A comparative study between the mixed-oxide and high-energy milling planetary method on electrical and microstructural properties for a SnO(2)-based ceramic system

作者：Aguilar Martinez J A^*; Hernandez M B; Pech Canul M I; Glot A B; Castillo Torres J

来源：Journal of Materials Processing Technology, 2009, 209(1): 318-323.

DOI：10.1016/j.jmatprotec.2008.02.001

• Tin dioxide
• Varistors
• Electrical properties
• High-energy milling
• Sintering

SnO(2) varistors doped with CO(3)O(4), Cr(2)O(3), and Sb(2)O(5) were prepared separately by two mechanical processes: mixed-oxide and high-energy milling planetary method. A comparison on the electrical and microstructural properties of the samples obtained by both methods was made. The best results on these characteristics were achieved through the milling planetary route, obtaining a nonlinear coefficient of 33 and a breakdown field of 2620Vcm(-1) at a sintering temperature of 1350 C. The samples synthesized by this last technique showed not only high density values, reaching 90.5% of the theoretical density, but they also exhibited a homogeneous microstructure, which compete with those obtained by chemical methods, with the advantage that the milling planetary method is cheaper, faster and easier than the chemical routes.

• 出版日期2009-1-1