In:
International Journal of Modern Physics B, World Scientific Pub Co Pte Ltd, Vol. 19, No. 15n17 ( 2005-07-10), p. 2514-2519
Abstract:
Ferroelectric nanocrystal powders of SrBi 2 Ta 2 O 9 (SBT) have been first prepared by a polymerizable complex (PC) route. The bismuth powder, strontium carbonate, and water-soluble tantalum oxalate solution were used as starting materials. Thermal analyses (TGA and DSC), x-ray diffraction (XRD), transmission electron microscopy (TEM), and conventional BET method were explored to characterize the structure, morphology, and specific surface area of PC-derived SBT powders calcined at 500-850 °C. As control samples, SBT powders were also fabricated by metalorganic decomposition (MOD) method. The XRD and TEM results indicate that high pure and well crystalline powders can be obtained at 650 °C with a average size of 50 nm. The PC-derived powder has much larger surface area than MOD-derived powder. The BET value of PC and MOD powder at 750 °C for 2h is 6.7 and 1.5m 2 /g, respectively. The specific surface area of powder prepared by conventional solid-state reaction is quite low, typically less than 1.5m 2 /g. Therefore, the feasibility of the polymerizable complex route is demonstrated in the powder synthesis of SBT with large surface area.
Type of Medium:
Online Resource
ISSN:
0217-9792
,
1793-6578
DOI:
10.1142/S0217979205031249
Language:
English
Publisher:
World Scientific Pub Co Pte Ltd
Publication Date:
2005
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