01583nas a2200217   4500008004100000022001400041245007900055210006900134260010000203300001200303490000700315520077500322653002601097653002401123653002901147653003501176100002001211700001601231700001201247856010601259       2005                        eng d  a0272-884200aPreparation of nanocrystalline ferroelectric CaBi2Ta2O9 by the urea method0 aPreparation of nanocrystalline ferroelectric CaBi2Ta2O9 by the u  aTHE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLANDbELSEVIER SCI LTDcJAN   a773-7750 v313 a<p>A precipitate was formed when a aqueous solution of CaCl2, BiCl3, TaF5 and urea in stoichiometric ratio (total metal cations to urea ratio is 5) is heated on a water bath. This precipitate on decomposition at 600 degrees C yielded the nanocrystallites of ternary oxide CaBi2Ta2O9 (CBT) as confirmed by X-ray diffraction (XRD). Particle size and morphology was studied by transmission electron spectroscopy (TEM). Ferroelectric hysteresis loop parameters such as remnant polarization (P-r) and coercive field (E-C) were also determined. TEM investigations revealed that the average particle size of the polycrystalline powder is 70 nm. The room temperature dielectric constant was found to be 110. (c) 2004 Elsevier Ltd and Techna Group S.r.l. All rights reserved.</p>10adielectric properties10aElectron microscopy10aferroelectric properties10apowders : chemical preparation1 aGaikwad, S., P.1 aPasricha, R1 aRavi, V  uhttps://library.ncl.res.in/content/preparation-nanocrystalline-ferroelectric-cabi2ta2o9-urea-method-0