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Title: Post-sinter annealing of Pb0.7La0.2TiO3 derived from mechanical activation
Authors: Soon, H.P. 
Xue, J.M. 
Wang, J. 
Keywords: Dielectric behaviors
Lanthanum-doped lead titanate
Oxygen vacancies
Pb0.7La0.2TiO 3
Post-sinter annealing
Space charge polarization
Issue Date: 2004
Citation: Soon, H.P., Xue, J.M., Wang, J. (2004). Post-sinter annealing of Pb0.7La0.2TiO3 derived from mechanical activation. Integrated Ferroelectrics 62 : 35-41. ScholarBank@NUS Repository.
Abstract: To investigate the relationships between the dielectric behaviors and defect structures in Pb0.7La0.2TiO3, such as A-site vacancies and oxygen vacancies, post-sinter annealing in oxygen and nitrogen were conducted. Upon initial annealing in oxygen, space charge polarization, manifesting with A-site vacancies created by PbO evaporation from the surface region, dominates the dielectric properties of Pb 0.7La0.2TiO3. Prolonged annealing in oxygen, for example, for more than 4 hours, led to a steady fall in both dielectric constant and dielectric loss. Annealing in nitrogen resulted in a similar rise in the dielectric properties at the initial stage, followed by a slow down in the increase rate at extended duration of annealing, when the perovskite structure is destabilized in combination with the interactions between oxygen vacancies and A-sitc vacancies.
Source Title: Integrated Ferroelectrics
ISSN: 10584587
DOI: 10.1080/10584580490460358
Appears in Collections:Staff Publications

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