Abstract
A systematic evaluation of the electrical conductivity of Sr-substituted YAlO3 system has been performed. A comparison between the Ca- and Sr-doped YAlO3 systems is reported. The samples have been synthesized by citrate gel route, and the electrical conductivity measurements have been conducted in air in the 300–800 °C temperature range. The influence of phase development of the compositions on the total conductivity has been investigated using the x-ray diffraction technique. Also, the effect of microstructure and composition of the phases evolved on the electrical conductivity has been analyzed using scanning electron microscopy and energy dispersive spectrum techniques.
Similar content being viewed by others
References
B.B. Owens: Solid state electrolytes: Overview of materials and applications during the last third of the twentieth century. J. Power Sources 90(1), 2 (2000).
A.B. Stambouli and E. Traversa: Solid oxide fuel cells (SOFCs): A review of an environmentally clean and efficient source of energy. Renewable Sustainable Energy Rev. 6(5), 433 (2002).
O. Yamamoto: Solid oxide fuel cells: Fundamental aspects and prospects. Electrochim. Acta 45(15–16), 2423 (2000).
B.C.H. Steele and A. Heinzel: Materials for fuel-cell technologies. Nature 414, 345 (2001).
V.V. Kharton, F.M.B. Marques, and A. Atkinson: Transport properties of solid oxide electrolyte ceramics: A brief review. Solid State Ionics 174(1–4), 135 (2004).
J.A. Kilner: Fast anion transport in solids. Solid State Ionics 8(3), 201 (1983).
S. Nakayama and M. Sakamoto: Electrical properties of new type high oxide ionic conductor RE10Si6O27 (RE = La, Pr, Nd, Sm, Gd, Dy). J. Eur. Ceram. Soc. 18(10), 1413 (1998).
M. Feng and J.B. Goodenough: A superior oxide-ion electrolyte. Eur. J. Solid State Inorg. Chem. 31(8–9), 663 (1994).
K. Huang and J.B. Goodenough: A solid oxide fuel cell based on Sr- and Mg-doped LaGaO3 electrolyte: The role of a rare-earth oxide buffer. J. Alloys Compd. 303-302, 454 (2000).
J.W. Fergus: Electrolytes for solid oxide fuel cells. J. Power Sources 162(1), 30 (2006).
E. Djurado and M. Labeau: Second phases in doped lanthanum gallate perovskites. J. Eur. Ceram. Soc. 18(10), 1397 (1998).
N.M. Sammes, F.M. Keppeler, H. Näfe, and F. Aldinger: Mechanical properties of solid-synthesized strontium- and magnesium-doped lanthanum gallate. J. Am. Ceram. Soc. 81, 3104 (1998).
K. Yamaji, H. Negishi, T. Horita, N. Sakai, and H. Yokokawa: Vaporization process of Ga from doped LaGaO3 electrolytes in reducing atmospheres. Solid State Ionics 135, 389 (2000).
S. Geller and V.B. Bala: Crystallographic studies of perovskite-like compounds. II. Rare earth alluminates. Acta Crystallogr. 9, 1019 (1956).
D. Lybye, F.W. Poulsen, and M. Mogensen: Conductivity of A- and B-site doped LaAlO3, LaGaO3, LaScO3 and LaInO3 perovskites. Solid State Ionics 128(1), 91 (2000).
C.B. Alcock, J.W. Fergus, and L. Wang: The electrolytic properties of LaYO3 and LaAlO3 doped with alkaline-earth oxides. Solid State Ionics 51(3–4), 291 (1992).
J.A. Kilner, P. Barrow, R.J. Brook, and M.J. Norgett: Electrolyte for the high temperature fuel cell; experimental and theoretical studies of the perovskite LaAlO3. J. Power Sources 3, 67 (1978).
T. Ishihara, H. Matsuda, Y. Mizuhara, and Y. Takita: Improved oxygen ion conductivity of NdAlO3 perovskite-type oxide by doping with Ga. Solid State Ionics 70-71(1), 234 (1994).
T. Tsuji, Y. Ohashi, and Y. Yamamura: Effect of ionic radius on electrical conductivity of doped SmAlO3 perovskite oxide. Solid State Ionics 154-155, 541 (2002).
A. Sinha, B.P. Sharma, and P. Gopalan: Development of novel perovskite based oxide ion conductor. Electrochim. Acta 51(7), 1184 (2006).
M. Medraj, R. Hammond, M.A. Parvez, R.A.L. Drew, and W.T. Thompson: High temperature neutron diffraction study of the Al2O3-Y2O3 system. J. Eur. Ceram. Soc. 26(16), 3515 (2006).
H. Yasuda, I. Ohnaka, Y. Mizutani, and Y. Waku: Selection of eutectic systems in Al2O3Y2O3 ceramics. Sci. Technol. Adv. Mater. 2, 67 (2001).
R. Hariharan, A. Venkatasubramanian, and P. Gopalan: Solid-state synthesis and characterization of Ca-substituted YAlO3 as electrolyte for solid oxide fuel cells. J. Solid State Electrochem. 14, 1657 (2010).
R. Hariharan and P. Gopalan: Chemical synthesis and characterization of Ca-substituted YAlO3 as electrolyte for solid oxide fuel cells. J. Alloys Compd. 496, 528 (2010).
P.S. Anderson, G.C. Mather, F.M.B. Marques, D.C. Sinclair, and A.R. West: Synthesis and characterisation of La0.95Sr0.05GaO3-σ, La0.95Sr0.05AlO3-σ and Y0.95Sr0.05AlO3-σ. J. Eur. Ceram. Soc. 19, 1665 (1999).
R. Diehl and G. Brandt: Crystal structure refinement of YAlO3, a promising laser material. Mater. Res. Bull. 10, 85 (1975).
J. Chen, G. Zhao, D. Cao, Q. Dong, Y. Ding, and S. Zhou: Computer simulation of intrinsic defects in YAlO3 single crystal. Physica B 404(20), 3405 (2009).
J.W. Stevenson, T.R. Armstrong, D.E. McGready, L.R. Pederson, and W.J. Weber: Processing and electrical Properties of alkaline earth-doped lanthanum gallate. J. Electrochem. Soc. 144, 3613 (1997).
T.Y. Nguyen, M. Dokiya, S. Wang, H. Tagawa, and T. Hashimoto: The effect of oxygen vacancy on the oxide ion mobility in LaAlO3-based oxide. Solid State Ionics 130, 229 (2000).
R.D. Shannon: Revised effective ionic radii and systematic studies of interatomic distances in halides and chalcogenides. Acta Crystallogr., Sect. A: Found. Crystallogr. 32(5), 751 (1976).
J.B. Bauerle: Study of solid electrolyte polarization by a complex admittance method. J. Phys. Chem. Solids 30, 2657 (1969).
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Hariharan, R., Gopalan, P. Effect of A-site substitution on electrical conductivity and microstructure of YAlO3. Journal of Materials Research 27, 2017–2023 (2012). https://doi.org/10.1557/jmr.2012.197
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1557/jmr.2012.197