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Correlation Between Temperature Coefficient of Resonant Frequency and Tetragonality Ratio
Author(s) -
Choi JiWon,
Dover R. B.
Publication year - 2006
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.1551-2916.2005.00841.x
Subject(s) - tetragonal crystal system , temperature coefficient , ideal (ethics) , value (mathematics) , materials science , octahedron , correlation coefficient , oxygen , analytical chemistry (journal) , dielectric , ceramic , thermodynamics , distortion (music) , chemistry , mathematics , crystallography , crystal structure , physics , metallurgy , statistics , amplifier , philosophy , optoelectronics , organic chemistry , epistemology , chromatography , cmos , composite material
We show that the temperature coefficient of the resonant frequency of the tetragonal ceramics, τ f , correlates to the measured tetragonality ratio ( c / a ). This is based on a previously established relation between c / a and the oxygen positional parameter u . As the c / a ratio approaches its ideal value, the value of u also approaches its ideal value and the distortion of the oxygen octahedral decreases, leading to an increase of τ f to a positive value. Theses relations were confirmed by experimental measurements using three dielectric compositions, with varying c / a ratio near ideal.