Structural study and proton transport of bulk nanograined Y-doped BaZrO3 oxide protonics materials

Fabrication and electrical characterization of 15% yttrium-doped barium zirconate—nitrate freeze drying method combined with vacuum heating

“…In the case of 15% yttrium-doped barium zirconate (BaZr 0.85 Y 0.15 O 3−ı ), we found that the difficulty was caused by the difference in phase relationship between the sintering temperature (1600 • C) and the synthesizing temperature (1300 • C) [21,25,35]. BaZr 0.85 Y 0.15 O 3−ı is in the single phase region at 1600 • C but it is expected to be in a two-phase region of yttrium poor barium zirconate phase and yttrium rich barium zirconate phase at 1300 • C [26,35,36]. Therefore, during sintering, cations have to diffuse mutually over long distance, which might slow the rate of grain growth.…”

“…Thus, it is needed to reduce the grain boundary density. But, as far as we know, it is quite difficult to obtain large grains of 7, 10, and 15% yttrium-doped barium zirconate by sintering at less than 1715 • C with a powder synthesized by solid state reaction method [8,14,21,25,34], although it is relatively easy to obtain well-grown and homogeneous grains of 20% yttrium-doped barium zirconate with a powder synthesized by sintering at even less than 1600 • C [18,23,26,32]. In the case of 15% yttrium-doped barium zirconate (BaZr 0.85 Y 0.15 O 3−ı ), we found that the difficulty was caused by the difference in phase relationship between the sintering temperature (1600 • C) and the synthesizing temperature (1300 • C) [21,25,35].…”

Review on nanoperovskites: materials, synthesis, and applications for proton and oxide ion conductivity

“…Cerversa et al [46] have compared the protonic conduction of nanostructured BaZr 0.8 Y 0.2 O 3 − δ and found a contradictory effect when comparing with the overall conduction for the bulk conductivity of BaZr 0.8 Y 0.2 O 3 − δ which was already reported by Kreuer [85]. Matsumoto et al [120] made an experimental observation and established a marked change in the electrical properties in the proton conductor SrZr 0.9 Y 0.1 O 3−δ by dispersing fine platinum particles.…”

Fabrication and properties of Ba(Zr1−xCex)0.9Y0.1O2.95/NaCl composite electrolyte materials

“…Many perovskite-type oxides have been reported for their high proton conductivity at temperatures ranging from 500 • C to 800 • C. Yttrium-doped perovskite BaZrO 3 (BZY) ceramics [1][2][3][4] have been widely studied for their potential applications in proton ceramic fuel cells (PCFCs) and other fields. During the past several years, the investigations of proton conductors in perovskite ceramics were mainly focused on single-phase cerates or zirconates, such as doped BaCeO 3 [5][6][7] or doped BaZrO 3 [8,9].…”