Abstract
Synthesis of BST (Ba0.5Sr0.5TiO3) spherical particles by polymer templating method was investigated. N-Vinylpyrrolidone-co-styrene polymer was used for polymer templates. Macromolecular metal-complex of Ba, Sr and Ti was selected as BST precursor. BST precursor was introduced to the polymer templates by an ultrasonic mixing technique. Templates filled with BST precursor were heated at 600, 700, 800, and 900°C in the air. Crystalline phase, particle size and morphology of BST particles were characterized by FE-SEM and XRD. FE-SEM and XRD analysis showed the formation of spherical particles composed of Ba0.5Sr0.5TiO3 crystalline in cubic phase. When BST precursor was heated without templates, BST particles were irregular in shape.By using this method, spherical BST particles having lower crystallization temperature and higher homogeneity in composition were successfully synthesized in a simple process.
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