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Humidity Dependence of Apparent Dielectric Constant for DSP Cement Materials at High Frequencies
Author(s) -
Hu Ang,
Fang Yonghan,
Young J. Francis,
Oh YoungJei
Publication year - 1999
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.1151-2916.1999.tb01994.x
Subject(s) - dielectric , humidity , materials science , composite material , relative humidity , range (aeronautics) , cement , constant (computer programming) , mineralogy , thermodynamics , optoelectronics , chemistry , physics , computer science , programming language
The relationship between humidity and dielectric constant for cement densified with small particles (DSP) has been studied in the relative humidity range 0%‐93% and the frequency range 1 MHz to 1 GHz. The calculated dielectric constant appears to increase with increasing humidity as a linear relation at fixed frequency. According to experimental data and basic principles for dielectrics, two experimental expressions are suggested for heterogeneous dielectric materials to describe the observed behavior of the dielectric constant. The expressions fit the experimental data well in the frequency range studied. Apparent dielectric constant decreases with increasing frequency. Polarization of DSP cement is also discussed.