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On the thermal stability of the barium-copper oxide BaCuO2 at 900–1100°C in air

  • Proceedings of the International Symposium “Order, Disorder, and Properties of Oxides” (ODPO-11)
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Bulletin of the Russian Academy of Sciences: Physics Aims and scope

Abstract

Phase relations in the 45.0–65.0 mol % CuO region of the BaO-CuO x system at P(O2) = 21 kPa have been studied by visual polythermal analysis (VPA), X-ray phase analysis (XPA), differential thermal analysis (DTA), thermogravimetric analysis (TGA), chemical analysis (CA), X-ray microprobe analysis (XMEA), and electron diffraction (ED) and elemental analysis (EA) in a transmission electron microscope (TEM). It is found that the investigated region of the diagram consists of several crystallization fields related to barium—copper oxides of cationic (Ba: Cu) compositions of 4: 5, 5: 6, 7: 8, 12: 13, and 24: 25 with the cubic structure of BaCuO2 oxide. They can be represented as a Ba m Cu m + n O y homologous series, where m = 3, 4, 5, …, n = l, 2. The 24: 25 oxide has the highest melting point in the studied region of the phase diagram. The BaCuO2 oxide does not exist in the subsolidus region under these conditions and does not have its own crystallization field.

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Authors and Affiliations

  1. Institute of Solid State Physics, Russian Academy of Sciences, Chernogolovka, 142432, Russia

    L. A. Klinkova & N. V. Barkovskii

  2. Institute of Microelectronics Technology, Russian Academy of Sciences, Chernogolovka, 142432, Russia

    V. I. Nikolaichik

  3. Institute of Experimental Mineralogy, Russian Academy of Sciences, Chernogolovka, 142432, Russia

    K. V. Van

Authors
  1. L. A. Klinkova
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  2. V. I. Nikolaichik
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  3. N. V. Barkovskii
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  4. K. V. Van
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Corresponding author

Correspondence to L. A. Klinkova.

Additional information

Original Russian Text © L.A. Klinkova, V.I. Nikolaichik, N.V. Barkovskii, K.V. Van, 2009, published in Izvestiya Rossiiskoi Akademii Nauk. Seriya Fizicheskaya, 2009, Vol. 73, No. 8, pp. 1170–1171.

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Klinkova, L.A., Nikolaichik, V.I., Barkovskii, N.V. et al. On the thermal stability of the barium-copper oxide BaCuO2 at 900–1100°C in air. Bull. Russ. Acad. Sci. Phys. 73, 1107–1109 (2009). https://doi.org/10.3103/S1062873809080255

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  • DOI: https://doi.org/10.3103/S1062873809080255

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