The high-temperature proton conductor Ba3(Ca1.18Nb1.82)O9−gd: Thermogravimetry of the water uptake

Neutron scattering studies of the structural and dynamical properties of disordered oxides

“…The data were calibrated with the scattering of a vanadium reference sample and the hydrogen concentrations were obtained from the integrated elastic intensities for Q+O. The resulting values between c,=10 mole percent and cH=18 mole percent are consistent with the results of thermogravimetry [7].…”

Electrical conductivity and chemical stability of perovskite-type BaCe0.8-x Ti x Y0.2O3-δ

“…6). The existence of proton conduction in perovskite-type structures has been well-established in the literature [31][32][33][34][35][36][37][38][39][40][41][52][53][54][55][56][57][58][59][60][61][62][63][64]; therefore, it will not be elaborated in this work. We have investigated the chemical stability of BCTY in CO 2 .…”

“…During the heating and cooling runs, the Arrhenius plots fall on the same line, which verifies the equilibrium conductivity behavior. Several investigators have determined that the increase in electrical conductivity of acceptor-doped perovskites (e.g., ABO 3 A = Sr, Ba; B = Zr, Ce) and related ordered double perovskite-type Ba 3 CaNb 2 O 9 structures in wet atmospheres is primarily a result of proton conduction[52][53][54][55][56][57][58][59][60][61][62][63][64]. Among the samples studied, 5 mol% Ti-doped BaCe 0.75 Ti 0.05 Y 0.2 O 3-δ showed the highest electrical conductivity of 2.52×10 −3 S cm −1 at 650°C in H 2 +3% H 2 O (…”

Phase diagrams in the proton conductor systems Sr6Ta2O11×nH2O and Sr5.92Ta2.08O11.12×nH2O

“…The fitting procedure is amply illustrated in [6]. We have extracted the following values from the fit: The transition points B (n 2 , T 2 ) and A (n 1 , T 1 ) during a heating ramp at 4 different levels of humidity were accurately determined.…”