KENBIKYO
Online ISSN : 2434-2386
Print ISSN : 1349-0958
Feature Articles: Towards a thorough Investigation of Material Science by Electron Holography
Observation of Inner Potential Distribution at Interfaces between Metal and Oxide Ion-Conductor
Takayoshi Tanji
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2010 Volume 45 Issue 3 Pages 152-155

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Abstract

Electrostatic inner-potentials near the interfaces between Pt and oxide ion-conductor are measured by electron holography. The band bending inferred from the inner-potential distribution inside the proton conductor Strontium-Zirconium Oxide (SZO) supports the experimental result that the composite materials of Pt more than 1.5vol% in SZO show extremely low conductivity. Inner-potentials are also measured with applying external electric field to the model of fuel cell Pt/Gadolinium-doped Ceria (GDC)/Pt. In the result, an inhomogeneous distribution of Oxygen anions and ionic vacancies are detected in the condition no oxygen anions reserved. A new specimen holder has been developed so that specimen is applied external potential at high temperature.

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© 2010 The Japanese Society of Microscopy
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