Low temperature synthesis of lead titanate by a hydrothermal method

Joo Ho Moon, Tuo Li, Clive A. Randall, James H. Adair

Research output: Contribution to journalArticle

76 Citations (Scopus)

Abstract

Alkoxide-based hydrothermal powder synthesis of lead titanate was investigated. The objective of this work was to lower the synthesis temperature. By modifying titanium isopropoxide with acetylacetone during solution mixing, the phase-pure lead titanate with perovskite structure was synthesized at temperatures as low as 150 °C. It was determined that the pH of the hydrothermal reaction medium and the initial Pb/Ti ratio are critical factors in forming stoichiometric PbTiO3. When the pH of the initial feedstock is above 14 and the Pb/Ti ratio is greater than 1.5, a phase-pure PbTiO3 can be obtained. The modification of titanium alkoxide gave rise to the formation of a stable complex against hydrolysis and eventually reduced the synthesis temperature significantly. A possible formation mechanism for PbTiO3 is the dissolution-recrystallization from an amorphous precursor to a well-crystalline product as originally proposed by Rossetti et al. Hall-Williamson analysis was also performed on the hydrothermally derived PbTiO3 to interpret the systematic peak broadening and asymmetry for {001} reflections, unlike the commercial PbTiO3. It was observed that the strain in the c-axis direction is much higher than that in the a-axis direction while the domain sizes for both directions are similar. This strain anisotropy exerted in the particles may indicate a unique domain structure in the hydrothermally synthesized particles in which either only 180° domains exist or possibly only a single domain.

Original languageEnglish
Pages (from-to)189-197
Number of pages9
JournalJournal of Materials Research
Volume12
Issue number1
DOIs
Publication statusPublished - 1997 Jan 1

Fingerprint

Lead
alkoxides
synthesis
Titanium
titanium
acetylacetone
Powders
Perovskite
Temperature
Feedstocks
Hydrolysis
Dissolution
Anisotropy
Crystallization
Crystalline materials
temperature
hydrolysis
dissolving
asymmetry
anisotropy

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

Cite this

Moon, Joo Ho ; Li, Tuo ; Randall, Clive A. ; Adair, James H. / Low temperature synthesis of lead titanate by a hydrothermal method. In: Journal of Materials Research. 1997 ; Vol. 12, No. 1. pp. 189-197.
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Low temperature synthesis of lead titanate by a hydrothermal method. / Moon, Joo Ho; Li, Tuo; Randall, Clive A.; Adair, James H.

In: Journal of Materials Research, Vol. 12, No. 1, 01.01.1997, p. 189-197.

Research output: Contribution to journalArticle

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