Characterization of Ba0.77Sr0.23TiO3 powder prepared from an oxalate co-precipitation and an impregnation method

• Main Authors: Pookmanee P., Phanichphant S.
• Format: Article
• Language: English
• Published: 2014
• Online Access: http://www.scopus.com/inward/record.url?eid=2-s2.0-77958197299&partnerID=40&md5=e1079ec88af464f76f9922e694344539; http://cmuir.cmu.ac.th/handle/6653943832/6191
• Institution: Chiang Mai University

Barium titanate (BaTiO3) powder was prepared from an oxalate co-precipitation method with the starting precursors of barium chloride dihydrate and potassium titanium oxalate dihydrate with mole ratio of 1: 1. Precipitated powder was obtained after adding oxalic acid until the pH of the final solution was 2. The precipitated powder was milled and calcined at 700°C for 2 h. Sr-doped barium titanate (BaSrTiO3) powder was prepared by an impregnation method. Barium titanate calcined at 700 oC for 2 h was mixed with 2 and 4 mole % of Sr from strontium chloride hexahydrate. The mixed powder was calcined at 900°C for 2 h. The phase of Ba0.77Sr0.23TiO3 powder was studied by X-ray diffraction (XRD) and found to have a tetragonal structure after calcination at 900°C for 2 h. The morphology and chemical composition of Ba0.77Sr0.23TiO3 powder were investigated by a scanning electron microscope (SEM) and energy dispersive X-ray spectroscopy (EDS). The particle size of Ba0.77Sr0.23TiO3 powder was in the range of 0.2-0.3 μm with an irregular shape. The elemental composition of barium, strontium, titanium and oxygen showed the characteristic X-ray energy values.