Publication detail

Processing of 0.55(Ba0.9Ca0.1)TiO3-0.45Ba(Sn0.2Ti0.8)O-3 lead-free ceramics with high piezoelectricity

BIJALWAN, V. TOFEL, P. SPOTZ, Z. ČÁSTKOVÁ, K. SOBOLA, D. ERHART, J. MACA, K.

Original Title

Processing of 0.55(Ba0.9Ca0.1)TiO3-0.45Ba(Sn0.2Ti0.8)O-3 lead-free ceramics with high piezoelectricity

Type

journal article in Web of Science

Language

English

Original Abstract

We report a large piezoelectric constant (d(33)), 720 pC/N and converse piezoelectric constant (d(33)*), 2215 pm/V for 0.55(Ba0.9Ca0.1)TiO3-0.45Ba(Sn0.2Ti0.8)O-3 ceramics; the biggest value achieved for lead-free piezoceramics so far. The ceramic powders were calcined between 1050 degrees C-1350 degrees C and sintered at 1480 degrees C. The best properties were obtained at a calcination temperature (CT) of 1350 degrees C. The fitting combination of processing and microstructural parameters for example, initial powder particle size >2 mu m, ceramics density similar to 95%, and grain size similar to 40 mu m led to a formation of orthorhombic-tetragonal-pseudo-cubic (O-T-PC) mixed phase boundary near room temperature, supported by Raman spectra, pointed to the extremely high piezoelectric activity. These conditions significantly increase piezoelectric constants, together with high relative permittivity (epsilon(r)) >5000 and a low loss tangent (tan delta) of 0.029. In addition, the d(33) value stabilizes in the range of 400-500 pC/N for all samples calcined between 1050 degrees C and 1250 degrees C. The results entail that the (Ba,Ca)(Sn,Ti)O-3 ceramics are strong contenders to be a substitute for lead-based materials for room temperature applications.

Keywords

(Ba,Ca)(Sn,Ti)O3; lead-free ceramics; microstructure; morphotropic phase boundary; piezoelectric materials; properties

Authors

BIJALWAN, V.; TOFEL, P.; SPOTZ, Z.; ČÁSTKOVÁ, K.; SOBOLA, D.; ERHART, J.; MACA, K.

Released

1. 8. 2020

Publisher

WILEY

Location

HOBOKEN

ISBN

0002-7820

Periodical

Journal of the American Ceramic Society

Year of study

103

Number

8

State

United States of America

Pages from

4611

Pages to

4624

Pages count

14

URL

https://ceramics.onlinelibrary.wiley.com/doi/full/10.1111/jace.17090

BibTex

@article{BUT163798,
  author="Vijay {Bijalwan} and Pavel {Tofel} and Zdeněk {Spotz} and Klára {Částková} and Dinara {Sobola} and Jiří {Erhart} and Karel {Maca}",
  title="Processing of 0.55(Ba0.9Ca0.1)TiO3-0.45Ba(Sn0.2Ti0.8)O-3 lead-free ceramics with high piezoelectricity",
  journal="Journal of the American Ceramic Society",
  year="2020",
  volume="103",
  number="8",
  pages="4611--4624",
  doi="10.1111/jace.17090",
  issn="0002-7820",
  url="https://ceramics.onlinelibrary.wiley.com/doi/full/10.1111/jace.17090"
}