Copper (I) oxide powder generation by spray pyrolysis

Journal Article · Fri Nov 01 04:00:00 EST 1996 · Journal of Materials Research

DOI:https://doi.org/10.1557/JMR.1996.0361· OSTI ID:399781

Majumdar, D; Shefelbine, T A; Kodas, T T ^[1]; Glicksman, H D ^[2]

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1. Center for Micro-engineered Ceramics, Department of Chemical Engineering, University of New Mexico, Albuquerque, New Mexico 87131 (United States)
2. DuPont Electronics, DuPont Company, Experimental Station Building E334, P.O. Box 80334, Wilmington, Delaware 19880 (United States)

Copper oxide powders were prepared by the spray pyrolysis of copper nitrate solutions over a range of temperatures (400{endash}1300{degree}C) and residence times (3{endash}7 s). Phase-pure [by x-ray diffraction (XRD)] copper (I) oxide was obtained at 800{endash}1300{degree}C in an inert (nitrogen) atmosphere. The particles varied from smooth, solid spheres at 1300{degree}C to irregularly shaped and hollow particles at 800{degree}C with dense particles of Cu{sub 2}O being made only at 1000{degree}C or higher. The particles were polycrystalline with an average crystallite size of 42 nm at 800{degree}C, while at 1000{endash}1200{degree}C, the particles were single crystals. Spray-pyrolysis in forming gas (7{percent} H{sub 2}{endash}N{sub 2}) atmosphere at 500{endash}700{degree}C gave Cu while spray pyrolysis in air yielded CuO over 800{endash}1000{degree}C and a mixture of Cu{sub 2}O/CuO at 1200{degree}C. These results show that solid, phase-pure Cu{sub 2}O particles can be produced by aerosol-phase densification at temperatures below its melting point (1235{degree}C). {copyright} {ital 1996 Materials Research Society.}

• OSTI ID: 399781
• Journal Information: Journal of Materials Research, Journal Name: Journal of Materials Research Journal Issue: 11 Vol. 11; ISSN JMREEE; ISSN 0884-2914
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CHEMICAL PREPARATION
CHEMICAL REACTION KINETICS
COPPER OXIDES
GRAIN SIZE
MORPHOLOGY
PHASE STUDIES
POWDERS
TEMPERATURE DEPENDENCE
TEMPERATURE RANGE 0400-1000 K
TEMPERATURE RANGE 1000-4000 K