Formation mechanisms and morphological changes during the hydrothermal synthesis of BaTiO3 particles from a chemically modified, amorphous titanium (hydrous) oxide precursor

Jooho Moon, Ender Suvaci, Augusto Morrone, Stephen A. Costantino, James Hansell Adair

Research output: Contribution to journalArticle

64 Citations (Scopus)

Abstract

The formation mechanism of BaTiO3 under hydrothermal conditions was investigated. A coprecipitated precursor prepared from chemically modified titanium isopropoxide with acetylacetone and barium acetate was used as a starting material. A solid-state kinetic analysis, supported by microstructural evidence, indicates that the formation mechanism of BaTiO3 in the current material system is dissolution and precipitation. The Ba-Ti complex gel dissolves into the aqueous soluble species, followed by direct precipitation from supersaturated solution. It is proposed that crystallization is controlled by dissolution of the hydrous Ti gel at the initial stage and then possibly by dissociation of the acetylacetonate group from the Ti solution species in which the acetylacetonate group is strongly bound to Ti.

Original languageEnglish (US)
Pages (from-to)2153-2161
Number of pages9
JournalJournal of the European Ceramic Society
Volume23
Issue number12
DOIs
StatePublished - Jan 1 2003

Fingerprint

Titanium oxides
Hydrothermal synthesis
Dissolution
Gels
Barium
Crystallization
Acetates
Titanium
Kinetics
titanium dioxide
acetyl acetonate
acetylacetone
titanium isopropoxide

All Science Journal Classification (ASJC) codes

  • Ceramics and Composites
  • Materials Chemistry

Cite this

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abstract = "The formation mechanism of BaTiO3 under hydrothermal conditions was investigated. A coprecipitated precursor prepared from chemically modified titanium isopropoxide with acetylacetone and barium acetate was used as a starting material. A solid-state kinetic analysis, supported by microstructural evidence, indicates that the formation mechanism of BaTiO3 in the current material system is dissolution and precipitation. The Ba-Ti complex gel dissolves into the aqueous soluble species, followed by direct precipitation from supersaturated solution. It is proposed that crystallization is controlled by dissolution of the hydrous Ti gel at the initial stage and then possibly by dissociation of the acetylacetonate group from the Ti solution species in which the acetylacetonate group is strongly bound to Ti.",
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Formation mechanisms and morphological changes during the hydrothermal synthesis of BaTiO3 particles from a chemically modified, amorphous titanium (hydrous) oxide precursor. / Moon, Jooho; Suvaci, Ender; Morrone, Augusto; Costantino, Stephen A.; Adair, James Hansell.

In: Journal of the European Ceramic Society, Vol. 23, No. 12, 01.01.2003, p. 2153-2161.

Research output: Contribution to journalArticle

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T1 - Formation mechanisms and morphological changes during the hydrothermal synthesis of BaTiO3 particles from a chemically modified, amorphous titanium (hydrous) oxide precursor

AU - Moon, Jooho

AU - Suvaci, Ender

AU - Morrone, Augusto

AU - Costantino, Stephen A.

AU - Adair, James Hansell

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