Publication: Effects of powder preparation and sintering procedure on microstructure and dielectric properties of PLZT ceramics
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Date
Advisor
Coadvisor
Graduate program
Undergraduate course
Journal Title
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Volume Title
Publisher
Int Inst Science Sintering (i I S S)
Type
Article
Access right
Acesso aberto
Abstract
PLZT ceramics belong to one of the very important groups of functional materials that make a basis for the production of a large range of electronic devices. The microstructure and properties of ceramics depend on the powder preparation and thermal processing conditions. Various techniques have been used to obtain chemically homogeneous and fine starting powders. PLZT powders have been prepared by two different production routes: by a modified Pechini method, using a polymeric precursor method (PMM) and by a partial oxalate method. A two-step sintering process, including a hot pressing, was carried out at 1100 and 1200degreesC Distinct phases obtained during the sintering process have been investigated by SEM and EDS techniques and dielectric properties such as permittivity and dielectric loss were measured in a frequency range from 1 to 20 kHz.. A significant difference in microstructure and dielectric properties, depending on powder origin and sintering procedure, has been noticed.
Description
Keywords
sintering, dielectric materials, microstructure
Language
English
Citation
Science of Sintering. Belgrade: Int Inst Science Sintering (i I S S), v. 35, n. 3, p. 133-140, 2003.
