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Dielectric Properties of Explosively Compacted BaTiO 3
Author(s) -
GOSWAMI A. K.
Publication year - 1973
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1973.tb12367.x
Subject(s) - materials science , dielectric , intergranular corrosion , curie temperature , composite material , piezoelectricity , crystallite , hysteresis , sintering , ferroelectricity , microstructure , dissipation factor , condensed matter physics , mineralogy , metallurgy , ferromagnetism , optoelectronics , chemistry , physics
Polycrystalline BaTiO 3 was explosively compacted to nearly theoretical density, and its dielectric and piezoelectric properties were investigated. The compacted bodies did not exhibit dielectric hysteresis, a Curie point, or piezoelectric properties; their dielectric constant and dissipation factor increased linearly with temperature. The dielectric constant was much lower than those of similar dense bodies obtained by conventional sintering. These results may be interpreted in terms of weak intergranular bonding and increased numbers of defects generated in the shocked material. When explosively compacted bodies were sintered, normal ferroelectric and piezoelectric properties and improved microstructures were obtained.