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Dielectric Properties of the Bismuth Neodymium Titanate Pyrochlore Solid Solution
Author(s) -
Kunej Špela,
Škapin Srečo D.,
Suvorov Danilo
Publication year - 2012
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.1551-2916.2012.05108.x
Subject(s) - pyrochlore , dielectric , materials science , solid solution , bismuth , analytical chemistry (journal) , ceramic , neodymium , mineralogy , atmospheric temperature range , titanate , phase (matter) , chemistry , thermodynamics , optics , composite material , metallurgy , optoelectronics , chromatography , laser , physics , organic chemistry
The dielectric properties of a new, cubic, pyrochlore‐type solid solution B i (1.6−1.08 x ) N d x T i 2 O (6.4−0.11 x ) have been studied across the compositional range 0.35 < x < 0.86. The dielectric constant (ε) of the ceramics based on the pyrochlore‐type solid solution within the experimental compositional range varied from 104 to 76 at 1 MHz, whereas the dielectric losses were well below tan δ = 8 × 10 −3 . The temperature coefficient of the dielectric constant τ k for single‐phase pyrochlore samples was found to be in the range between −20 and −40 ppm/K. Below room temperature dielectric relaxation phenomena were observed for all the compositions.