Zinc oxide varistors are semiconductor ceramics which have excellent nonlinear electrical properties due to the grain boundaries and their microstructures. Theoretically, finer granules with a narrower size distribution give better electrical properties. Electrical properties depend on size and morphology of granules. In this research, different grading distributions of granules were sintered and the effect of granule grading distribution was investigated on ZnO varistors. The results show that application of a suitable grading distribution for production of varistors leads to the improvement of pressing, increase of varistor density and consequently it leads to better electrical properties such as decrease of leakage current in varistor by 75%.
Fahimeh abedsaeedi1, Ehsan Kousha2
1- Barghgir Toos Company
2- Barghgir Toos Company
1- This email address is being protected from spambots. You need JavaScript enabled to view it.
2- This email address is being protected from spambots. You need JavaScript enabled to view it.
Representative name: Fahimeh abed saeedi