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Copper (I) oxide powder generation by spray pyrolysis

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Abstract

Copper oxide powders were prepared by the spray pyrolysis of copper nitrate solutions over a range of temperatures (400-1300 °C) and residence times (3-7 s). Phase-pure [by x-ray diffraction (XRD)] copper (I) oxide was obtained at 800-1300 °C in an inert (nitrogen) atmosphere. The particles varied from smooth, solid spheres at 1300 °C to irregularly shaped and hollow particles at 800 °C with dense particles of Cu2O being made only at 1000 °C or higher. The particles were polycrystalline with an average crystallite size of 42 nm at 800 °C, while at 1000-1200 °C, the particles were single crystals. Spray pyrolysis in forming gas (7% H2-N2) atmosphere at 500-700 °C gave Cu while spray pyrolysis in air yielded CuO over 800-1000 °C and a mixture of Cu2O/CuO at 1200 °C. These results show that solid, phase-pure Cu2O particles can be produced by aerosol-phase densification at temperatures below its melting point (1235 °C).

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Authors and Affiliations

  1. Center for Micro-engineered Ceramics, Department of Chemical Engineering, University of New Mexico, Albuquerque, New Mexico, 87131, USA

    D. Majumdar, T. A. Shefelbine & T. T. Kodas

  2. DuPont Electronics, DuPont Company, Experimental Station Building E334, P.O. Box 80334, Wilmington, Delaware, 19880, USA

    H. D. Glicksman

Authors
  1. D. Majumdar
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  2. T. A. Shefelbine
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  3. T. T. Kodas
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  4. H. D. Glicksman
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Majumdar, D., Shefelbine, T.A., Kodas, T.T. et al. Copper (I) oxide powder generation by spray pyrolysis. Journal of Materials Research 11, 2861–2868 (1996). https://doi.org/10.1557/JMR.1996.0361

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  • DOI: https://doi.org/10.1557/JMR.1996.0361

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