Publication detail

Temperature effect on elastic and fracture behaviour of lead-free piezoceramic BaTiO3

CHLUP, Z. DRDLÍK, D. HADRABA, H. ŠEVEČEK, O. ŠIŠKA, F. ERHART, J. MACA, K.

Original Title

Temperature effect on elastic and fracture behaviour of lead-free piezoceramic BaTiO3

Type

journal article in Web of Science

Language

English

Original Abstract

Ferroelectric ceramics, especially piezoceramics, are widely used in the field of sensors, micromanipulators, and capacitors. Barium titanate and its derivates are the first choices between lead-free materials. The main aim of the paper is to clarify fundamental processes taking place in the vicinity of Curie temperature with a focus on the fracture behaviour of pure polycrystalline barium titanate. The explanation of observed changes in the me-chanical behaviour of this material is based on the experimental approach supported by numerical simulations utilising features of the real microstructure on the grain level. Several model materials with various grain mi-crostructures were manufactured from the submicron barium titanate powder sintered at various temperatures. Two resulting materials with a suitable distribution of grains were selected for further investigation. The grain size influenced not only the exact position of the temperature of the Curie point but also the kinetics of the lattice transformation, elastic, and fracture properties. The significant drop observed in the fracture resistance was attributed to the development of localised internal thermal stresses, which was supported by the results of the performed numerical simulations. The coincidence of the volume change of neighbouring grains due to lattice transformation together with a significant variation in elastic properties can lead up to a 20% decrease in the measured fracture toughness. Understanding this behaviour is essential for the processing and correct application of lead-free barium titanate materials.

Keywords

Barium titanate; Fracture resistance; Curie temperature; FEM; Thermal stresses

Authors

CHLUP, Z.; DRDLÍK, D.; HADRABA, H.; ŠEVEČEK, O.; ŠIŠKA, F.; ERHART, J.; MACA, K.

Released

3. 4. 2023

Publisher

ELSEVIER SCI LTD

Location

OXFORD

ISBN

0955-2219

Periodical

Journal of the European Ceramic Society

Year of study

43

Number

4

State

United Kingdom of Great Britain and Northern Ireland

Pages from

1509

Pages to

1522

Pages count

14

URL

https://www.sciencedirect.com/science/article/pii/S0955221922009050

BibTex

@article{BUT182432,
  author="Zdeněk {Chlup} and Daniel {Drdlík} and Hynek {Hadraba} and Oldřich {Ševeček} and Filip {Šiška} and Jiří {Erhart} and Karel {Maca}",
  title="Temperature effect on elastic and fracture behaviour of lead-free piezoceramic BaTiO3",
  journal="Journal of the European Ceramic Society",
  year="2023",
  volume="43",
  number="4",
  pages="1509--1522",
  doi="10.1016/j.jeurceramsoc.2022.11.030",
  issn="0955-2219",
  url="https://www.sciencedirect.com/science/article/pii/S0955221922009050"
}