Nanocrystalline ferroelectric phases from mechanical activation of oxide compositions

Please use this identifier to cite or link to this item: https://doi.org/10.1016/S1359-6462(01)00742-4

Title:	Nanocrystalline ferroelectric phases from mechanical activation of oxide compositions
Authors:	Lim, J. Junmin, X. Wang, J.
Keywords:	Dielectric permittivity Functional ceramics Order-disorder phenomena Powder processing Transmission electron microscopy (TEM)
Issue Date:	18-May-2001
Citation:	Lim, J., Junmin, X., Wang, J. (2001-05-18). Nanocrystalline ferroelectric phases from mechanical activation of oxide compositions. Scripta Materialia 44 (8-9) : 1803-1806. ScholarBank@NUS Repository. https://doi.org/10.1016/S1359-6462(01)00742-4
Abstract:	Successful synthesis of nanocrystalline perovskite lead scandium tantalate, PbSc0.5Ta0.5O3, was achieved via a novel one-step mechanical activation route. The as-formed PST exhibits a disordered structure and nanocrystalline domains of ∼8nm. Sintered ceramics made from these powders retain long-range disordered perovskite structure up to 1200°C and a dielectric constant of ∼23,000 is obtained. Sintering above this temperature results in the formation of undesirable pyrochlore phases that degrades dielectric properties. © 2001 Acta Materialia Inc. Published by Elsevier Science Ltd.
Source Title:	Scripta Materialia
URI:	http://scholarbank.nus.edu.sg/handle/10635/107136
ISSN:	13596462
DOI:	10.1016/S1359-6462(01)00742-4
Appears in Collections:	Staff Publications

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