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XIU FANG WANG1,* , YU WANG2
The ceramic samples were prepared using the standard ceramic method and sintered in air at 1300 °C for 2 h. The fabricated samples were subjected to subsequent heat treatment in different atmospheres to study the physical origin of the nonlinear electrical properties. Hea t treatment in a reducing atmosphere decreases the nonlinear electrical properties of the samples. However, repeating the heat treatment in an oxidizing atmosphere can recover the electrical properties to nearly its original value. It is proposed that the adsorbed oxygen on grain surfaces plays a key role in governing the varistor properties. The physical origin is an intrinsic characteristic of pure terbium oxide ceramics, which is different from that of the varistors reported previously. The change of the electrical properties can be attributed to the variation in the amount of adsorbed oxygen on the grain surfaces..
Varistor, Terbium oxide, Heat treatment, Oxygen adsorption.
XIU FANG WANG, YU WANG, Origin of the v aristor properties of terbium oxide c eramics, Optoelectronics and Advanced Materials - Rapid Communications, 7, 5-6, May-June 2013, pp.430-433 (2013).
Submitted at: Oct. 1, 2012
Accepted at: June 12, 2013
Optoelectronics and Advanced Materials - Rapid Communications
(2022): 0.5 - 2022 Journal Citation Reports (Clarivate Analytics, 2023)
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