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Proceedings of the 7th National Conference on Functional Materials and Applications (FMA 2010 E-BOOK)

Changsha,China,10.16-10.18,2010

ISBN: 978-1-935068-41-9 Scientific Research Publishing, USA

E-Book 2313pp Pub. Date: October 2010

Category: Chemistry & Materials Science

Price: $360

Title: Electromotive Force of H2O and H2 Concentration Cell Using High-Temperature Proton-Conducting Ceramics CaZr0.9In0.1O3-δ
Source: Proceedings of the 7th National Conference on Functional Materials and Applications (FMA 2010 E-BOOK) (pp 2111-2114)
Author(s): Jian-bo Meng, China Academy of Engineering and Physics, P.O.Box 919-71, 621900, Sichuan Mianyang, P.R.China
Da-qiao Meng, China Academy of Engineering and Physics, P.O.Box 919-71, 621900, Sichuan Mianyang, P.R.China
Wen-hua Luo, China Academy of Engineering and Physics, P.O.Box 919-71, 621900, Sichuan Mianyang, P.R.China
Ge Sang, China Academy of Engineering and Physics, P.O.Box 919-71, 621900, Sichuan Mianyang, P.R.China
Abstract: Proton -conducting CaZr0.9In0.1O3-δ ceramic was prepared by optimized high-temperature solid state reaction method. Using the ceramic as solid electrolyte, the measurements of EMFs and ionic transport numbers on CaZr0.9In0.1O3-δ ceramic were performed by using ac impedence spectroscopy and gas concentration cell methods in the temperature range of 600~1000℃ in the different partial pressures of water vapour and hydrogen , respectively. The results indicate that the sample is a mixed conductor of proton， oxide-vacancy and hole in water vapour and Ar atmosphere. In water and Ar atmosphere, the protonic transport number is a little quantity obout 0.478~0.692. and the sample is a pure protonic conductor. In H2 and Ar atmosphere, the protonic transport number is almost unity and the sample is a pure protonic conductor at about 600℃. The sample is a mixed conductor of proton and electron in H2 and Ar atmosphere.
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