehmite powder (γ-AlOOH) in the presence of α-Al2O3 seeds and 1–10% morphology modifiers. SiO2 and H3BO3 were used as morphology modifiers to produce phase pure α-Al2O3 nano-sheets and nano-needles, respectively, that exhibited strong crystallographic c- and a-faceting and BET surface areas up to 40 m2 g−1 stable above 1000 °C. A mesocrystal growth mechanism of the α-Al2O3 nano-particles was observed. Unprecedented flexibility to control the sizes and morphologies of α-Al2O3 enabled fabrication of 90% porous ceramics with unique pore geometries and pore volumes up to 1.5 cm3 g−1. These novel α-Al2O3 nano-materials can be useful in a variety of catalytic applications, nano-filtration, chemical-mechanical planarization, composites, etc.

Graphical abstract: Hydrothermal synthesis of novel alpha alumina nano-materials with controlled morphologies and high thermal stabilities

Back to tab navigation

Publication details

The article was received on 23 Dec 2009, accepted on 06 Apr 2010 and first published on 29 May 2010


Article type: Paper
DOI: 10.1039/B927192A
Citation: CrystEngComm, 2010,12, 2996-3002
  •   Request permissions

    Hydrothermal synthesis of novel alpha alumina nano-materials with controlled morphologies and high thermal stabilities

    W. L. Suchanek and J. M. Garcés, CrystEngComm, 2010, 12, 2996
    DOI: 10.1039/B927192A

Search articles by author

Spotlight

Advertisements