Nonstoichiometry and electrical resistivity in two mixed metal oxides, La2NiO4-x and LaSrNiO4-x.

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概要

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• Two mixed oxides, La<SUB>2</SUB>NiO<SUB>4−<I>x</I></SUB> and LaSrNiO<SUB>4−<I>x</I></SUB>, had the K<SUB>2</SUB>NiF<SUB>4</SUB> structure in the oxygen-pressure range from 58000 down to 130 Pa at 1173 K. The oxygen-vacancy concentration, <I>x</I>, in both La<SUB>2</SUB>NiO<SUB>4−<I>x</I></SUB> and in LaSrNiO<SUB>4−<I>x</I></SUB> at 1173 K was determined by thermogravimetric analysis in the oxygen-pressure range from 58000 to 1.3 Pa. The vacancy concentration of LaSrNiO<SUB>4−<I>x</I></SUB> was greater than that of La<SUB>2</SUB>NiO<SUB>4−<I>x</I></SUB> at the same oxygen pressure at 1173 K. The electrical resistivities of La<SUB>2</SUB>NiO<SUB>4−<I>x</I></SUB> and LaSrNiO<SUB>4−<I>x</I></SUB> were measured at 473–1173 K under an oxygen atmosphere at 98–58000 Pa. The density of the state and the drift mobility of oxygen stoichiometric La<SUB>2</SUB>NiO<SUB>4</SUB> and LaSrNiO<SUB>4</SUB> were estimated from the resistivity data and from the results on the thermogravimetric analysis.

• 公益社団法人 日本化学会の論文

著者

• Kondo Shin-ichi

  Department Of Applied Physics Faculty Of Engineering Fukui University

• Suzuki Shigenori

  Department Of Human Care Asai Gaguen University

• Suzuki Yasuo

  Department Of Applied Physics Faculty Of Engineering Fukui University

• Ishikawa Kenji

  Department of Earth and Space Science, Graduate School of Science, Osaka University, 1-1 Machikaneyama, Toyonaka, Osaka 560-0043, Japan

• Suzuki Shigenori

  Department of Industrial Chemistry, Faculty of Engineering, Meiji University

• Okano Hirofumi

  Department of Industrial Chemistry, Faculty of Engineering, Meiji University

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