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Permittivity effects of particle agglomeration in ferroelectric ceramic-epoxy composites using finite element modeling

Journal Article · · AIP Advances
DOI:https://doi.org/10.1063/1.5053442· OSTI ID:1492869
 [1];  [2];  [3];  [3];  [3];  [3];  [3];  [3];  [3];  [3];  [4]
  1. Harvey Mudd College, Claremont, CA (United States); Univ. of California, Santa Barbara, CA (United States)
  2. Pomona College, Claremont, CA (United States)
  3. Harvey Mudd College, Claremont, CA (United States)
  4. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
+ Show Author Affiliations

Here, the size dependence of the dielectric constants of barium titanate or other ferroelectric particles can be explored by embedding particles into an epoxy matrix whose dielectric constant can be measured directly. However, to extract the particle dielectric constant requires a model of the composite medium. We compare a finite element model for various volume fractions and particle arrangements to several effective medium approximations, which do not consider particle arrangement explicitly. For a fixed number of particles, the composite dielectric constant increases with the degree of agglomeration, and we relate this increase to the number of regions of enhanced electric field along the applied field between particles in an agglomerate. Additionally, even for dispersed particles, we find that the composite method of assessing the particle dielectric constant may not be effective if the particle dielectric constant is too high compared to the background medium dielectric constant.

Research Organization:
Sandia National Laboratories (SNL-NM), Albuquerque, NM (United States)
Sponsoring Organization:
USDOE National Nuclear Security Administration (NNSA)
Grant/Contract Number:
AC04-94AL85000
OSTI ID:
1492869
Report Number(s):
SAND--2019-0656J; 671768
Journal Information:
AIP Advances, Journal Name: AIP Advances Journal Issue: 12 Vol. 8; ISSN 2158-3226
Publisher:
American Institute of Physics (AIP)Copyright Statement
Country of Publication:
United States
Language:
English

References (23)

Berechnung verschiedener physikalischer Konstanten von heterogenen Substanzen. I. Dielektrizitätskonstanten und Leitfähigkeiten der Mischkörper aus isotropen Substanzen journal January 1935
Berechnung verschiedener physikalischer Konstanten von heterogenen Substanzen. I. Dielektrizitätskonstanten und Leitfähigkeiten der Mischkörper aus isotropen Substanzen journal January 1935
Effect of Chain Stiffness on Nanoparticle Segregation in Polymer/Nanoparticle Blends Near a Substrate journal October 2011
Dielectric strength of fine grained barium titanate ceramics journal January 1996
Sintering behaviors and dielectric properties of nanocrystalline barium titanate journal April 2007
Current issues in research on structure–property relationships in polymer nanocomposites journal July 2010
Truncated Wedge-Shaped Nanostructures Formed from Lateral Microphase Separation of Mixed Homopolymer Brushes Grafted on 67 nm Silica Nanoparticles: Evidence of the Effect of Substrate Curvature journal August 2012
Modeling dielectric properties of composites by finite-element method journal December 2002
Calculation of dielectric constant and loss of two-phase composites journal March 2003
Three-dimensional simulations of the complex dielectric properties of random composites by finite element method journal June 2004
The Clausius‐Mossotti problem for cubic arrays of spheres journal February 1978
Dielectric properties of fine‐grained barium titanate ceramics journal August 1985
Permittivity scaling in Ba1−xSrxTiO3 thin films and ceramics journal February 2011
Dielectric constant for binary piezoelectric 0‐3 composites journal March 1993
Effective dielectric constant of periodic composite materials journal August 1996
Effective dielectric constant of random composite materials journal March 1997
The role of interfaces on an apparent grain size effect on the dielectric properties for ferroelectric barium titanate ceramics journal February 1998
The Electrical Conductivity of Composite Media journal August 1956
Colours in Metal Glasses, in Metallic Films, and in Metallic Solutions. II journal January 1906
Metal-insulator phase transition in a V O 2 thin film observed with terahertz spectroscopy journal November 2006
General Strategies for Nanoparticle Dispersion journal March 2006
Nanoparticle Polymer Composites: Where Two Small Worlds Meet journal November 2006
Preparation of nm-Sized Barium Titanate Fine Particles and Their Powder Dielectric Properties journal September 2003

Figures / Tables (16)

FIG. 1(p. 4)figure FIG. 1
TABLE I(p. 4)table TABLE I
FIG. 2(p. 6)figure FIG. 2
FIG. 3(p. 6)figure FIG. 3
TABLE II(p. 6)table TABLE II
FIG. 4(p. 7)figure FIG. 4
FIG. 5(p. 7)figure FIG. 5
FIG. 6(p. 8)figure FIG. 6
FIG. 7(p. 9)figure FIG. 7
FIG. 8(p. 10)figure FIG. 8
FIG. 9(p. 10)figure FIG. 9
FIG. 10(p. 11)figure FIG. 10
FIG. 11(p. 12)figure FIG. 11
FIG. 12(p. 13)figure FIG. 12
TABLE III(p. 13)table TABLE III
FIG. 13(p. 14)figure FIG. 13

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Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS