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Thermodynamics of Y2Cu2O5 and YCuO2 and Phase Equilibria in the Ba–Y–Cu–O System
| Title: | Thermodynamics of Y2Cu2O5 and YCuO2 and Phase Equilibria in the Ba–Y–Cu–O System |
| Authors: | Suzuki, Ryosuke O. Browse this author →KAKEN DB | | Okada, Satoshi Browse this author | | Oishi, Toshio Browse this author | | Ono, Katsutoshi Browse this author |
| Keywords: | electromotive force | | BaY2CuO5 | | Y2CuO5 | | YCuO2 | | free energy | | phase diagram |
| Issue Date: | Dec-1990 |
| Publisher: | The Japan Institute of Metals |
| Journal Title: | Materials Transactions, JIM |
| Volume: | 31 |
| Issue: | 12 |
| Start Page: | 1078 |
| End Page: | 1084 |
| Publisher DOI: | 10.2320/matertrans1989.31.1078 |
| Abstract: | Electromotive force (EMF) measurements using ZrO2 solid electrolyte were carried out in the Ba–Y–Cu–O system. Gibbs free energies for the reaction in the cell electrodes were summarized in the equations with linear temperature dependency. The standard free energies of the formation of Y2Cu2O5 and YCuO2 were derived from EMF data and compared with published informations on the stability of Y2Cu2O5.
From the results of the X-ray diffraction measurements for the quenched specimens, the phase equilibria in Y–Cu–O system were determined in the temperature range 923 K to 1223 K. Based on the experimental results, YCuO2 was stable above 1115 K and at the oxygen partial pressure higher than 7.18×10−4 Pa. In the quaternary Ba–Y–Cu–O system, only a few cell could show the stable EMF. The solubilities of barium in both Y2Cu2O5 and YCuO2 were negligibly small. |
| Type: | article |
| URI: | http://hdl.handle.net/2115/74883 |
| Appears in Collections: | 工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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Submitter: 鈴木 亮輔
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