Electrical Resistance and Seebeck Effect in Undoped Polycrystalline Zinc Oxide

Abstract:

Thermoelectric properties of metal oxide semiconductors are of increasing interest in the field of sensors design and fabrication. The oxide components in the majority of such applications are polycrystalline in which the charge transportation is controlled both by the microstructure and the bulk properties of the material. While the dependence of the electrical resistivity on the microstructural and compositional changes in these materials is well understood, the complications encountered with their thermoelectric properties, have remained unattended. Here, we report experimental data on the Seebeck coefficient of undoped polycrystalline zinc oxide measured on the ceramic pellets fabricated by dry pressing of the powder and sintering at 800 and 1000°C, in air. Aluminum ohmic contacts are used for electrical connections. Seebeck voltage and electrical resistivity are measured at various temperatures and different atmospheric condition at the presence of predetermined temperature gradients.

• Periodical: Key Engineering Materials (Volume 605)
• Pages: 185-188
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.605.185
• Online since: April 2014
• Authors: Faramarz Hossein-Babaei*, S. Masoumi
• Keywords: Oxide Semiconductors, Resistivity, Seebeck Effect, Temperature Dependence, Zinc Oxide

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