Characterization of bismuth titanate powders

• Main Authors: Pookmanee P., Phanichphant S.
• Format: Conference or Workshop Item
• Language: English
• Published: 2014
• Online Access: http://www.scopus.com/inward/record.url?eid=2-s2.0-57649096083&partnerID=40&md5=f1e8dc83c62587b6dfbec7f1584aefed; http://cmuir.cmu.ac.th/handle/6653943832/5145
• Institution: Chiang Mai University

Bismuth titanate was prepared from the sol-gel method. Bismuth nitrate and titanium isopropoxide were used as the starting precursors with the mole ratio of Bi:Ti as 4:3. Solutions were mixed in acetic acid medium and heat at 80°C for 2h. Sols were obtained after adjusting the final of pH of solution to 2. Gels were formed after drying at 100°C for 24h. The milled powders were calcined at 500-800°C for 2h. The phase formation was investigated by X-ray diffractometry (XRD). Single phase with orthorhombic structure of bismuth titanate was obtained after calcination at 700°C for 2h. The morphology and chemical composition were studied by scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS). The average particle size was 0.50-1.5 μm with the irregular shape. The elemental composition of bismuth, titanium and oxygen showed the characteristic X-ray energy values.