| Item type |
紀要論文 / Departmental Bulletin Paper(1) |
| 公開日 |
2010-11-08 |
| タイトル |
|
|
タイトル |
Phase Equilibrium in the Er-Fe-O System at 1100℃ |
|
言語 |
en |
| 言語 |
|
|
言語 |
eng |
| キーワード |
|
|
主題 |
Plase equilibrium, Thermogravimetry, Erbium-iron oxide, Gibbs energy |
| 資源タイプ |
|
|
資源タイプ識別子 |
http://purl.org/coar/resource_type/c_6501 |
|
資源タイプ |
departmental bulletin paper |
| 著者 |
Kitayama, Kenzo
Ono, Makoto
Yamaguchi, Junpei
Ikarashi, Makoto
Suzuki, Kousuke
|
| 抄録 |
|
|
内容記述タイプ |
Abstract |
|
内容記述 |
Phase equilibrium was established in the Er-Fe-O system at 1100℃ by altering the oxygen partial pressure from -log(Po_2/atm)= 15.00 to 0, allowing construction of a phase diagram at 1100℃ for the system Er_20_3-Fe-Fe_2O_3. In the system, two ternary compounds, ErFeO_3 and Er_3Fe_50_12, were deemed stable and had nonstoichiometric composition, whereas ErFe_20_4 was not found to be stable. The present result was different from that of previous studies at 1200 ℃, in which ErFe_20_4 was stable along with the above two ternary compounds. Lattice constants of ErFeO_3 and Er_3Fe_50_12, prepared in air by a quenching method, were determined and compared with previous values, and showed slight differences. The Gibbs energy changes of the reactions in the Fe-0 system, Fe + 1/2 O_2 = FeO, 3 FeO + 1/2 0_2 = Fe_30_4, and 2/3 Fe_30_4 + 1/6 0_2 = Fe_20_3, were determined, and the obtained values were compared with the previous values. The Gibbs energy changes of the reactions, Fe + 1/2 Er_20_3 + 3/4 0_2 = ErFe0_3, and 3 ErFeO_3 + 2/3 Fe_3O_4 + 1/6 0_2 = Er_3Fe_50_12, were calculated from the oxygen partial pressures in equilibrium. |
| 書誌情報 |
新潟工科大学研究紀要
巻 10,
p. 1-9,
発行日 2005-12
|
| ISSN |
|
|
収録物識別子タイプ |
ISSN |
|
収録物識別子 |
1342-792X |
| 書誌レコードID |
|
|
収録物識別子タイプ |
NCID |
|
収録物識別子 |
AN10590360 |
| 著者版フラグ |
|
|
出版タイプ |
VoR |
|
出版タイプResource |
http://purl.org/coar/version/c_970fb48d4fbd8a85 |
| 出版者 |
|
|
出版者 |
新潟工科大学 |
10_1-9.pdf (749.5 kB)
