4.7 Article

Water uptake analysis of acceptor-doped lanthanum orthoniobates

Journal

JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
Volume 138, Issue 1, Pages 225-232

Publisher

SPRINGER
DOI: 10.1007/s10973-019-08208-6

Keywords

Proton conductors; Thermogravimetry; Water uptake; Hydration

Funding

  1. Ministry of Science and Higher Education, Poland [IP2015 051374]
  2. National Science Centre, Poland [2015/17/N/ST5/02813]
  3. Royal Society [UF100105, UF150693]
  4. EPSRC [EP/M013839/1, EP/M028291/1]
  5. EPSRC [EP/M028291/1] Funding Source: UKRI

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In this work, lanthanum orthoniobates doped with either antimony, calcium, or both have been synthesized and studied. The water uptake of the investigated materials has been analyzed by means of thermogravimetric studies. The results show the difference between the thermodynamics of hydration between the lanthanum orthoniobate system and other proton conducting ceramics. The relation between the water uptake and effective acceptor doping for the investigated system has been found, and the energetics of the water uptake relation are discussed.

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