Issue 18, 2016

A resource efficient design strategy to optimise the temperature coefficient of capacitance of BaTiO3-based ceramics using finite element modelling

Abstract

An in-house finite element modelling package is used to simulate the electrical response of core–shell microstructures of BaTiO3-based (BT) dielectric materials as a design strategy for multilayer ceramic capacitors. By combining this method with experimental material properties, both the temperature coefficient of capacitance (TCC) and the volume ratio of undoped BT ceramic (core phase) to chemically doped BT ceramic (shell phase) to optimise temperature stability can be predicted. This is a faster, more reliable and efficient design strategy than current techniques which are based on iterative experimental protocols. This methodology is illustrated using rare earth-free NaNbO3-doped BT (NNBT) ceramics as an example for which we predict and experimentally confirm an optimised volume fraction ratio of 0.66 undoped BT core to 0.34 of a 2.5% NNBT shell.

Graphical abstract: A resource efficient design strategy to optimise the temperature coefficient of capacitance of BaTiO3-based ceramics using finite element modelling

Article information

Article type
Paper
Submitted
24 Nov 2015
Accepted
05 Jan 2016
First published
14 Jan 2016
This article is Open Access
Creative Commons BY license

J. Mater. Chem. A, 2016,4, 6896-6901

A resource efficient design strategy to optimise the temperature coefficient of capacitance of BaTiO3-based ceramics using finite element modelling

J. S. Dean, P. Y. Foeller, I. M. Reaney and D. C. Sinclair, J. Mater. Chem. A, 2016, 4, 6896 DOI: 10.1039/C5TA09573E

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