Function of glycine during solid-state reaction toward well-crystallized fine particulate barium titanate

• Published in: Journal of materials science. Materials in electronics Vol. 20; no. 9; pp. 844 - 850
• Main Authors: Ando, Chie, Tsuzuku, Koichiro, Kobayashi, Tomomi, Kishi, Hiroshi, Kuroda, Shinichi, Senna, Mamoru
• Format: Journal Article
• Language: English
• Published: Boston Springer US 01.09.2009; Springer; Springer Nature B.V
• Subjects: Applied sciences; Characterization and Evaluation of Materials; Chemistry and Materials Science; Dielectric, amorphous and glass solid devices; Electronics; Exact sciences and technology; Materials Science; Optical and Electronic Materials; Semiconductor electronics. Microelectronics. Optoelectronics. Solid state devices; Glycine; BaTiO3; Barium Titanate; BaCO3; TiO2; Particle size; Heat treatment; Solid state reaction; Thermogravimetry; Multiple layer; Titanium; Barium titanates; Ceramic capacitor; High temperature; Titanium oxide; X-ray photoelectron spectra
• ISSN: 0957-4522; 1573-482X
• DOI: 10.1007/s10854-008-9804-0

Effects of glycine added to BaCO 3 and TiO 2 mixtures were examined during a solid-state reaction toward phase pure BaTiO 3 for MLCC with the average particle size below 180 nm and the tetragonality, c/a, above 1.009. Changes in the states of glycine during heating were monitored by differential thermogravimetry and high-temperature X-ray photoelectron spectroscopy. Glycine residue persists up to around 350 °C and destabilizes Ti–O bonds in TiO 2 prior to the initiation of reaction toward BaTiO 3 . This, in turn, leads to a decrease in the reaction termination temperature due to higher mobility of Ba 2+ ions through the reaction zone.