Thermal anisotropy of tialite (Al2TiO5) by powder XRD

Jacob Zabicky, Giora Kimmel, Josef Yaaran, Lev Zevin

    Research output: Contribution to journalArticlepeer-review

    7 Scopus citations

    Abstract

    Tialite was synthesized from stoichiometric mixtures of commercial corundum and rutile (8-10 μm) or nanophase coprecipitated alumina and titania precursor powders. Uniaxially compressed tablets of these precursors were calcinated at a temperature in the 1,200-1,500°C range, and cooled to room temperature. One of the nanometric precursors showed appearance of tialite already at 1,300°C, while the commercial powders began to react only at 1,400°C. In all cases the synthesis was complete at 1,500°C. The X-ray diffractograms of the products showed that tialite derived from commercial precursors assumed a preferred orientation, which was probably induced by the compression of the tablet. No anisotropy was noted after adding a small amount of silica to the commercial powder, however, this led to mullite formation. Nanophase precursors yielded crystallites with random orientation.

    Original languageEnglish
    Pages (from-to)675-678
    Number of pages4
    JournalNanostructured Materials
    Volume6
    Issue number5-8
    DOIs
    StatePublished - 1 Jan 1995

    ASJC Scopus subject areas

    • General Materials Science
    • Condensed Matter Physics

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