| Title |
The influence of the technological parameters on the ionic conductivity of samarium doped ceria thin films / |
| Another Title |
Technologinių parametrų įtaka plonų samariu legiruotų cerio oksido sluoksnių savitajam joniniam laidžiui. |
| Authors |
Sriubas, Mantas ; Laukaitis, Giedrius |
| DOI |
10.5755/j01.ms.21.1.5700 |
| Full Text |
|
| Is Part of |
Materials science = Medžiagotyra.. Kaunas : KTU. 2015, vol. 21, no. 1, p. 105-110.. ISSN 1392-1320. eISSN 2029-7289 |
| Keywords [eng] |
samarium doped cerium oxide (SDC) ; e-beam physical vapour deposition ; solid oxide fuel cells (SOFC) ; thin films ; ionic conductivity |
| Abstract [eng] |
Sm0,20Ce0,80O2 powder was used for the formation of samarium doped cerium oxide (SDC) thin films using e-beam physical vapour deposition. Surface area of powder was 34.9 m2/g and particle size – 0.3 μm – 0.5 μm. Thin films were deposited using physical vapor deposition system on SiO2 (optical quartz) and Alloy 600 substrates. The deposition rate 0.2 nm/s ÷ 1.6 nm/s and substrate temperature 20 °C ÷ 600 °C were used. Ionic conductivity investigation revealed that the maximum ionic conductivity (1.67 S/m) has the thin film deposited on 300 °C temperature substrate using 0.4 nm/s deposition rate. Minimum ionic conductivity (0.26 S/m) has thin film, which was deposited on 20 °C temperature substrate using 0.8 nm/s deposition rate. Vacancy activation energies vary in 0.87 eV÷ 0.97 eV range. Furthermore the calculations of crystallite size revealed that crystallite size increases with increasing substrate temperature: from 7.50 nm to 46.23 nm on SiO2 substrate and from 9.30 nm to 44.62 nm on Alloy 600 substrate. Molar concentration of samarium in initial evaporated material is 19.38 mol % and varies from 11.37 mol % to 21 mol % in formed thin films depending on technological parameters. |
| Published |
Kaunas : KTU |
| Type |
Journal article |
| Language |
English |
| Publication date |
2015 |
| CC license |
|
