Investigations into Sr3CaZr0.5Ta1.5O8.75, a novel proton conducting perovskite oxide

Synthesis and structural characterization of perovskite type proton conducting BaZr1−xInxO3−δ (0.0≤x≤0.75)

“…In contrast, a plateau was found in the temperature range 350- 550°C. Similar behavior has also been observed under humid atmosphere for BaZr 0.3 In 0.7 O 3−δ [13], Sr 3 CaZr 0.5 Ta 1.5 O 8.75 [33] and Ba 3 Ca 1.26 Nb 1.74 O 9−δ [34]. This plateau can be a consequence of an increase in the protonic charge mobility and a simultaneous decrease in proton concentration due to a loss of water [9].…”

Proton conductivity and low temperature structure of In-doped BaZrO3

“…Hence, a non-linear Arrhenius plot is expected. Non-linear Arrhenius plots are also observed in the literature for several proton conducting systems [7,[14][15][16][17][18]. The identical conductivities of dry and pre-hydrated BaZrO 3 clearly shows that creation of vacancies by doping is necessary for incorporation of protons according to reaction (1).…”

Structural study and proton conductivity in Yb-doped BaZrO3

“…However, electronic holes can be formed in an oxidizing atmosphere [19,20]. Often an expansion of the unit cell parameter after hydration is observed [21][22][23]. This expansion is a result of filling of oxygen vacancies (V O UU ) by hydroxyl groups (OH O U ) in the presence of water vapour according to the following reaction, As suggested by Knight [24] a higher doping, which corresponds to a higher concentration of D in the structure, is required to obtain accurate refinement of deuterium positions, thermal parameters, site occupancies etc.…”