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A Comparative Study of Thermal Conductivity in ZnO- and SnO2-Based Varistor Systems

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We performed a comparative study of electrical and thermal properties of ZnO- and SnO2-based varistor. The electrical properties of commercial ZnO-based varistor are equivalent to that found in SnO2-based varistor system. In spite of this, the SnO2 showed a thermal conductivity higher than commercial samples of ZnO-based varistor, which allied with its simpler microstructure and lower dopant concentration is a remarkable result that point out to the use of this system to compete commercially with ZnO-based varistor devices.
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Document Type: Research Article

Affiliations: 1: Instituto de Química, Universidade Estadual Paulista, 14801-907 Araraquara, SP, Brazil 2: Interdisciplinary Laboratory of Electrochemistry and Ceramics, Departmento de Química, Universidade Federal de São Carlos, 13565-905 São Carlos, SP, Brazil

Publication date: 01 September 2005

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