JIANG Feng ^1, YIN Li ¹, FENG Guo ^{1, 2}, LUO Tongbin ³, ZHAO Qianqian ¹, WU Qian ², LIU Jianmin ²,  ZHANG Quan ², CHENG Si ², JIANG Weihui ^{1, 2}

(1. Department of Material Science and Engineering, Jingdezhen Ceramic University, Jingdezhen 333403, Jiangxi, China; 2. National Engineering Research Center for Domestic & Building Ceramics, Jingdezhen Ceramic University, Jingdezhen 333000, Jiangxi, China; 3. Guangxi Sanhuan Enterprise Group Company, Beiliu 530007, Guangxi, China)

Abstract: Fe₂TiO₅ was synthesized by using a nonhydrolytic sol-gel (NHSG) method. Effects of titanium sources on the phase formation of Fe₂TiO₅ were studied with DTA-TG, XRD and FT-IR. It was found that the steric effect of the isopropyl group made it difficult for nucleophilic attack when Ti{OCH(CH₃)₂}₄ was used as the titanium source, thus failing to form Fe-O-Ti bonds in the gel. As a result,Fe₂TiO₅ was not available at low temperatures. When TiCl₄ or Ti(OC₄H₉)₄ was used as the titanium source, Fe-O-Ti bonds can be formed in the gel, thus ensuring the low temperature formation of Fe₂TiO₅. However, the products of TiCl₄ tended to react with oxygen donors to form a bimolecular structure, which resulted in low quality of Fe₂TiO₅. Ti(OC₄H₉)₄ is relative better titanium source. Fe₂TiO₅ was present at 600 ℃ and pure Fe₂TiO₅ could be obtained at 800 ℃ when Ti(OC₄H₉)₄ was used as titanium source.

Key words: Fe₂TiO₅; synthesis; nonhydrolytic sol-gel method; Titanium source