TY - JOUR
T1 - Kinetic analysis of superconducting YBa2O7, by thermogravimetry in high vacuum
AU - Nagase, Kenzo
AU - Yokobayashi, Hiroko
AU - Kikuchi, Masae
AU - Tokiwa, Ayako
AU - Syono, Yasuhiko
AU - Morioka, Yoshiyuki
PY - 1991/3/15
Y1 - 1991/3/15
N2 - Superconducting YBa2Cu3O7, was subjected to high vacuum thermogravimetry (TG) at various heating rates in the range from room temperature to 1000°C. Two distinct weight-loss steps, each of which corresponds to the evolution of almost 1/202, were observed on the TG curve. The product following the first step was apparently the non-stoichiometric compound YBa2Cu3O7-δ. The rate equation for the first step was dδ/dt = k(1-δ); the corresponding specific rate constant, k, was 1.8 × 10-3 s-1 at 490°C, the activation energy, Ea, was 75 kJ mol-1 and the frequency factor, A, was 3.0 × 102 s-1.
AB - Superconducting YBa2Cu3O7, was subjected to high vacuum thermogravimetry (TG) at various heating rates in the range from room temperature to 1000°C. Two distinct weight-loss steps, each of which corresponds to the evolution of almost 1/202, were observed on the TG curve. The product following the first step was apparently the non-stoichiometric compound YBa2Cu3O7-δ. The rate equation for the first step was dδ/dt = k(1-δ); the corresponding specific rate constant, k, was 1.8 × 10-3 s-1 at 490°C, the activation energy, Ea, was 75 kJ mol-1 and the frequency factor, A, was 3.0 × 102 s-1.
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U2 - 10.1016/0040-6031(91)80067-S
DO - 10.1016/0040-6031(91)80067-S
M3 - Article
AN - SCOPUS:0039256879
VL - 175
SP - 207
EP - 213
JO - Thermochimica Acta
JF - Thermochimica Acta
SN - 0040-6031
IS - 2
ER -