ISSN:
1013-9826
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
B2O3 doped ZnO-Bi2O3-Sb2O3-based varistors were fabricated by conventional solid statereaction method. The structure and electrical properties were investigated by XRD, SEM and electricalmeasurements. The grain size obviously increases with increasing B2O3 content, while the content ofZn7Sb2O12 spinel on the grain boundaries gradually decreases, which implies that B2O3 doping inhibits thegrowth of Zn7Sb2O12 spinel. The density (ρ) of ZnO varistors increases with increasing B2O3 content (x)and reaches the maximum at x = 0.4 mol%. The sample with x ≈ 0.6 mol% sintered at 1150 °C exhibits thebest performance, with nonlinear coefficient of 48 and leakage current of 4 μA
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/56/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.368-372.497.pdf