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Barium titanate, BaTiO3 (BTO) is the most common ferro electric material, which is used to manufacture electronic components such as multilayer capacitors, positive temperature coefficient thermistors, piezo electric transdures, and ferro electric memory. Zr doped barium magnesium titanate (Ba0.9Mg1.0)(ZrxTi1-x)O3 (with x = 0.10, 0.20, 0.40 (BMZT 10, BMZT 20 and BMZT 40) perovskite is prepared by conventional solid state reaction method. The starting raw materials were BaCO3, TiO2, MgO and ZrO2. The XRD study at room temperature suggests that these have cubic and tetragonal symmetry phases. The behavior of the measured dielectric permittivity and dielectric loss with temperature and frequency reveals that the materials undergo a diffuse para-ferroelectric phase transition and are of the relaxor type. The crystal structure, surface morphology and dielectric properties of Zr and Mg doped barium titanate ceramics were investigated. Zr4+ and Mg2+ ions have entered the unit cell maintaining the perovskite structure of solid solution without the evidence of any additional phase when Mg content is 0.1 mole% and the Zr content is 0.10, 0.20 and 0.40 mole%.

advances in materials physics and chemistry

Effect of Zr on Structural and Dielectrical Properties of (Ba&amp;lt;sub&amp;gt;0.9&amp;lt;/sub&amp;gt;Mg&amp;lt;sub&amp;gt;1.0&amp;lt;/sub&amp;gt;)(Zr&amp;lt;sub&amp;gt;x&amp;lt;/sub&amp;gt;Ti&amp;lt;sub&amp;gt;1-x&amp;lt;/sub&amp;gt;)O&amp;lt;sub&amp;gt;3&amp;lt;/sub&amp;gt; Ceramics