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|Title:||Oxygen Migration in Dense Spark Plasma Sintered Aluminum-Doped Neodymium Silicate Apatite Electrolytes||Authors:||An, Tao
Felix Shin, J.
Slater, Peter R.
White, Timothy John
|Issue Date:||2013||Source:||An, T., Baikie, T., Herrin, J., Brink, F., Felix Shin, J., Slater, P. R., et al. (2013). Oxygen Migration in Dense Spark Plasma Sintered Aluminum-Doped Neodymium Silicate Apatite Electrolytes. Journal of the American Ceramic Society, 96(11), 3457-3462.||Series/Report no.:||Journal of the American Ceramic Society||Abstract:||Neodymium silicate apatites are promising intermediate temperature (500°C–700°C) electrolytes for solid oxide fuel cells. The introduction of Al promotes isotropic percolation of O2−, and at low levels (0.83–2.0 wt% Al) enhances bulk conductivity. To better understand the effect of Al-doping on intrinsic conductivity, and the impact of grain boundaries on the transport, dense Nd9.33+x/3AlxSi6−xO26 (0 ≤ x ≤ 2) pellets were prepared by spark plasma sintering. Phase purity of the products was established by powder X-ray diffraction and the microstructure examined by scanning electron microscopy. The ionic conductivity measured by AC impedance spectroscopy for the spark plasma sintered ceramics were compared with transport in single crystals of similar composition. Intermediate Al-doping (0.5 ≤ x ≤ 1.5) delivered superior overall conductivity for both the polycrystalline and single crystal specimens.||URI:||https://hdl.handle.net/10356/82020
|ISSN:||0002-7820||DOI:||10.1111/jace.12489||Rights:||© 2013 The American Ceramic Society. This is the author created version of a work that has been peer reviewed and accepted for publication by Journal of the American Ceramic Society, The American Ceramic Society. It incorporates referee’s comments but changes resulting from the publishing process, such as copyediting, structural formatting, may not be reflected in this document. The published version is available at: [http://dx.doi.org/10.1111/jace.12489].||Fulltext Permission:||open||Fulltext Availability:||With Fulltext|
|Appears in Collections:||ERI@N Journal Articles|
MSE Journal Articles
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