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Effects of Silver and Palladium Doping on the Dielectric Properties of 0.9Pb(Mg 1/3 Nb 2/3 )O 3 –0.1 PbTiO 3 Ceramic
Author(s) -
Sato Yuichi,
Kanai Hideyuki,
Yamashita Yohachi
Publication year - 1996
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.1151-2916.1996.tb07907.x
Subject(s) - doping , dielectric , materials science , ceramic , palladium , perovskite (structure) , grain size , analytical chemistry (journal) , lattice constant , mineralogy , metallurgy , crystallography , chemistry , catalysis , optics , physics , optoelectronics , diffraction , biochemistry , chromatography
The doping of silver and palladium into a 0.9Pb‐(Mg 1/3 Nb 2/3 )O 3 –0.1PbTiO 3 (PMN–PT) ceramic has been investigated. It was found that Ag could be incorporated into the PMN–PT lattice, though this was almost impossible with Pd. Doping at up to 0.2 mol% of Ag and Pd reduced the maximum dielectric constant ( K max ) from 21000 to 14000 without any conspicuous change in physical properties. Order–disorder transitions in the perovskite structure contributed to the decrease in K max , since the diffuseness parameter, δ, which represents the degree of the order‐disorder relationship, increased with Ag doping. However, addition of more than 0.2 mol% increased K max . Increases in grain size and in the perovskite ratio contributed to this increase. The dielectric properties of Ag/Pd‐doped samples were intermediate between the Ag‐ and Pd‐doped samples.