Effects of mechanical activation on the sintering and dielectric properties of oxide-derived PZT. [Lead Zirconate Titanate]
- National Univ. of Singapore (Singapore). Dept. of Materials Science
A single phase, nanocrystalline perovskite PZT powder has been successfully derived from a mixture of oxides via a mechanical activation route. Unlike in the conventional solid state reaction, the perovskite PZT phase was first triggered and then progressively formed without passing through the intermediate PT and PZ phases with increasing degree of mechanical activation. Similarly, the formation of a single phase PZT of perovskite structure can be completed in a partially activated mixture of oxide powders when heated at an elevated temperature, also without involving PT and PZ as transitional phases. Dense PZT (> 95% theoretical density) with excellent dielectric properties was obtained when the mechanically activated powders are sintered at 1,150 C. The relative density and dielectric properties of sintered PZT were improved when the formation of perovskite phase is completed by the mechanical activation.
- OSTI ID:
- 6194227
- Journal Information:
- Acta Materialia, Vol. 47:9; ISSN 1359-6454
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
DIELECTRIC PROPERTIES
LEAD OXIDES
MILLING
POWDERS
SINTERING
TEMPERATURE RANGE 1000-4000 K
TITANIUM OXIDES
ZIRCONIUM OXIDES
CHALCOGENIDES
ELECTRICAL PROPERTIES
FABRICATION
LEAD COMPOUNDS
MACHINING
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
TEMPERATURE RANGE
TITANIUM COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
ZIRCONIUM COMPOUNDS
360204* - Ceramics
Cermets
& Refractories- Physical Properties
360201 - Ceramics
Cermets
& Refractories- Preparation & Fabrication