Detail publikace

Chemical Synthesis, Sintering and Piezoelectric Properties of Ba0.85Ca0.15 Zr0.1Ti0.9O3 Lead-Free Ceramics

ČÁSTKOVÁ, K. MACA, K. CIHLÁŘ, J. HUGHES, H. MATOUŠEK, A. TOFEL, P. BAI, Y. BUTTON, T.

Originální název

Chemical Synthesis, Sintering and Piezoelectric Properties of Ba0.85Ca0.15 Zr0.1Ti0.9O3 Lead-Free Ceramics

Anglický název

Chemical Synthesis, Sintering and Piezoelectric Properties of Ba0.85Ca0.15 Zr0.1Ti0.9O3 Lead-Free Ceramics

Jazyk

en

Originální abstrakt

The preparation of Ba0.85Ca0.15 Zr0,1Ti0.9O3 (BCZT) powders by wet chemical methods has been investigated, and the powders used to explore relationships between the microstructure and piezoelectric properties (d33 coefficient) of sintered BCZT ceramics. Sol–gel synthesis has been shown to be a successful method for the preparation of BCZT nanopowders with a pure tetragonal perovskite phase structure, specific surface area up to 21.8 m2/g and a mean particle size of 48 nm. These powders were suitable for the fabrication of dense BCZT ceramics with fine-grain microstructures. The ceramics with the highest density of 95 % theoretical density (TD) and grain size of 1.3 lm were prepared by uniaxial pressing followed by a two-step sintering approach which contributed to the refinement of the BCTZ microstructure. A decrease in the grain size to 0.8– 0.9 lm was achieved when samples were prepared using cold isostatic pressing. Using various sintering schedules, BCZT ceramics with broad range of grain sizes (0.8–60.5 lm) were prepared. The highest d33 = 410.8 13.2 pC/N was exhibited by ceramics prepared from sol–gel powder sintered at 1425 C, with the relative density of 89.6 %TD and grain size of 36 lm.

Anglický abstrakt

The preparation of Ba0.85Ca0.15 Zr0,1Ti0.9O3 (BCZT) powders by wet chemical methods has been investigated, and the powders used to explore relationships between the microstructure and piezoelectric properties (d33 coefficient) of sintered BCZT ceramics. Sol–gel synthesis has been shown to be a successful method for the preparation of BCZT nanopowders with a pure tetragonal perovskite phase structure, specific surface area up to 21.8 m2/g and a mean particle size of 48 nm. These powders were suitable for the fabrication of dense BCZT ceramics with fine-grain microstructures. The ceramics with the highest density of 95 % theoretical density (TD) and grain size of 1.3 lm were prepared by uniaxial pressing followed by a two-step sintering approach which contributed to the refinement of the BCTZ microstructure. A decrease in the grain size to 0.8– 0.9 lm was achieved when samples were prepared using cold isostatic pressing. Using various sintering schedules, BCZT ceramics with broad range of grain sizes (0.8–60.5 lm) were prepared. The highest d33 = 410.8 13.2 pC/N was exhibited by ceramics prepared from sol–gel powder sintered at 1425 C, with the relative density of 89.6 %TD and grain size of 36 lm.

Dokumenty

BibTex


@article{BUT114429,
  author="Klára {Částková} and Karel {Maca} and Jaroslav {Cihlář} and Hana {Hughes} and Aleš {Matoušek} and Pavel {Tofel} and Yang {Bai} and Timothy William {Button}",
  title="Chemical Synthesis, Sintering and Piezoelectric Properties of Ba0.85Ca0.15 Zr0.1Ti0.9O3 Lead-Free Ceramics",
  annote="The preparation of Ba0.85Ca0.15 Zr0,1Ti0.9O3 (BCZT) powders by wet chemical methods has been investigated, and the powders
used to explore relationships between the microstructure
and piezoelectric properties (d33 coefficient) of sintered BCZT
ceramics. Sol–gel synthesis has been shown to be a successful
method for the preparation of BCZT nanopowders with a pure
tetragonal perovskite phase structure, specific surface area up
to 21.8 m2/g and a mean particle size of 48 nm. These powders
were suitable for the fabrication of dense BCZT ceramics with
fine-grain microstructures. The ceramics with the highest density
of 95 % theoretical density (TD) and grain size of 1.3 lm
were prepared by uniaxial pressing followed by a two-step sintering
approach which contributed to the refinement of the
BCTZ microstructure. A decrease in the grain size to 0.8–
0.9 lm was achieved when samples were prepared using cold
isostatic pressing. Using various sintering schedules, BCZT
ceramics with broad range of grain sizes (0.8–60.5 lm) were
prepared. The highest d33 = 410.8 13.2 pC/N was exhibited
by ceramics prepared from sol–gel powder sintered at 1425 C,
with the relative density of 89.6 %TD and grain size of 36 lm.",
  chapter="114429",
  doi="10.1111/jace.13642",
  howpublished="online",
  number="8",
  volume="98",
  year="2015",
  month="august",
  pages="2373--2380",
  type="journal article in Web of Science"
}