Publication detail

The complex evaluation of functional properties of nearly dense BCZT ceramics and their dependence on the grain size

BIJALWAN, V. TOFEL, P. ERHART, J. MACA, K.

Original Title

The complex evaluation of functional properties of nearly dense BCZT ceramics and their dependence on the grain size

Type

journal article in Web of Science

Language

English

Original Abstract

In this article, the effect of dwell time (2–48 h) during isothermal sintering at 1520 °C on the grain size, density and crystal structure of (Ba0.85Ca0.15)(Zr0.1Ti0.9)O3 is demonstrated. All ceramics exhibited the phase transition from orthorhombic to mixed orthorhombic and tetragonal phases between 12 and 24 h dwell time. The piezoelectric, dielectric and ferroelectric properties of these ceramics show a strong correlation with grain size in the range of 16.5–44.5 μm. Nearly dense microstructure (93.1–94.3% t.d.) was maintained during entire dwell time range without sacrificing much of its functional properties. Increasing grain size caused a little decrease in d33* piezoelectric constant from 480 pC/N to 460 pC/N while mechanical quality factor (Qm) increased from 62 to 136. Diffusivity coefficient (γ) ranges between 1.46 and 1.55 which indicates a normal ferroelectric behavior.

Keywords

Lead free piezoceramics BCZT Sintering Grain size Dielectric properties Mechanical quality factor

Authors

BIJALWAN, V.; TOFEL, P.; ERHART, J.; MACA, K.

Released

1. 1. 2019

ISBN

0272-8842

Periodical

Ceramics International

Year of study

45

Number

1

State

United Kingdom of Great Britain and Northern Ireland

Pages from

317

Pages to

326

Pages count

10

URL

https://www.sciencedirect.com/science/article/pii/S0272884218326312

BibTex

@article{BUT155463,
  author="Vijay {Bijalwan} and Pavel {Tofel} and Jiří {Erhart} and Karel {Maca}",
  title="The complex evaluation of functional properties of nearly dense BCZT ceramics and their dependence on the grain size",
  journal="Ceramics International",
  year="2019",
  volume="45",
  number="1",
  pages="317--326",
  doi="10.1016/j.ceramint.2018.09.169",
  issn="0272-8842",
  url="https://www.sciencedirect.com/science/article/pii/S0272884218326312"
}