Reaction mechanisms in the formation of lead zirconate titanate solid solutions under hydrothermal conditions
- Peking Univ., Beijing (China). Dept. of Chemistry
Reaction mechanisms in the formation of PZT solid solution were studied under hydrothermal conditions (Pb/(Zr + Ti) = 1.0 to 1.9, Zr/Ti = 0/10 to 10/0, 1M to 5M KOH, 100C to 220C, 2 h). A yellow tabular crystallite with tetragonal symmetry and Pb/Ti [approx] 2 was formed at 100 to 130C. A PZT crystallite was formed just above 150C. The crystallite was a mixture of Ti-rich PZT and Zr-rich PZT phases. When the temperature and KOH concentration were increased, the composition of the PZT product tended to be homogeneous. The PZT in the morphotropic phase boundary zone was formed at Zr/Ti = 5/5, 5M KOH, 220C, 2h. Neither PbTiO[sub 3] nor PbZrO[sub 3] was detected as a separate phase under the above hydrothermal conditions.
- OSTI ID:
- 6301717
- Journal Information:
- Journal of the American Ceramic Society; (United States), Journal Name: Journal of the American Ceramic Society; (United States) Vol. 76:3; ISSN 0002-7820; ISSN JACTAW
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
360202* -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
ALKALI METAL COMPOUNDS
CHEMICAL COMPOSITION
CHEMICAL REACTION KINETICS
COHERENT SCATTERING
CRYSTAL LATTICES
CRYSTAL STRUCTURE
CRYSTAL-PHASE TRANSFORMATIONS
CRYSTALLIZATION
DIFFRACTION
DISPERSIONS
ELECTRON MICROSCOPY
HYDROGEN COMPOUNDS
HYDROXIDES
KINETICS
LEAD COMPOUNDS
MICROSCOPY
MIXTURES
OXYGEN COMPOUNDS
PHASE TRANSFORMATIONS
POTASSIUM COMPOUNDS
POTASSIUM HYDROXIDES
PZT
REACTION KINETICS
SCATTERING
SOLID SOLUTIONS
SOLUTIONS
SYNTHESIS
TETRAGONAL LATTICES
TITANATES
TITANIUM COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
TRANSMISSION ELECTRON MICROSCOPY
X-RAY DIFFRACTION
ZIRCONATES
ZIRCONIUM COMPOUNDS