Doping Calcia and Yttria into Zirconia Obtained from by Product of Tin Concentrator to Improve its Ionic Conductivity
| Main Authors: | Rahmawati, Fitria, Prijamboedi, Bambang, Soepriyanto, Syoni, Ismunandar, |
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| Format: | Article PeerReviewed application/pdf |
| Terbitan: |
, 2011
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| Subjects: | |
| Online Access: |
http://eprints.uns.ac.id/874/1/197510102000032001author_copy.PDF http://eprints.uns.ac.id/874/ |
Daftar Isi:
- Zirconia has been prepared from Zircon concentrate by caustic fusion methods. Zircon is a by product from tin ore concentration plant at Bangka island of Indonesia. Yttria Stabilized-Zirconia (YSZ) was prepared by introducing the 8 % mol yttrium oxide into zirconia and sintered at 1500 �C for 5 hours. In order to obtain constant oxygen vacancy of 8 % mol in Zirconia, an appropriate amount of Yttria and Calcia were introduced into Zirconia and the mixtures were heated at 1350 oC for 5 hours. Elemental composition was determined by SEM/EDX and XRF and lattice parameters were determined using X-ray diffraction method. Ionic conductivity was measured by complex impedance spectroscopy. The results show that doping of Yttria into Zirconia (YSZ) and Calcia-Yttria into Zirconia (CYZ) allows phase transformation of Zirconia from tetragonal with space group P42/nmc into cubic Fm3m and enhance the ionic conductivity. However, the prepared materials are porous and have not met the requirement for the electrolyte material yet. Keywords: electrolyte material; CYZ; SOFC; YSZ; zircon.