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Effects of Strontium, Barium and Tin Doping on Electrical Properties of Calcium Titanate Ceramics for Capacitor Applications

https://meral.edu.mm/records/9442
b7d2c070-3550-4c28-a39b-9477be2ce96f
69d5ae18-9bec-4b8a-b179-83676b365760
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May May Kalayar Kyaing (299 to 308).pdf (661 KB)
Publication type
Journal article
Upload type
Publication
Title
Title Effects of Strontium, Barium and Tin Doping on Electrical Properties of Calcium Titanate Ceramics for Capacitor Applications
Language en
Publication date 2022-12-31
Authors
May Kalayar Kyaing
Amy Aung
Ohnmar Swe
Shwe Sin Oo
Description
Abstract
Strontium doped calcium titanate (Ca0.9Sr0.1TiO3), barium doped calcium titanate (Ca0.9Ba0.1TiO3) and tin doped calcium titanate (CaSn0.1Ti0.9O3) ceramics were synthesized using a conventional solid-state reaction method. The aim of this paper is to investigate the effects of Sr, Ba and Sn on the crystal structures, surface morphologies and dielectric properties of CaTiO3 ceramics. The crystallographic phases of the ceramics were identified by X-ray diffractometer (XRD) and confirmed that all the ceramics were crystallized into orthorhombic perovskite phase. The surface morphologies and average grain sizes of the ceramics were determined using scanning electron microscopy (SEM) and verified that the crystallite particles were agglomerated form. The average grain sizes were found to be ranging from 0.383 μm to 0.436 μm. The capacitance-voltage (C-V) measurements were performed at the frequency range from 1 kHz to 1000 kHz using a LCR meter. The highest dielectric constant was occurred in the CaSn0.1Ti0.9O3 ceramic at the frequency range of 1 kHz. The dielectric constant is an important parameter of a dielectric material for the technological application of energy and data storage. From 1/C2 versus V graph, the effective dopant concentrations of the ceramics were also evaluated. The effective dopant concentrations of the ceramics were changed with the different doping materials and the maximum value was observed in the CaSn0.1Ti0.9O3 ceramic.
Keywords
Doped CaTiO3 ceramics, LCR meter, dielectric constant, effective dopant concentration Introduction
Journal articles
2022
University of Yangon Research Journal 2022
299-308
Vol. 11, No.2
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