Conversion process of strontium-titanium bimetallic methoxyethoxide precursor into SrTiO 3 via hydrolysis/calcination

Junko Okayama, Itaru Takaya, Keiichi Nashimoto, Yoshiyuki Sugahara

    Research output: Contribution to journalArticle

    2 Citations (Scopus)

    Abstract

    The conversion of a Sr-Ti bimetallic methoxyethoxide precursor into SrTiO 3 via hydrolysis and/or calcination was investigated. Hydrolysis with various water/metal molar ratios (r H; r H = 0.5, 2, 4, 6, 8, 10) in tetrahydrofuran at reflux resulted in a decrease in the amount of the methoxyethoxyl groups, and the hydrolyzed products were soluble with r H ≤ 2. At r H ≥ 8, SrTiO 3 was crystallized without calcination. Both the hydrolyzed and unhydrolyzed precursors (r H = 0, 0.5, 2) were calcined in dry air at 550°-800°C. SrTiO 3 was crystallized on calcination at ≥550°C from amorphous materials with a considerable loss of carbon, which was present as both chars and carbonate ions.

    Original languageEnglish
    Pages (from-to)2195-2199
    Number of pages5
    JournalJournal of the American Ceramic Society
    Volume85
    Issue number9
    Publication statusPublished - 2002 Sep

    Fingerprint

    Strontium
    Titanium
    Calcination
    Hydrolysis
    Hydrogen
    Carbonates
    Carbon
    Metals
    Ions
    Water
    Air

    ASJC Scopus subject areas

    • Ceramics and Composites

    Cite this

    Conversion process of strontium-titanium bimetallic methoxyethoxide precursor into SrTiO 3 via hydrolysis/calcination. / Okayama, Junko; Takaya, Itaru; Nashimoto, Keiichi; Sugahara, Yoshiyuki.

    In: Journal of the American Ceramic Society, Vol. 85, No. 9, 09.2002, p. 2195-2199.

    Research output: Contribution to journalArticle

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    abstract = "The conversion of a Sr-Ti bimetallic methoxyethoxide precursor into SrTiO 3 via hydrolysis and/or calcination was investigated. Hydrolysis with various water/metal molar ratios (r H; r H = 0.5, 2, 4, 6, 8, 10) in tetrahydrofuran at reflux resulted in a decrease in the amount of the methoxyethoxyl groups, and the hydrolyzed products were soluble with r H ≤ 2. At r H ≥ 8, SrTiO 3 was crystallized without calcination. Both the hydrolyzed and unhydrolyzed precursors (r H = 0, 0.5, 2) were calcined in dry air at 550°-800°C. SrTiO 3 was crystallized on calcination at ≥550°C from amorphous materials with a considerable loss of carbon, which was present as both chars and carbonate ions.",
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