Characterization of zinc oxide-based varistor ceramics prepared using solid state route and co-precipitation processing

• Main Author: Mohd Sabri Mohd Ghazali
• Format: Thesis
• Language: English
• Published: Selangor: Universiti Putra Malaysia 2014
• Subjects: HD 9660 .Z53 M6 2013; Mohd Sabri Mohd Ghazali; Tesis Universiti Putra Malaysia 2013; Oxides; Zinc oxide
• Online Access: http://dspace.psnz.umt.edu.my/xmlui/handle/123456789/3046

There were few reports of fabrication of varistor ceramics that used as a protective device for electrical equipments from transient voltage surges. using other method than conventional solid-state. Hence, it is useful to characterize in terms of morphology, electrical non-linearity characteristics, and optical properties of it prepared by using co-precipitation processing, as this produces fine and homogenous powder, as well as conventional solid-state route. The objectives of the study are; to prepare four systems of' ZnO based varistor ceramics through conventional solid-state route and co-precipitation technique to determine which factors affect most on electrical non-linearity behavior: secondly to carry out optical study of four systems of ZnO based varistor ceramics obtain from conventional solid-state route and co-precipitation technique to elucidate the structure arrangement; and thirdly to investigate the degradation behavior of one system of ZnO based varistor ceramics (ZnO-Bi203-Ti02) to ascertain which preparation technique produce most stable electrical non-linearity coefficient.