Synthesis of the p-type semiconducting ternary oxide CuAlO{sub 2} using the Pechini method

Journal Article · Tue Oct 15 00:00:00 EDT 2013 · Materials Research Bulletin

DOI:https://doi.org/10.1016/J.MATERRESBULL.2013.06.003· OSTI ID:22285119

Bafia, Julie; Gebreslasse, Tsige ^[1]; Ingram, Brian J.; Carter, J. David ^[2]

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1. College of DuPage, 425 Fawell Boulevard, Glen Ellyn, IL 60137-6599 (United States)
2. Chemical Sciences and Engineering Division, Argonne National Laboratory, Argonne, IL 60439 (United States)

Graphical abstract: - Highlights: • We have prepared single-phase samples of the semiconducting oxide CuAlO{sub 2} using the Pechini method. • Reaction times are reduced relative to conventional solid-state synthesis. • Products have high surface area suitable for ceramic processing. • Product composition is dictated by thermodynamic control; CuAl{sub 2}O{sub 4} is obtained preferentially at lower temperature. - Abstract: The synthesis of the delafossite phase CuAlO{sub 2} using the Pechini method was investigated. Powder X-ray diffraction data showed that pure, single-phase samples were obtained after only 3 h heating at 1100 °C. CuAl{sub 2}O{sub 4}, which contains Cu(II) rather than Cu(I), was the dominant phase between 700 and 1100 °C. Conversion to CuAlO{sub 2} is promoted by the positive entropy change associated with the evolution of oxygen. No mixed Cu–Al oxide was formed below 700 °C.

• OSTI ID: 22285119
• Journal Information: Materials Research Bulletin, Vol. 48, Issue 10; Other Information: Copyright (c) 2013 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); ISSN 0025-5408
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ENTROPY
OXIDES
OXYGEN
PHASE DIAGRAMS
SEMICONDUCTOR MATERIALS
SURFACE AREA
SYNTHESIS
X-RAY DIFFRACTION