Simultaneous measurement of electrical conductivity and the amount of adsorbed oxygen in porous ZnO.

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概要

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• Changes in electrical conductivity and the amount of adsorbed oxygen in porous ZnO were measured simultaneously in the temperature range of 200–600 °C. The saturated amount of adsorbed oxygen increased initially, went through a maximum at 500 °C, and then decreased with increasing temperature. The conductivity decreased exponentially with increase in the amount of adsorbed oxygen, which indicates that the energy barrier formed due to the chemisorbed oxygen controls the total conductivity. In a high temperature region, not only the chemisorbed oxygen, but also the oxygen diffused into the grain boundaries played important roles in changing the electrical conductivity. The diffused oxygen was examined by means of a depth profile of tracer <SUP>18</SUP>O measured by SIMS. The formation of the energy barrier at the grain boundary was confirmed by current-voltage characteristic measurements.

• 公益社団法人 日本化学会の論文

著者

• Toyoda Hiroshi

  Department Of Nuclear Medicine And Diagnostic Imaging Graduate School Of Medicine Kyoto University

• YANAGIDA Hiroaki

  Research Center for Advanced Science and Technology, The University of Tokyo

• Fujitsu Satoru

  Department Of Materials Science And Ceramic Technology Shonan Institute Of Technology

• Koumoto Kunihito

  Department Of Applied Chemistry Graduate School Of Engineering Nagoya University

• Chikazawa Masatoshi

  Department Of Applied Chemistry Graduate School Of Engineering Tokyo Metropolitan University

• KOUMOTO Kunihito

  Department of Industrial Chemistry, Faculty of Engineering, University of Tokyo

• Kanazawa Takafumi

  Department of Industrial Chemistry, Faculty of Technology, Tokyo Metropolitan University

• Yanagida Hiroaki

  Research Center for Advanced Science and Technology, University of Tokyo

• Chikazawa Masatoshi

  Department of Industrial Chemistry,Faculty of Technology, Tokyo Metropolitan University

• Toyoda Hiroshi

  Department of Industrial Chemistry, Faculty of Engineering, University of Tokyo

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