Abstract
Abstract
BaF2/YSZ (yttria stabilized zirconia) bicrystals are investigated by means of impedance spectroscopy. The spectra show two semicircles in the complex impedance plane, and both arcs exhibit very similar temperature dependences. The high frequency semicircle can be attributed to the ideal (quasi one-dimensional) bulk resistance of BaF2, and the low frequency arc is caused by an additional resistance in BaF2 due to the current constriction taking place close to the contact spots at the imperfect bicrystal interface. This interpretation is supported by finite element calculations revealing that bicrystals with imperfect contacts indeed exhibit an additional semicircle in the complex impedance plane even without any ion transfer resistance between the two crystals. The low frequency arc of the BaF2/YSZ bicrystal drastically increases upon bias voltage, but relaxes to its original value after removing the bias. This phenomenon can be associated with a strong decrease of the vacancy concentration in YSZ (close to the interfacial contact spots), which is caused by F− ions being pumped into YSZ and acting as a counter dopant to Y3+.
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Bauerle JE (1969) J Phys Chem Solids 30:2657
Badwal SPS (1995) Solid State Ion 76:67
Guo X (1997) Solid State Ion 96:247
Kim S, Maier J (2004) J Eur Ceram Soc 24:1919
Balaya P, Jamnik J, Fleig J, Maier J (2006) Appl Phys Lett 88:062109
Rodewald S, Fleig J, Maier J (2001) J Am Ceram Soc 84:521
Abrantes JCC, Labrincha JA, Frade JR (2000) J Eur Ceram Soc 20:1603
Mitterdorfer A, Gauckler LJ (1998) Solid State Ion 111:185
Jorgensen MJ, Mogensen M (2001) J Electrochem Soc 148:A433
Kawada T, Suzuki J, Sase M, Kaimai A, Yashiro K, Nigara Y, Mizusaki J, Kawamura K, Yugami H (2002) J Electrochem Soc 149:E252
Brichzin V, Fleig J, Habermeier HU, Cristiani G, Maier J (2002) Solid State Ion 152–153:499
Baumann FS, Fleig J, Cristiani G, Stuhlhofer B, Habermeier HU, Maier J (2007) J Electrochem Soc 154:B931
Baumann FS, Fleig J, Habermeier HU, Maier J (2006) Solid State Ion 177:1071
Fleig J, Maier J (1997) J Electrochem Soc 144:L302
Fleig J, Maier J (1996) Electrochim Acta 41:1003
Fleig J, Pham P, Sztulzaft P, Maier J (1998) Solid State Ion 113–115:739
Hwang JH, Kirkpatrick KS, Mason TO, Garboczi EJ (1997) Solid State Ion 98:93
Fleig J, Maier J (1999) J Am Ceram Soc 82:3485
Fleig J (2004) J Electroceramics 13:637
Bollmann W (1973) Phys Stat Solid (a) 18:313
Figueroa DR, Chadwick AV, Strange JH (1978) J Phys C Solid State Phys 11:55
Fleig J (2002) Solid State Ion 150:181
Gerstl M, Schintlmeister A, Hutter H, Fleig J (in preparation)
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Gerstl, M., Fleig, J. The impedance caused by interfacial current constriction: a case study on BaF2/YSZ bicrystals. Monatsh Chem 140, 1129–1135 (2009). https://doi.org/10.1007/s00706-009-0123-9
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DOI: https://doi.org/10.1007/s00706-009-0123-9