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Network-Structured BST/MBO Composites Made from Core-Shell-Structured Granulates

Häuser, Kevin ; Zhou, Zhiren ; Agrawal, Prannoy ; Jakoby, Rolf ; Maune, Holger ; Binder, Joachim R. (2023)
Network-Structured BST/MBO Composites Made from Core-Shell-Structured Granulates.
In: Materials, 2023, 16 (2)
doi: 10.26083/tuprints-00023272
Article, Secondary publication, Publisher's Version

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Item Type: Article
Type of entry: Secondary publication
Title: Network-Structured BST/MBO Composites Made from Core-Shell-Structured Granulates
Language: English
Date: 24 February 2023
Place of Publication: Darmstadt
Year of primary publication: 2023
Publisher: MDPI
Journal or Publication Title: Materials
Volume of the journal: 16
Issue Number: 2
Collation: 16 Seiten
DOI: 10.26083/tuprints-00023272
Corresponding Links:
Origin: Secondary publication DeepGreen

A finite element method (FEM)-based simulation approach to predict the tunability in composite materials was developed and tested with analytical data. These tests showed good prediction capabilities of the simulation for the test data. The simulation model was then used to predict the tunability of a network-structured composite, where the dielectric phase formed clusters in a paraelectric network. This was achieved by simulating a reciprocal core-shell unit cell of said network. The simulation showed a high tunability for this network model, exceeding the tunability of the analytically evaluated layered, columnar, and particulate model. The simulation results were experimentally verified with a Ba₀.₆Sr₀.₄TiO₃/Mg₃B₂O₆ (BST/MBO) composite, where core-shell granulates were made with a two-step granulation process. These structured samples showed higher tunability and dielectric loss than the unstructured samples made for comparison. Overall, the structured samples showed higher tunability to loss ratios, indicating their potential for use in tunable radio frequency applications, since they may combine high performance with little energy loss.

Uncontrolled Keywords: ceramic composite, FEM, tunability, dielectric behavior
Status: Publisher's Version
URN: urn:nbn:de:tuda-tuprints-232725
Additional Information:

This article belongs to the Special Issue Advances in Synthesis and Characterization of Dielectric Ceramics

Classification DDC: 600 Technology, medicine, applied sciences > 620 Engineering and machine engineering
Divisions: 18 Department of Electrical Engineering and Information Technology > Institute for Microwave Engineering and Photonics (IMP)
Date Deposited: 24 Feb 2023 09:55
Last Modified: 14 Nov 2023 19:05
SWORD Depositor: Deep Green
URI: https://tuprints.ulb.tu-darmstadt.de/id/eprint/23272
PPN: 509022529
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