Determining the dielectric constant of injection-molded polymer-matrix nanocomposites filled with barium titanate. (December 2020)

• Record Type: Journal Article
• Authors: Brito, Daniel; Quirarte, Guadalupe; Morgan, Joshua; Rackoff, Eleanor; Fernandez, Michael; Ganjam, Dithi; Dato, Albert; Monson, Todd C.
• Is Part Of: MRS communications. Volume 10:Number 4(2020)
• Page Start: 587
• Page End: 593
• Publication Date: 2020-12
• Subjects: Materials -- Periodicals; 620.11
• DOI: 10.1557/mrc.2020.69
• Languages: English
• ISSNs: 2159-6859

Abstract

Abstract : 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.