Please use this identifier to cite or link to this item: http://scholarbank.nus.edu.sg/handle/10635/107285
Title: Layer structured calcium bismuth titanate by mechanical activation
Authors: Sim, M.H.
Xue, J.M. 
Wang, J. 
Keywords: CaBi 4Ti 4O 15
Dielectric Properties
Mechanical Activation
Nanocrystallinity
Issue Date: 2005
Source: Sim, M.H.,Xue, J.M.,Wang, J. (2005). Layer structured calcium bismuth titanate by mechanical activation. Journal of Metastable and Nanocrystalline Materials 23 : 47-50. ScholarBank@NUS Repository.
Abstract: Nanocrystalline calcium bismuth titanate (CaBi 4Ti 4O 15), which exhibits a layer structure, has been successfully synthesized by mechanical activation of constituent oxides of CaO, Bi 2O 3 and TiO 2 in a nitrogen atmosphere at room temperature. The phase-forming calcination at elevated temperatures that is always required is skipped. CaBi 4Ti 4O 15 derived from mechanical activation consists of nanocrystallites, which occur as aggregates of ∼50 nm in sizes. It demonstrates an improved sinterability and was sintered to a density of 93.4% theoretical density at 1175°C for 2 hours. Ferroelectric properties of sintered CaBi 4Ti 4O 15 derived from mechanical activation have been studied. A peak dielectric constant of 1049 at the Curie temperature of 774°C was measured at 1MHz for CaBi 4Ti 4O 15 sintered at 1175°C.
Source Title: Journal of Metastable and Nanocrystalline Materials
URI: http://scholarbank.nus.edu.sg/handle/10635/107285
ISSN: 14226375
Appears in Collections:Staff Publications

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