Influence of CuO and ZnO additions on grain growth and proton conductivity of Y-doped BaZrO3

Abstract

The effect of CuO, ZnO, and CuO+ZnO sintering aids added to BaZr0.8Y0.2O3−δ was investigated on phase formation, microstructure, and proton conductivity with the use of the X-ray diffraction technique, scanning electron microscopy, and electrochemical impedance spectroscopy, respectively. The BaZr0.8Y0.2O3−δ pellet samples were prepared by the solid-state reaction method and sintered at 1400 °C for 10 h. The presence of a secondary phase was not detected by XRD in samples with sintering aids. The relative density of the samples without a sintering aid was 68%, while all samples with sintering achieved over 95%. SEM images revealed how the different types of sintering aids lead to the alteration of grain size, microstructure, and proton conductivity. Grain boundary conductivities were observed to improve with the addition of CuO+ZnO promoting abnormal grains such as plate-like grains and large equiaxed grains.

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References

  1. 1.

    Iwahara, H., Esaka, T., Uchida, H., Maeda, N.: Proton conduction in sintered oxides and its application to steam electrolysis for hydrogen production. Solid State Ionics. 3–4, 359–363 (1981)

    Article  Google Scholar 

  2. 2.

    Kreuer, K.D., Adams, S., Munch, W., Fuchs, A., Klock, U., Maier, J.: Proton conducting alkaline earth zirconates and titanates for high drain electrochemical applications. Solid State Ionics. 145, 295–306 (2001)

    CAS  Article  Google Scholar 

  3. 3.

    Iguchi, F., Sata, N., Tsurui, T., Yugami, H.: Microstructures and grain boundary conductivity of BaZr1−xYxO3. Solid State Ionics. 178, 691–695 (2007)

    CAS  Article  Google Scholar 

  4. 4.

    Iguchi, F., Tsurui, T., Sata, N., Nagao, Y., Yugami, H.: The relationship between chemical composition distributions and specific grain boundary conductivity in Y-doped BaZrO3 proton conductors. Solid State Ionics. 180, 563–568 (2009)

    CAS  Article  Google Scholar 

  5. 5.

    Peng, C., Melnik, J., Luo, J., Sanger, A.R., Chuang, K.T.: BaZr0.8Y0.2O3−δ electrolyte with and without ZnO sintering aid: preparation and characterization. Solid State Ionics. 181, 1372–1377 (2010)

    CAS  Article  Google Scholar 

  6. 6.

    Gao, D., Guo, R.: Structural and electrochemical properties of yttrium-doped barium zirconate by addition of CuO. J. Alloys Compd. 493, 288–293 (2010)

    CAS  Article  Google Scholar 

  7. 7.

    Yang, H., Qin, X., Zhang, J., Ma, J., Tang, D., Wang, S., Zhang, Q.: The effect of MgO and SiO2 codoping on the properties of Nd: YAG transparent ceramic. Opt. Mater. 34, 940–943 (2011)

    Article  Google Scholar 

  8. 8.

    Li, Y., Zhou, S., Lin, H., Hou, X., Li, W., Teng, H., Jia, T.: Fabrication of Nd: YAG transparent ceramics with TEOS, MgO and compound additives as sintering aids. J. Alloys Compd. 502, 225–230 (2010)

    CAS  Article  Google Scholar 

  9. 9.

    Tao, S., Irvine, J.: Conductivity studies of dense yttrium-doped BaZrO3 sintered at 1325 °C. J. Solid State Chem. 180, 3493–3503 (2007)

    CAS  Article  Google Scholar 

  10. 10.

    Pornprasertsuk, R., Kosasang, O., Somroop, K., Horprathum, M., Limnonthakul, P., Chindaudom, P., Jinawath, S.: Proton conductivity of Y-doped BaZrO3: pellets and thin films. Solid State Sci. 13, 1429–1437 (2011)

    CAS  Article  Google Scholar 

  11. 11.

    Fabbri, E., Pergolesi, D., Licoccia, S., Traversa, E.: Does the increase in Y-dopant concentration improve the proton conductivity of BaZr1−xYxO3−δ fuel cell electrolytes? Solid State Ionics. 181, 1043–1051 (2010)

    CAS  Article  Google Scholar 

  12. 12.

    Fisher, J., Kim, D., Lee, S., Nguyen, D., Lee, J.: Reactive sintering of BaY0.1Zr0.9O3-δ proton conducting ceramics with CuO liquid phase sintering aid. J. Ceram. Process. Res. 14, 703–706 (2013)

    Google Scholar 

  13. 13.

    Zhang, W., Osamura, K., Ochiai, S.: Phase diagram of the BaO-CuO binary system. J. Am. Ceram. Soc. 73, 1958–1964 (1990)

    CAS  Article  Google Scholar 

  14. 14.

    Z. Sun, E. Fabbi, L. Bi, E.T.: Lowering grain boundary resistance of improves proton conductivity for fuel cell operation. Phys. Chem. Chem. Phys. 13, 7692–7700 (2011)

  15. 15.

    Babilo, P., Haile, S.M.: Enhanced sintering of yttrium-doped barium zirconate by. J. Am. Ceram. Soc. 88, 2362–2368 (2005)

    CAS  Article  Google Scholar 

  16. 16.

    Song, H., Coble, R.L.: Origin and growth kinetics of platelike abnormal grains in liquid-phase-sintered alumina. J. Am. Ceram. Soc. 73, 2077–2085 (1990)

    CAS  Article  Google Scholar 

  17. 17.

    Dillon, S.J., Tang, M., Carter, W.C., Harmer, M.P.: Complexion: a new concept for kinetic engineering in materials science. Acta Mater. 55, 6208–6218 (2007)

    CAS  Article  Google Scholar 

  18. 18.

    Harmer, M.P.: The phase behavior of interfaces. Science. 332(80), 182–183 (2011)

    CAS  Article  Google Scholar 

  19. 19.

    Yamazaki, Y., Hernandez-Sanchez, R., Haile, S.M.: High total proton conductivity in large-grained yttrium-doped barium zirconate. Chem. Mater. 21, 2755–2762 (2009)

    CAS  Article  Google Scholar 

  20. 20.

    Bowman, W.J., Kelly, M.N., Rohrer, G.S., Hernandez, C.A., Crozier, P.A.: Enhanced ionic conductivity in electroceramics by nanoscale enrichment of grain boundaries with high solute concentration. Nanoscale. 9, 17293–17302 (2017)

    CAS  Article  Google Scholar 

  21. 21.

    Babilo, P.: Processing of yttrium-doped barium zirconate for high proton conductivity. J. Mater. Res. 22, 1322–1330 (2007)

    CAS  Article  Google Scholar 

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Acknowledgements

The authors would like to thank Asst. Prof. Dr. Thanakorn Wasanapiarnpong for supplying the cold isostatic press equipment.

Funding

This work has been financially supported by the MFU research fund (Grant No. 02201A601201), Mae Fah Luang University.

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Correspondence to Onthida Kosasang.

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Kosasang, O., Jareun, R., Phongsathit, S. et al. Influence of CuO and ZnO additions on grain growth and proton conductivity of Y-doped BaZrO3. J Aust Ceram Soc 56, 441–446 (2020). https://doi.org/10.1007/s41779-019-00347-1

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Keywords

  • Y-doped barium zirconate
  • Co-doping
  • Sintering aids
  • Abnormal grains
  • Proton conductivity