Sol-Gel Preparation of BaTi4O9 and Ba2Ti9O20

• Published in: Journal of the American Ceramic Society Vol. 84; no. 3; pp. 669 - 671
• Main Authors: Xu, Yebin, Chen, Xiang Ming, Wang, Liangbin
• Format: Journal Article
• Language: English
• Published: Westerville, Ohio American Ceramics Society 01.03.2001; Blackwell
• Subjects: Applied sciences; barium titanate; Building materials. Ceramics. Glasses; Ceramic industries; Chemical industry and chemicals; Chemistry; Electrotechnical and electronic ceramics; Elements and non-metal compounds (oxides, hydroxides, hydrides, sulfides, carbides, ...); Exact sciences and technology; Inorganic chemistry and origins of life; phase transformations; Preparations and properties; sol-gel; Technical ceramics; Ternary compound; Barium Oxides; Sol gel process; Chemical preparation; Barium Titanates; Chelating agent; Manufacturing; EDTA; Experimental study; Oxide ceramics; Electroceramics; Titanium Oxides
• ISSN: 0002-7820; 1551-2916
• DOI: 10.1111/j.1151-2916.2001.tb00723.x

BaTi4O9 and Ba2Ti9O20 precursors were prepared via a sol–gel method, using ethylenediaminetetraacetic acid as a chelating agent. The sol–gel precursors were heated at 700°–1200°C in air, and X‐ray diffractometry (XRD) was used to determine the phase transformations as a function of temperature. Single‐phase BaTi4O9 could not be obtained, even after heating the precursors at 1200°C for 2 h, whereas single‐phase Ba2Ti9O20 (as determined via XRD) was obtained at 1200°C for 2 h. Details of the synthesis and characterization of the resultant products have been given.