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Thermal decomposition and chemical stabilization of mercurocuprate high-temperature superconductors

Abstract:

We have investigated the thermal decomposition of the mercurocuprate phases HgBa2Ca2Cu3O8+δ, HgBa2CuO4+δ and (Hg0.8Re0.2)Sr2CuO4+δ. In each compound, decomposition is initiated by the breaking of weak Hg-O bonds, but is driven to completion by the formation of thermodynamically stable barium carbonate phases (BaCO3, BaCuO2.(CO3)x). We show that the barium-free mercurocuprate (Hg0.8Re0.2)Sr2CuO4+δ is significantly more thermally stable than HgBa2CuO4+δ, allowing heat treatments at temperatures...

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Publication status:
Published

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Publisher copy:
10.1088/0953-2048/13/4/313

Authors


Peacock, GB More by this author
Haydon, SK More by this author
Gameson, I More by this author
More by this author
Institution:
University of Oxford
Department:
Oxford, MPLS, Chemistry, Inorganic Chemistry
Publisher:
IOP
Journal:
SUPERCONDUCTOR SCIENCE and TECHNOLOGY
Volume:
13
Issue:
4
Pages:
412-416
Publication date:
2000-04-05
DOI:
EISSN:
1361-6668
ISSN:
0953-2048
URN:
uuid:aeb3010d-e4f1-4790-8de4-d648ab27aa07
Source identifiers:
46277
Local pid:
pubs:46277
Language:
English

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