Effect of Coprecipitation Parameters on Powder Characteristics and on Densification of PZT Ceramics.

Abstract

Effects of coprecipitation parameters on agglomerate size distribution and XRD crystallinity of PZT (53:47) powders obtained from butoxide precursors, were studied. Parameters found to significantly affect the coprecipitation process included: dilution, pH and coprecipitation rate (controlled by H2O added to cause exothermic hydrolysis of the butoxides). Effects of rinsing the precipitates with different concentrations of isopropanol/water solutions were also investigated. Results showed that relative agglomerate size distributions developed during coprecipitation persisted throughout subsequent processing. Sintered densities and microstructures were correlated to the agglomerate size distributions. Most compact and uniform microstructure were obtained with uniform (and smaller) agglomerate distributions and 60/40 isopropanol/water rinsing. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Sep 01, 1982
Accession Number
ADA124041

Entities

People

  • J. Boy
  • R. C. Buchanan

Organizations

  • University of Illinois Urbana–Champaign

Tags

Communities of Interest

  • Advanced Electronics

DTIC Thesaurus Topics

  • Agglomerates (Rock)
  • Chemistry
  • Decomposition
  • Dilution
  • Dispersions
  • Electrical Properties
  • Exothermic Reactions
  • Hydrolysis
  • Hydroxides
  • Lead Titanates
  • Liquids
  • Low Temperature
  • Microstructure
  • Particle Size
  • Particles
  • Precipitates
  • Precursors

Fields of Study

  • Environmental science

Readers

  • Analytical Chemistry
  • Materials Science and Engineering.
  • Powder metallurgy of Titanium alloys.