TY - JOUR
T1 - Conversion process of strontium-titanium bimetallic methoxyethoxide precursor into SrTiO3 via hydrolysis/calcination
AU - Okayama, Junko
AU - Takaya, Itaru
AU - Nashimoto, Keiichi
AU - Sugahara, Yoshiyuki
PY - 2002/9
Y1 - 2002/9
N2 - 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.
AB - 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.
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U2 - 10.1111/j.1151-2916.2002.tb00434.x
DO - 10.1111/j.1151-2916.2002.tb00434.x
M3 - Article
AN - SCOPUS:0036737035
SN - 0002-7820
VL - 85
SP - 2195
EP - 2199
JO - Journal of the American Ceramic Society
JF - Journal of the American Ceramic Society
IS - 9
ER -