4.7 Article

Low-temperature sintering of Ba(Zr,Y)O3-based proton conducting oxides using BaO-CuO eutectic flux as sintering aid

Journal

CERAMICS INTERNATIONAL
Volume 42, Issue 8, Pages 10476-10481

Publisher

ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2016.03.038

Keywords

Sintering; Yttria-doped barium zirconate; Flux; Electrolyte; Proton-conducting fuel cell

Funding

  1. institutional research program of the Korea Institute of Science and Technology (KIST)
  2. Energy Technology Development Program of the Korea Institute of Energy Technology Evaluation and Planning (KETEP) from Ministry of Trade, Industry & Energy, Republic of Korea [20153010031940]

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The major barrier to the practical application of Ba(Zr,Y)O-3 (BZY) as an electrolyte material for proton conducting fuel cells (PCFCs) lies in its extremely inferior sintering characteristics. In this research, flux composed of 28 mol% BaO and 72 mol% CuO was employed as a novel sintering aid for BZY. Incorporation of nano-crystalline BaO-CuO flux, with a eutectic point of 890 degrees C, remarkably enhanced the sintering behavior of BZY due to the formation of a transient liquid phase, and a relative density of up to 97% of the theoretical density was obtained at 1300 degrees C with a short soaking time of 2 h. (C) 2016 Elsevier Ltd and Techna Group S.r.l. All rights reserved.

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