Preparation of nanocrystalline ferroelectric CaBi2Ta 2O9 by the urea method

S. P. Gaikwad, Renu Pasricha, V. Ravi

Research output: Contribution to journalArticle

Abstract

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 °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 (Pr) and coercive field (EC) 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.

Original languageEnglish (US)
Pages (from-to)773-775
Number of pages3
JournalCeramics International
Volume31
Issue number6
DOIs
StatePublished - Jun 20 2005

Fingerprint

Urea
Ferroelectric materials
Precipitates
Particle size
Transmission electron microscopy
Nanocrystallites
Electron spectroscopy
Hysteresis loops
Powders
Oxides
Cations
Permittivity
Positive ions
Metals
Polarization
Decomposition
X ray diffraction
Water
Temperature

Keywords

  • A. Powders: chemical preparation
  • B. Electron microscopy
  • C. Dielectric properties
  • C. Ferroelectric properties

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Process Chemistry and Technology
  • Surfaces, Coatings and Films
  • Materials Chemistry

Cite this

Preparation of nanocrystalline ferroelectric CaBi2Ta 2O9 by the urea method. / Gaikwad, S. P.; Pasricha, Renu; Ravi, V.

In: Ceramics International, Vol. 31, No. 6, 20.06.2005, p. 773-775.

Research output: Contribution to journalArticle

@article{b7ac32d57a8a4b61a1557bd6ccaedcb8,
title = "Preparation of nanocrystalline ferroelectric CaBi2Ta 2O9 by the urea method",
abstract = "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 °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 (Pr) and coercive field (EC) 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.",
keywords = "A. Powders: chemical preparation, B. Electron microscopy, C. Dielectric properties, C. Ferroelectric properties",
author = "Gaikwad, {S. P.} and Renu Pasricha and V. Ravi",
year = "2005",
month = "6",
day = "20",
doi = "10.1016/j.ceramint.2004.08.011",
language = "English (US)",
volume = "31",
pages = "773--775",
journal = "Ceramics International",
issn = "0272-8842",
publisher = "Elsevier Limited",
number = "6",

}

TY - JOUR

T1 - Preparation of nanocrystalline ferroelectric CaBi2Ta 2O9 by the urea method

AU - Gaikwad, S. P.

AU - Pasricha, Renu

AU - Ravi, V.

PY - 2005/6/20

Y1 - 2005/6/20

N2 - 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 °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 (Pr) and coercive field (EC) 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.

AB - 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 °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 (Pr) and coercive field (EC) 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.

KW - A. Powders: chemical preparation

KW - B. Electron microscopy

KW - C. Dielectric properties

KW - C. Ferroelectric properties

UR - http://www.scopus.com/inward/record.url?scp=20344383765&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=20344383765&partnerID=8YFLogxK

U2 - 10.1016/j.ceramint.2004.08.011

DO - 10.1016/j.ceramint.2004.08.011

M3 - Article

AN - SCOPUS:20344383765

VL - 31

SP - 773

EP - 775

JO - Ceramics International

JF - Ceramics International

SN - 0272-8842

IS - 6

ER -