Title :
Effective dielectric constant of a linear matrix filled with linear and nonlinear spherical particles
Author :
Zhou, Kai ; Boggs, Steven
Author_Institution :
Dept. of Phys., Univ. of Connecticut, Storrs, CT, USA
fDate :
June 28 2009-July 2 2009
Abstract :
A finite element study has been carried out to determine the effective dielectric constant of composite materials containing linear or nonlinear fillers. In the linear systems, spherical particles with field-independent dielectric constant are distributed randomly in a linear matrix. The effective dielectric constant is studied as a function of volume fraction and particle size. In the nonlinear system, a Landau thermodynamic model is employed to describe the field-dependent dielectric properties of the filler, and both the ¿hard¿ sphere and ¿soft¿ sphere models are examined at a volume fraction of 40%, which is above percolation for spherical filler.
Keywords :
finite element analysis; particle reinforced composites; particle size; percolation; permittivity; thermodynamics; Landau thermodynamic model; composite materials; dielectric constant; finite element study; hard sphere model; linear matrix filled particle; nonlinear spherical particle; particle size; percolation; soft sphere model; volume fraction; Composite materials; Dielectric constant; Dielectric materials; Electrodes; Finite element methods; High K dielectric materials; High-K gate dielectrics; Linear systems; Materials science and technology; Physics;
Conference_Titel :
Pulsed Power Conference, 2009. PPC '09. IEEE
Conference_Location :
Washington, DC
Print_ISBN :
978-1-4244-4064-1
Electronic_ISBN :
978-1-4244-4065-8
DOI :
10.1109/PPC.2009.5386293
