Volume 6, No. 4, December 2018
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Synthesis and Characterization of Sc and Y Co-doped Zirconia (Zr0.84Y0.08Sc0.08O1.92) Electrolyte Prepared by Sol-Gel Method

Matthew Bryan P. Villanueva, Renz Marion G. Garcia, Rinlee Butch M. Cervera,
Energy Storage and Conversion Materials Research Laboratory, Department of Mining, Metallurgical, and Materials Engineering, University of the Philippines Diliman, Quezon City 1101, Philippines
Abstract: Y and Sc co-doped ZrO2 [Zr0.84Y0.08Sc0.08O1.92 (4Sc4YSZ)] solid electrolyte was prepared via an alkoxide sol-gel route. 4Sc4YSZ was characterized by TG-DTA, XRD, SEM-EDS and AC impedance spectroscopy. XRD patterns showed that co-doping with Y and Sc resulted to the successful stabilization of the highly conductive cubic phase with a lattice parameter of 5.12 Å. Y and Sc dopants are well-distributed within the ZrO2 particles as evidenced by EDS elemental maps. Total conductivities from 500 °C to 700 °C were determined from AC impedance spectroscopy and an activation energy of 1.31 eV (500-650 °C) was calculated. Even at a low sintering condition of 1200 °C for 5 h, a promising conductivity of 109 mS/cm was achieved for 4Sc4YSZ at 700 °C which is higher than the conductivity of typical 8YSZ solid electrolyte.
 
Keywords: Co-doped ZrO2, ionic conductivity, solid electrolyte; sol-gel; Y and Sc doped ZrO2.

Cite: Matthew Bryan P. Villanueva, Renz Marion G. Garcia, Rinlee Butch M. Cervera, "Synthesis and Characterization of Sc and Y Co-doped Zirconia (Zr0.84Y0.08Sc0.08O1.92) Electrolyte Prepared by Sol-Gel Method," International Journal of Materials Science and Engineering, Vol. 6, No. 4, pp. 99-105, December 2018. doi: 10.17706/ijmse.2018.6.4.99-105

General Information

ISSN: 2315-4527
Editor-in-Chief: Prof. Emeritus Dato' Dr. Muhammad Yahaya
DOI: 10.17706/ijmse
Abstracting/ Indexing: Ulrich's Periodicals Directory, Google Scholar, Crossref
E-mail: ijmse@iap.org