Impact of Particle and Crystallite Size of Ba_0.6Sr_0.4TiO₃ on the Dielectric Properties of BST/P(VDF-TrFE) Composites in Fully Printed Varactors.

Content Provider	Europe PMC
Author	Mach, Tim P. Ding, Yingfang Binder, Joachim R.
Editor	González-Benito, Javier
Copyright Year	2022
Abstract	In the field of printed electronics, electronic components such as varactors are of special interest. As ferroelectric materials, Ba0.6Sr0.4TiO3 (BST) and poly(vinylidene fluoride-co-trifluoroethylene) (P(VDF-TrFE)) are promising compounds to be used in functional inks for the fabrication of fully inkjet-printed dielectric layers. In BST/P(VDF-TrFE) composite inks, the influence of the particle and crystallite size is investigated by using different grinding media sizes and thermal treatments at varying temperatures. It was found that with an increasing particle and crystallite size, both the relative permittivity and tunability increase as well. However, the thermal treatment which impacts both the particle and crystallite size has a greater effect on the dielectric properties. An additional approach is the reduction in the dielectric layer thickness, which has a significant effect on the maximal tunability. Here, with a thickness of 0.9 µm, a tunability of 29.6% could be achieved in an external electric field of 34 V µm−1.
Journal	Polymers
Volume Number	14
PubMed Central reference number	PMC9698761
Issue Number	22
PubMed reference number	36433154
e-ISSN	20734360
DOI	10.3390/polym14225027
Language	English
Publisher	MDPI
Publisher Date	2022-11-19
Access Restriction	Open
Rights License	Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). © 2022 by the authors.
Subject Keyword	inkjet printing ceramic/polymer composite tunability printed varactors dielectrics
Content Type	Text
Resource Type	Article
Subject	Chemistry Polymers and Plastics