TY - JOUR
T1 - Low temperature synthesis of perovskite oxide using the adsorption properties of cellulose
AU - Shao, Zongping
AU - Xiong, Guoxing
AU - Ren, Yanjie
AU - Cong, You
AU - Yang, Weishen
PY - 2000/11
Y1 - 2000/11
N2 - La0.8Sr0.2CoO3 (LSCO) oxide powder was prepared using the adsorption properties of cellulose. The preparation process was studied by XRD, FTIR, TG-DTA and CO2-TPD techniques. The results of XRD, IR and TG-DTA testified that cellulose could successfully reserve the homogeneity of the solution system to the solid precursor. During the early stage of pyrolysis, cellulose was partially oxidized, and some COO- groups appeared in its texture, which were then complexed with the adsorbed metal ions, and effectively suppressed the aggregation of metal ions. Formation of a pure perovskite and the properties of the powder resulted were found to be significantly influenced by the cellulose to metal nitrate ratio. Also the properties of the resulting powder were greatly influenced by the calcination conditions. If the produced carbon dioxide could not be eluted in time, carbonate would be formed in the bulk. Hence, a high calcination temperature (>800°C) was needed to acquire a pure phase LSCO. At optimized conditions, nano-crystal LSCO could be obtained at as low as 500°C.
AB - La0.8Sr0.2CoO3 (LSCO) oxide powder was prepared using the adsorption properties of cellulose. The preparation process was studied by XRD, FTIR, TG-DTA and CO2-TPD techniques. The results of XRD, IR and TG-DTA testified that cellulose could successfully reserve the homogeneity of the solution system to the solid precursor. During the early stage of pyrolysis, cellulose was partially oxidized, and some COO- groups appeared in its texture, which were then complexed with the adsorbed metal ions, and effectively suppressed the aggregation of metal ions. Formation of a pure perovskite and the properties of the powder resulted were found to be significantly influenced by the cellulose to metal nitrate ratio. Also the properties of the resulting powder were greatly influenced by the calcination conditions. If the produced carbon dioxide could not be eluted in time, carbonate would be formed in the bulk. Hence, a high calcination temperature (>800°C) was needed to acquire a pure phase LSCO. At optimized conditions, nano-crystal LSCO could be obtained at as low as 500°C.
UR - http://www.scopus.com/inward/record.url?scp=0034317517&partnerID=8YFLogxK
U2 - 10.1023/A:1004837920569
DO - 10.1023/A:1004837920569
M3 - 文章
AN - SCOPUS:0034317517
SN - 0022-2461
VL - 35
SP - 5639
EP - 5644
JO - Journal of Materials Science
JF - Journal of Materials Science
IS - 22
ER -