Page 18 - IPCoSME 2021

1 INTERNATIONAL POSTGRADUATE CONFERENCE ON SCIENCE AND MARINE ENVIRONMENT 2021
st
(IPCoSME 2021)
“Environmental Sustainability Enhancement Through the Collaboration of Sciences”

RA-05

MICROSTRUCTURE AND ELECTRICAL CHARACTERISTICS OF LOW
VOLTAGE ZNO VARISTORS DOPED WITH BARIUM

TITANATE

1
MALIA ATHIRAH BINTI BADRUDDIN AND MOHD SABRI MOHD GHAZALI
1

Faculty of Science and Marine Environment, Universiti Malaysia Terengganu, 21030
1
Kuala Nerus, Terengganu, MALAYSIA

*Corresponding author email: mohdsabri@umt.edu.my

Abstract: Present study highlights the combination of zinc oxide (ZnO) with a perovskite
material in varistor ceramics due to their unique features for electrical protection devices.

Pelletized samples of polycrystalline ZnO ceramics doped with barium titanate (BaTiO3) were
prepared by a solid-state reaction method in the production of low-voltage varistors.

Microstructural investigation through scanning electron microscopy (SEM), energy dispersive
X-ray analysis spectroscopy (EDS), and X-ray diffraction (XRD) revealed the presence of ZnO

and BaTiO3 phases. These findings were correlated with the evolution of electrical

characteristics. Samples containing 12 wt.% BaTiO3 showed excellent comprehensive
electrical performances with a nonlinear coefficient (α) of 4.8, having the lowest leakage

current density of 348 μA/cm2.

Keywords: low-voltage; barium titanate; varistors; zinc oxide; electrical properties

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