Preparation of nanocrystalline ferroelectric CaBi2Ta 2O9 by citrate gel method

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

doi:10.1016/j.mseb.2004.11.006

Preparation of nanocrystalline ferroelectric CaBi₂Ta ₂O₉ by citrate gel method

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

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Abstract

A gel was formed when an aqueous solution of CaCl₂, BiCl ₃, TaF₅ and citric acid in stoichiometric ratio is heated on a water bath. This gel on decomposition at 600°C yielded the nano-crystallites of ternary oxide, CaBi₂Ta₂O₉ (CBT) as confirmed by X-ray diffraction study (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) are also determined. TEM investigations revealed that the average particle size of the polycrystalline powder is 40 nm. The room temperature dielectric constant was found to be 90.

Original language	English (US)
Pages (from-to)	159-161
Number of pages	3
Journal	Materials Science and Engineering B: Solid-State Materials for Advanced Technology
Volume	117
Issue number	2
DOIs	https://doi.org/10.1016/j.mseb.2004.11.006
State	Published - Mar 15 2005

Keywords

Bismuth
Diffraction
Electron microscopy

ASJC Scopus subject areas

General Materials Science
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

Access to Document

10.1016/j.mseb.2004.11.006

Cite this

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title = "Preparation of nanocrystalline ferroelectric CaBi2Ta 2O9 by citrate gel method",

abstract = "A gel was formed when an aqueous solution of CaCl2, BiCl 3, TaF5 and citric acid in stoichiometric ratio is heated on a water bath. This gel on decomposition at 600°C yielded the nano-crystallites of ternary oxide, CaBi2Ta2O9 (CBT) as confirmed by X-ray diffraction study (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 (EC) are also determined. TEM investigations revealed that the average particle size of the polycrystalline powder is 40 nm. The room temperature dielectric constant was found to be 90.",

keywords = "Bismuth, Diffraction, Electron microscopy",

author = "Gaikwad, {S. P.} and Renu Pasricha and V. Ravi",

note = "Funding Information: One of the authors (V. Ravi) acknowledges DST Government of India (grant no. SP/S1/ H-19/2000) for financial assistance.",

year = "2005",

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doi = "10.1016/j.mseb.2004.11.006",

language = "English (US)",

volume = "117",

pages = "159--161",

journal = "Materials Science and Engineering B: Solid-State Materials for Advanced Technology",

issn = "0921-5107",

publisher = "Elsevier Ltd",

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TY - JOUR

T1 - Preparation of nanocrystalline ferroelectric CaBi2Ta 2O9 by citrate gel method

AU - Gaikwad, S. P.

AU - Pasricha, Renu

AU - Ravi, V.

N1 - Funding Information: One of the authors (V. Ravi) acknowledges DST Government of India (grant no. SP/S1/ H-19/2000) for financial assistance.

PY - 2005/3/15

Y1 - 2005/3/15

N2 - A gel was formed when an aqueous solution of CaCl2, BiCl 3, TaF5 and citric acid in stoichiometric ratio is heated on a water bath. This gel on decomposition at 600°C yielded the nano-crystallites of ternary oxide, CaBi2Ta2O9 (CBT) as confirmed by X-ray diffraction study (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 (EC) are also determined. TEM investigations revealed that the average particle size of the polycrystalline powder is 40 nm. The room temperature dielectric constant was found to be 90.

AB - A gel was formed when an aqueous solution of CaCl2, BiCl 3, TaF5 and citric acid in stoichiometric ratio is heated on a water bath. This gel on decomposition at 600°C yielded the nano-crystallites of ternary oxide, CaBi2Ta2O9 (CBT) as confirmed by X-ray diffraction study (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 (EC) are also determined. TEM investigations revealed that the average particle size of the polycrystalline powder is 40 nm. The room temperature dielectric constant was found to be 90.

KW - Bismuth

KW - Diffraction

KW - Electron microscopy

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JO - Materials Science and Engineering B: Solid-State Materials for Advanced Technology

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