The resistivity and Seebeck coefficients of YBaCo 2Àx Fe x O 5+d (0pxp0.8) were measured from room temperature (RT) to 800 1C. It was found that all compositions behave as p-type semiconductors in the temperature range of RT-300 1C. When temperature is above about 300 1C, both electrical resistivity
High-temperature transport and electrochemical properties of YBaCo4O7+δ
✍ Scribed by Ekaterina V. Tsipis; Vladislav V. Kharton; Jorge R. Frade; Pedro Núñez
- Publisher
- Springer
- Year
- 2004
- Tongue
- English
- Weight
- 694 KB
- Volume
- 9
- Category
- Article
- ISSN
- 1432-8488
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YBaCo 2Àx Cu x O 5+d (0pxp1) samples were synthesized and the effect of Cu doping on the oxygen desorption and electronic transport properties was investigated from room temperature (RT) to 800 1C. The samples begin to release oxygen when temperature is above approximately 300 1C, and the amount of
Ca 3 À x Er x Co 4 O 9 + d (x ¼ 0, 0.05, 0.15, 0.3 and 0.5) samples were prepared using a sol-gel method followed by hot-pressing sintering technique. Powder X-ray diffraction analysis showed the single-phases of Ca 3 À x Er x Co 4 O 9 + d were obtained up to x ¼ 0.3 and the crystallinity of the sam