Mercury nonstoichiometry of the Hg1-xBa2CuO4+d superconductor and the P(Hg)-P(O2)-T phase diagram of the Hg-Ba-Cu-O system

Авторы: Alyoshin V.A., Mikhailova D.A., Rudnyi E.B., Antipov E.V.
Журнал: Physica С: Superconductivity
Том: 383
Номер: 1-2
Год издания: 2002
Первая страница: 59
Последняя страница: 74
DOI: 10.1016/S0921-4534(02)01270-4
Аннотация: The P(Hg)–P(O2)–T phase diagram of the Hg–Ba–Cu–O system for the Ba:Cu ¼ 2:1 ratio was experimentally studied and followed by means of the thermodynamic modeling. It was shown that the Hg1xBa2CuO4þd (Hg-1201) superconductor possesses a significant range of Hg-nonstoichiometry and exists in a certain P(Hg), P(O2) and T range. Mercury nonstoichiometry of Hg-1201 was investigated in the 9236T 61095 K; 2:06PðHgÞ68:4 atm; 0:096 PðO2Þ60:86 atm ranges. It was found that the mercury content varies in the range of 0.80–0.94 under these conditions. The Gibbs energy of the Hg-1201 phase was estimated as a function of temperature and mercury concentration. The obtained results allow optimizing the synthesis conditions of Hg-1201 with a given Hg-content including preparation of the Hg-stoichiometric phase.
Добавил в систему: Алёшин Владимир Алексеевич

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