Nucleation and Formation Mechanisms of Hydrothermally Derived Barium Titanate

Jeffrey A. Kerchner, J. Moon, R. E. Chodelka, A. A. Morrone, James Hansell Adair

Research output: Contribution to journalArticle

29 Citations (Scopus)

Abstract

Barium titanate powders were produced using either an amorphous hydrous Ti gel or anatase precursor in a barium hydroxide (Ba(OH)2) solution via a hydrothermal technique in order to discern the nucleation and formation mechanisms of BaTiO3 as a function of Ti precursor characteristics. Isothermal reaction of the amorphous Ti hydrous gel and Ba(OH)2 suspension is believed to be limited by a phase boundary chemical interaction. In contrast, the proposed BaTiO3 formation mechanism from the anatase and Ba(OH)2 mixture entails a dissolution and recrystallization process. BaTiO3 crystallite nucleation, studied using high resolution transmission electron microscopy, was observed at relatively low temperatures (38°C) in the amorphous hydrous Ti gel and Ba(OH)2 mixture. Additional solution conditions required to form phase pure crystallites include a CO2-free environment, temperature >70°C and solution pH ≥13.4. Analysis of reaction kinetics at 75°C was performed using Hancock and Sharp's modification of the Johnson-Mehl-Avrami approach to compare observed microstructural evolution by transmission electron microscopy (I).

Original languageEnglish (US)
Pages (from-to)106-119
Number of pages14
JournalACS Symposium Series
Volume681
StatePublished - 1998

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Barium titanate
Nucleation
Gels
Titanium dioxide
Microstructural evolution
Phase boundaries
Barium
High resolution transmission electron microscopy
Crystallites
Reaction kinetics
Powders
Suspensions
Dissolution
Crystallization
Transmission electron microscopy
Temperature
titanium dioxide

All Science Journal Classification (ASJC) codes

  • Chemistry(all)

Cite this

Kerchner, J. A., Moon, J., Chodelka, R. E., Morrone, A. A., & Adair, J. H. (1998). Nucleation and Formation Mechanisms of Hydrothermally Derived Barium Titanate. ACS Symposium Series, 681, 106-119.
Kerchner, Jeffrey A. ; Moon, J. ; Chodelka, R. E. ; Morrone, A. A. ; Adair, James Hansell. / Nucleation and Formation Mechanisms of Hydrothermally Derived Barium Titanate. In: ACS Symposium Series. 1998 ; Vol. 681. pp. 106-119.
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Kerchner, JA, Moon, J, Chodelka, RE, Morrone, AA & Adair, JH 1998, 'Nucleation and Formation Mechanisms of Hydrothermally Derived Barium Titanate', ACS Symposium Series, vol. 681, pp. 106-119.

Nucleation and Formation Mechanisms of Hydrothermally Derived Barium Titanate. / Kerchner, Jeffrey A.; Moon, J.; Chodelka, R. E.; Morrone, A. A.; Adair, James Hansell.

In: ACS Symposium Series, Vol. 681, 1998, p. 106-119.

Research output: Contribution to journalArticle

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