Fabrication of transparent lead lanthanum zirconate titanate ceramics from fine powders by two-stage sintering
- College of Engineering, Nihon Univ., Koriyama, Fukushima 963 (Japan)
This paper reports that transparent lead lanthanum zirconate titanate (PLZT) ceramics were fabricated from fine powders using an inexpensive two-stage sintering technique. The powders were prepared by hydrolysis from low-cost inorganic precursors. In the two-stage sintering method, uniaxially pressed green pelets were densified to nearly theoretical values in an oxygen gas atmosphere during the first-stage sintering, at 1000[degrees]C for 1 h, and then residual, free lead oxide in the pellets was removed by second-stage sintering at 1100[degrees]C for 12 h. Transparent ceramic with an average grain size of 1.6 [mu]m and a porosity of 1.3% was obtained. The transparency and dielectric characteristics of the present samples were compared with those of hot-pressed samples: The study of the polarization--field hysteresis loops of the present samples yielded a remanent polarization of 6.8 [mu]C/m[sup 2] and a coercive field of 1.6 kV/cm. The low coercive field of PLZT ceramics could potentially reduce the driving voltage of electrooptic devices in many applications.
- OSTI ID:
- 7182664
- Journal Information:
- Journal of the American Ceramic Society; (United States), Vol. 75:9; ISSN 0002-7820
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
74 ATOMIC AND MOLECULAR PHYSICS
CERAMICS
FABRICATION
SINTERING
COMPOSITE MATERIALS
INORGANIC POLYMERS
HYDROLYSIS
PZT
LANTHANUM ADDITIONS
COERCIVE FORCE
GRAIN SIZE
HYSTERESIS
OPTICAL PROPERTIES
POLARIZATION
POWDERS
PRECURSOR
TEMPERATURE RANGE 0400-1000 K
THERMODYNAMIC PROPERTIES
ALLOYS
CHEMICAL REACTIONS
CRYSTAL STRUCTURE
DECOMPOSITION
LANTHANUM ALLOYS
LEAD COMPOUNDS
LYSIS
MATERIALS
MICROSTRUCTURE
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
POLYMERS
RARE EARTH ADDITIONS
RARE EARTH ALLOYS
SIZE
SOLVOLYSIS
TEMPERATURE RANGE
TITANATES
TITANIUM COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
ZIRCONATES
ZIRCONIUM COMPOUNDS
360202* - Ceramics
Cermets
& Refractories- Structure & Phase Studies
360201 - Ceramics
Cermets
& Refractories- Preparation & Fabrication
360204 - Ceramics
Cermets
& Refractories- Physical Properties
664400 - Experimentally Derived Information on Atomic & Molecular Properties- (1992-)