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The High‐Temperature Proton Conductor Strontium Zirconate: Thermogravimetry of Water Uptake
Author(s) -
Krug Frank,
Schober Tilman
Publication year - 1997
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1997.tb02902.x
Subject(s) - thermogravimetry , strontium , zirconate , analytical chemistry (journal) , proton conductor , materials science , water vapor , proton , dopant , chemistry , doping , mineralogy , ceramic , inorganic chemistry , composite material , chromatography , physics , organic chemistry , electrode , quantum mechanics , electrolyte , titanate , optoelectronics
The water uptake of nominally 5%‐Yb‐doped strontium zirconate (SrZr 0.95 Yb 0.05 O 3−α ) was studied in situ by thermogravimetry at different temperatures and water vapor pressures. The process could be described in terms of an ideal solution behavior, showing a lower effective vacancy concentration than that expected from the nominal dopant content. The solution reaction was found to have ΔS°=−127 J/(mol·K) and ΔH°=−106 kJ/mol.