Studying the effect of Strontium Titanate on the Dielectric Constant of  the Barium Titanate

	Studying the effect of Strontium Titanate on the Dielectric Constant of the Barium Titanate
journal of al-qadisiyah for pure science(quarterly)
Article 1, Volume 16, Issue 2, 2016, Pages 169-176 PDF (0 K)
Abstract
In this study, the effect of adding strontium titanate (SrTiO3) on the dielectric constant of the barium titanate (BaTiO3) was investigated. For this purpose, the BaTiO3 powder was first prepared by mixing barium carbonate (BaCO3) with titanium dioxide (TiO2) and sintering by vacuum furnace at 1200 ºC under Argon. Then, the SrTiO3 powder was prepared by mixing strontium carbonate (SrCO3) with titanium dioxide (TiO2) and sintering at 1150 ºC. Different weight percentages (5-50 %) of SrTiO3 were added into the BaTiO3 and mixed for 72 hour to prepare different mixtures of (BaSr)TiO3 for electrical insulators. All samples of (BaSr)TiO3 insulators were compacted and sintered at 5 tons and 1350 ºC, respectively. The crystalline structural characterizations of the prepared powders as well as the (BaSr)TiO3 mixtures were analyzed by the X-ray diffraction (XRD). Values of the dielectric contacts and the bulk density for all prepared mixtures were measured. The results showed that the electrical insulators made from the mixture of 30 % SrTiO3 and 70 % BaTiO3 revealed the highest electric constant with a reasonable density.
Keywords
Barium titanate; strontium titanate; electrical insulators; dielectric constant; and ferroelectric materials

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