Preparation, Stability and Thermodynamic Properties of Nd‐ and Lu‐Doped BaCeO₃ Proton‐Conducting Ceramics

Thermodynamic Properties and Stability of In‐Doped SrCeO3 Proton‐Conducting Ceramics

“…The principal scheme is based on the dissolution of strontium cerate doped with indium as well as mixtures of strontium, cerium, and indium chlorides (SrCl 2 + 0.5CeCl 3 Previously, we used the expensive technique from the Karlsruhe Research Center that enables one to prepare different complex oxides of high quality. [2,6] The phase purity and identity of SrCe 0.5 In 0.5 O 2.75 were confirmed by X-ray powder diffraction. We also performed analysis of samples with a sequential X-ray fluorescence spectrometer.…”

“…[6] for barium cerates doped with rareearth elements. The principal scheme is based on the dissolution of strontium cerate doped with indium as well as mixtures of strontium, cerium, and indium chlorides (SrCl 2 + 0.5CeCl 3 Previously, we used the expensive technique from the Karlsruhe Research Center that enables one to prepare different complex oxides of high quality.…”

“…Detailed descriptions of the construction and the procedures for performing experiments and checking the calorimeter are presented in refs. [6,[14][15] The computer controller for the platinum thermometer and the Matlab program were written at our laboratory. The program allows one to measure and [17] and 17.47 Ϯ 0.07 kJ mol -1 in ref.…”

“…Detailed procedures of the preparation of analogous compounds were described in our earlier papers. [2,6] Anhydrous SrCl 2 was prepared by drying SrCl 2 (CERAC, TM incorporated, USA, 99.9 %) in argon at about 500 K. CeCl 3 was also purchased from CERAC (mass fraction is more then 0.999) and purified by vacuum sublimation in order to remove the lanthanide oxychloride impurities. For this purpose, CeCl 3 was sublimed above the melting temperature (1143 K) in a vacuum better than 10 -5 Pa. InCl 3 was synthesized from Cl 2 and In.…”

“…Furthermore, the This work forms part of the investigations performed by authors on barium and strontium cerates and is devoted to a thermodynamic study of SrIn 0.5 Ce 0.5 O 3-d . In an earlier paper, [5][6] we reported studies on barium cerates doped with rare-earth elements. However, as we reported, the dopant solubility limit is less than 20 % of the available B sites (ABO 3 structure), and therefore, the possibility of introducing protonic defects into the matrix is also limited.…”