Solid State Science and Technology, Vol. 16, No 1 (2008) 197-204

ISSN 0128-7389

Corresponding Author: alexsee1980@yahoo.com.sg

197

DIELECTRIC VARIATIONS OF BARIUM TITANATE ADDITIONS ON

MULLITE- KAOLINITE SAMPLE

Alex See, Jumiah Hassan, Mansor Hashim and W. Mohd. Daud Wan Yusoff

Physics Dept. Faculty of Science, Universiti Putra Malaysia,

43400 UPM, Serdang Malaysia

 

ABSTRACT

This research was designed to form better dielectric composite material using one

steady state dielectric with a good dielectric material. Distinct dielectric composites

were successfully produced using locally sourced kaolinite clay. The samples were

made using kaolinite as the base matrix and Barium Titanate (BT) added at varying

ratios. Barium Titanate was synthesized via solid-state reaction using Barium Carbonate

and rutile Titanium (IV) Oxide sintered at 1300°C. Local white kaolinite was used as

the matrix at varying weight ratios. The powders were dry-mixed and made into pellets

for calcination at 1000°C. The dielectric measurements were carried out using HP

4291B Impedance Analyzer dielectric setup. Three samples were prepared, namely

50%BT, 60%BT, and 70%BT. The dielectric measurements were carried out in an LT

furnace at temperatures 30°C - 400°C with frequencies ranging from 10 Hz to 1 MHz.

Measurements showed varying ionic relaxation for all samples.

 

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