| Autor: |
Naeem Khan, M., Azad, A.K., Savaniu, C.D., Hing, Peter, Irvine, J.T.S. |
| Zdroj: |
Ionics; Sep2017, Vol. 23 Issue 9, p2387-2396, 10p |
| Abstrakt: |
Single phase polycrystalline BaZrCeYYbO electrolyte material was prepared by solid state reaction route. Rietveld analysis of the XRD data confirms the tetragonal symmetry in the I4/mcm space group with unit cell parameters of a = b = 6.0567(3) Å and c = 8.5831(5) Å. The addition of ZnO as a sintering additive was found to reduce the sintering temperature and enhance both overall sinterability and grain growth. Sintering temperature was reduced by 200-300 °C, and a very high relative density of about 98% was achieved at 1400 °C. Impedance spectroscopy in humidified 5% H/Ar atmosphere shows that the protonic conductivity at 600 °C was 8.60 × 10 S cm. Thermal analysis performed in pure CO atmosphere shows very good chemical stability up to 1200 °C. Good biaxial flexure strength of 100-200 MPa was reported which makes this material a promising electrolyte material for intermediate temperature solid oxide fuel cells (IT-SOFCs). [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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