TY - JOUR
T1 - Thermal and x-ray analyses of high temperature superconductor YBa2Cu3O6.74
AU - Kikuchi, Masae
AU - Syono, Yasuhiko
AU - Tokiwa, Ayako
AU - Oh-Ishi, Katsuyoshi
AU - Arai, Hide
AU - Hiraga, Kenji
AU - Kobayashi, Norio
AU - Sasaoka, Takaaki
PY - 1987/6
Y1 - 1987/6
N2 - In situ observation of oxygen absorption and desorption during heating and cooling cycle with TG and DTA was done to determine the optimum preparation conditions of high Tc Y-Ba-Cu-O compounds. We suggest the best recipe in air is to fire the raw mixture of 1/2Y2O3, 2BaCO3 and 3CuO at 930°C for more than 10 h, followed by slow cooling in the furnace to take as much oxygen as possible within the specimen. With this method single phase material of an orthorhombic superconducting oxide YBa2Cu3O6.74 with Tc=91.3 K was synthesized, with orthorhombic unit cell dimensions of a=3.8180(6) Å, b=3.8888(7) Å, and c=11.668(2) Å.
AB - In situ observation of oxygen absorption and desorption during heating and cooling cycle with TG and DTA was done to determine the optimum preparation conditions of high Tc Y-Ba-Cu-O compounds. We suggest the best recipe in air is to fire the raw mixture of 1/2Y2O3, 2BaCO3 and 3CuO at 930°C for more than 10 h, followed by slow cooling in the furnace to take as much oxygen as possible within the specimen. With this method single phase material of an orthorhombic superconducting oxide YBa2Cu3O6.74 with Tc=91.3 K was synthesized, with orthorhombic unit cell dimensions of a=3.8180(6) Å, b=3.8888(7) Å, and c=11.668(2) Å.
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U2 - 10.1143/JJAP.26.L1066
DO - 10.1143/JJAP.26.L1066
M3 - Article
AN - SCOPUS:0023367093
VL - 26
SP - 1066
EP - 1099
JO - Japanese Journal of Applied Physics, Part 1: Regular Papers & Short Notes
JF - Japanese Journal of Applied Physics, Part 1: Regular Papers & Short Notes
SN - 0021-4922
IS - 6A
ER -