Synthesis, processing and characterization of nanocrystalline titanium dioxide

    Authors

    S. P. Qiu;S. J. Kalita

    Comments

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    Abbreviated Journal Title

    Mater. Sci. Eng. A-Struct. Mater. Prop. Microstruct. Process.

    Keywords

    titanium dioxide; sol-gel; nanopowder; synthesis; mechanical properties; MECHANICAL-PROPERTIES; PHASE-STABILITY; GAS SENSORS; TIO2 FILMS; THIN-FILMS; TRANSFORMATION; TEMPERATURE; DEPOSITION; COATINGS; POWDER; Nanoscience & Nanotechnology; Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering

    Abstract

    Nanocrystalline titanium dioxide (TiO2) powder was synthesized by using a simple sol-gel technique, which can be easily controlled and reproduced. By hydrolyzing titanium tetraisopropoxide in a mixture of isopropanol and deionized water, TiO2 nanopowder was obtained after calcination at 400 degrees C. The powder was analyzed for its phases using X-ray diffraction technique and found to be pure anatase. Crystallite size, powder morphology and lattice fringes were determined using high-resolution TEM. DSC and TGA were used to study the thermal properties. As-synthesized powder was uniaxially compacted and sintered at 1300-1600 degrees C to investigate densification behavior and mechanical properties. Maximum hardness (472 +/- 30 HV) and the best sintered density (3.75 g/cm(3)) were attained in structures sintered at 1600 degrees C, whereas, the highest compressive strength (364 +/- 11MPa) was achieved in structures sintered at 1500 degrees C. (c) 2006 Elsevier B.V. All rights reserved.

    Journal Title

    Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing

    Volume

    435

    Publication Date

    1-1-2006

    Document Type

    Article

    Language

    English

    First Page

    327

    Last Page

    332

    WOS Identifier

    WOS:000241683200043

    ISSN

    0921-5093

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