Publication detail

Modification of barium titanate sintering via rare earth oxides addition: Dilatometric and microstructural study

DRDLÍK, D. MAŘÁK, V. MACA, K. DRDLÍKOVÁ, K.

Original Title

Modification of barium titanate sintering via rare earth oxides addition: Dilatometric and microstructural study

Type

journal article in Web of Science

Language

English

Original Abstract

In this paper, the effect of rare-earth dopants (RE: Ce, Eu, Tb, Dy, and Er) in barium titanate (BT) on the shaping, sintering and microstructure was studied aimed mainly at selecting appropriate dopant for densification delaying while preserving optimal BT characteristics. The addition of dopant oxides into suspension resulted in the reduction of the deposition kinetics. The relative density of doped green bodies was lower than pure BT and decreased with dopant concentration. Only Ce enhanced green density up to 2%. The sintering process was studied using high-temperature dilatometry. The hindering densification caused by dopants was observed, but only 5 wt % of Tb and Er in BT shifted the onset of sintering to higher temperatures that has the potential applicability of these materials in layered ceramic harvesters. The significant positive impact of doping on the microstructure was attained almost in all cases manifesting themselves in higher sintered densities and markedly lower mean grain size compared to pure BT. The XRD and Raman spectroscopy analyses confirmed incorporation of the dopants into the perovskite structure and no significant existence of RE-enriched secondary phases in the microstructure.

Keywords

Barium titanate; Rare-earth elements; Doping; Electrophoretic deposition; High-temperature dilatometry

Authors

DRDLÍK, D.; MAŘÁK, V.; MACA, K.; DRDLÍKOVÁ, K.

Released

13. 5. 2022

ISBN

1873-3956

Periodical

CERAMICS INTERNATIONAL

Year of study

48

Number

17

State

United Kingdom of Great Britain and Northern Ireland

Pages from

24599

Pages to

24608

Pages count

10

URL

https://www.sciencedirect.com/science/article/pii/S0272884222016613?via%3Dihub

BibTex

@article{BUT178207,
  author="Daniel {Drdlík} and Vojtěch {Mařák} and Karel {Maca} and Katarina {Drdlíková}",
  title="Modification of barium titanate sintering via rare earth oxides addition: Dilatometric and microstructural study",
  journal="CERAMICS INTERNATIONAL",
  year="2022",
  volume="48",
  number="17",
  pages="24599--24608",
  doi="10.1016/j.ceramint.2022.05.105",
  issn="1873-3956",
  url="https://www.sciencedirect.com/science/article/pii/S0272884222016613?via%3Dihub"
}