Powderless processing of ceramics: Thin-layer electroceramics |
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| Authors: | D A Payne |
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| Institution: | (1) Department of Materials Science and Engineering, Materials Research Laboratory and Beckman Institute, University of Illinois at Urbana-Champaign, 61801 Urbana, Illinois, USA |
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| Abstract: | A review is made of progress on the sol-gel processing of dense insulating electroceramics by polymeric condensation routes. Up until the past ten years, powders and porous coatings were principally made for optical and conductive applications. Much effort was expended on silica (SiO2) and silicate-based systems. Recently, these approaches have been extended to non-silicate systems 1]. In this paper information is presented for the powderless processing of selected electroceramics in thin-layer form. Materials include PbTiO3, BaTiO3, Ba1–x
Pb
x
TiO3, PbZrO3, Pb(Zr1–y
Ti
y
)O3 and (Pb1–x
La
x
)(Zr1–y
Ti
y
)O3 which find applications in ceramic capacitors, piezoelectric transducers and electrooptic modulators. The approach is to avoid powders, and the attendent problems of powder handling, flow, packing, etc., and make use of polymerization condensation reactions to form extended networks with chemical linkage. Data are reported for the synthesis and low temperature processing routes for amorphous and polycrystalline ceramics. |
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| Keywords: | polymeric condensation liquid precursors ceramic dielectrics dense insulators PbTiO3 PZT PLZT BaTiO3 |
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