Synthesis of delafossite type oxides CuMO2 (M=Fe, Al, Y, Ga) by the citric-acid based gel technology

Daisuke Nagai, Minoru Osada, Masato Kakihana

Research output: Contribution to journalArticlepeer-review


Powders of CuMO2 (M=Fe, Al, Y, Ga) with delafossite structure were synthesized by a gel technology using citric acid (CA) as a complexant. Heating of a mixed solution of CA, H2O and the constituent metals at 130°C gave a brown transparent gel. The gel was preheated at 350°C to give a powder precursor which was subsequently converted to oxides by heat-treating it at 700°C-1050°C for 12h either in N2 or in air. X-Ray diffraction and Raman scattering analyses showed that all the samples are virtually of single-phase without any indication of secondary phases. Pure CuMO2 was successfully synthesized by the CA-based gel technology at lower temperature and with shorter sintering time when compared with those for the conventional solid-state reaction technique.

Original languageEnglish
Pages (from-to)185-188
Number of pages4
JournalFuntai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy
Issue number2
Publication statusPublished - 1999 Feb
Externally publishedYes

ASJC Scopus subject areas

  • Mechanical Engineering
  • Metals and Alloys


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