Nanoporous BaTiO3 Crystallites
authors Hou, RZ; Ferreira, P; Vilarinho, PM
nationality International
journal CHEMISTRY OF MATERIALS
keywords SOFT-MODE SPECTROSCOPY; X-RAY-DIFFRACTION; BARIUM-TITANATE; THIN-FILMS; PARTICLES; FERROELECTRICITY; CONSTANTS; CERAMICS; OXIDES; MERIT
abstract Morphology modification of ferroelectric materials at the nanoscale is an important aspect for further development of ferroelectrics. In this work, the synthesis of nanoporous barium titanate prepared under the assistance of Pluronic PE 10300 block copolymer is reported. Nanopores reside inside the BaTiO3 crystallites that exhibit a specific BET surface area around 70 m(2)/g and nanopore volume fraction of 44.7%. X-ray diffraction of nanoporous BaTiO3 indicates an average cubic structure while Raman spectra suggest local structural distortions of the lattice. With Landauer-Bruggeman effective medium approximation (LB-EMA), the dielectric constant (at 1 MHz) of nanoporous BaTiO3 and solid BaTiO3 (excluding all porosity) was estimated as 112 and 706, respectively, implying,in effective way to manipulate the dielectric constant of materials by introducing nanopores.
publisher AMER CHEMICAL SOC
issn 0897-4756
year published 2009
volume 21
issue 15
beginning page 3536
ending page 3541
digital object identifier (doi) 10.1021/cm803318n
web of science category Chemistry, Physical; Materials Science, Multidisciplinary
subject category Chemistry; Materials Science
unique article identifier WOS:000268523300011
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journal analysis (jcr 2019):
journal impact factor 9.567
5 year journal impact factor 10.102
category normalized journal impact factor percentile 88.386
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