Title :
Effect of the thermal distribution for ZnO nano-powder Bi-based varistors
Author :
Wang, Min-Sung ; Oh, Sang-Hyun ; Park, Choon-Bae
Author_Institution :
Wonkwang Univ., Iksan
Abstract :
In this study, nano-varistor was fabricated with ZnO nano-powder in order to improve local overheating for Bi-based varistors. It was compared with thermal distribution characteristics of conventional varistors fabricated with ZnO micro-powder. Nano-varistor exhibited higher density than micro-varistor and low porosity. Also, nano-varistor has had minute uniform grains and few pores as compared with micro-varistor in the microstructure. Varistors took thermal images for pyrexia temperature distribution after operating varistors, respectively. ZnO nano-varistor doesn´t have exhibited local overheating and confirmed the accurate temperature gradient on the surface.
Keywords :
nanoparticles; varistors; zinc compounds; local overheating; nanopowder; nanovaristor; thermal distribution; Crystal microstructure; Electrodes; Fabrication; Grain size; Heating; Powders; Temperature distribution; Varistors; Voltage; Zinc oxide; ZnO varistor; energy capability; nano-powder;
Conference_Titel :
Nanotechnology Materials and Devices Conference, 2006. NMDC 2006. IEEE
Conference_Location :
Gyeongju
Print_ISBN :
978-1-4244-0541-1
Electronic_ISBN :
978-1-4244-0541-1
DOI :
10.1109/NMDC.2006.4388965
