The conversion of a Sr-Ti bimetallic methoxyethoxide precursor into SrTiO3 via hydrolysis and/or calcination was investigated. Hydrolysis with various water/metal molar ratios (rH; rH = 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 rH ≤ 2. At rH ≥ 8, SrTiO3 was crystallized without calcination. Both the hydrolyzed and unhydrolyzed precursors (rH = 0, 0.5, 2) were calcined in dry air at 550°-800°C. SrTiO3 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.
|ジャーナル||Journal of the American Ceramic Society|
|出版ステータス||Published - 2002 9月|
ASJC Scopus subject areas