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Determining the dielectric constant of injection-molded polymer-matrix nanocomposites filled with barium titanate

Published online by Cambridge University Press:  14 September 2020

Daniel Brito Open the ORCID record for Daniel Brito [Opens in a new window] ,
Guadalupe Quirarte ,
Joshua Morgan ,
Eleanor Rackoff ,
Michael Fernandez ,
Dithi Ganjam ,
Albert Dato Open the ORCID record for Albert Dato [Opens in a new window]  and
Todd C. Monson
Daniel Brito
Affiliation:
Department of Engineering, Harvey Mudd College, 301 Platt Blvd., Claremont, CA91711, USA
Guadalupe Quirarte
Affiliation:
Department of Engineering, Harvey Mudd College, 301 Platt Blvd., Claremont, CA91711, USA
Joshua Morgan
Affiliation:
Department of Engineering, Harvey Mudd College, 301 Platt Blvd., Claremont, CA91711, USA
Eleanor Rackoff
Affiliation:
Department of Engineering, Harvey Mudd College, 301 Platt Blvd., Claremont, CA91711, USA
Michael Fernandez
Affiliation:
Department of Engineering, Harvey Mudd College, 301 Platt Blvd., Claremont, CA91711, USA
Dithi Ganjam
Affiliation:
Department of Engineering, Harvey Mudd College, 301 Platt Blvd., Claremont, CA91711, USA
Albert Dato
Affiliation:
Department of Engineering, Harvey Mudd College, 301 Platt Blvd., Claremont, CA91711, USA
Todd C. Monson*
Affiliation:
Nanoscale Sciences Department, Sandia National Laboratories, 1515 Eubank Blvd., Albuquerque, NM87123, USA
*
Address all correspondence to Todd C. Monson at tmonson@sandia.gov
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Abstract

Barium titanate (BTO) is a ferroelectric perovskite with potential in energy storage applications. Previous research suggests that BTO dielectric constant increases as nanoparticle diameter decreases. This report recounts an investigation of this relationship. Injection-molded nanocomposites of 5 vol% BTO nanoparticles incorporated in a low-density polyethylene matrix were fabricated and measured. Finite-element analysis was used to model nanocomposites of all BTO sizes and the results were compared with experimental data. Both indicated a negligible relationship between BTO diameter and dielectric constant at 5 vol%. However, a path for fabricating and testing composites of 30 vol% and higher is presented here.

Type
Research Letters
Information
MRS Communications , Volume 10 , Issue 4 , December 2020 , pp. 587 - 593
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Copyright
Copyright © The Author(s), 2020, published on behalf of Materials Research Society by Cambridge University Press

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