Publication result detail

High strength alumina tapes prepared by gel-tape casting method

ŠŤASTNÝ, P.; CHLUP, Z.; ČÁSTKOVÁ, K.; TRUNEC, M.

Original Title

High strength alumina tapes prepared by gel-tape casting method

English Title

High strength alumina tapes prepared by gel-tape casting method

Type

WoS Article

Original Abstract

In the current work, high strength alumina (Al2O3) thin tapes were prepared by a novel gel-tape casting method. The water-based slurries were gelled by the polymerization of the epoxy monomers. Low viscosity slurries consisting of nanometer-sized alumina particles were prepared with a solid loading reaching 42 vol%. Sodium and ammonium polyacrylate dispersants were used for alumina particle dispersion and stabilization. The individual Al2O3 tapes reached a relative density of over 99.5% and a grain size between 1.1 and 1.3 mu m after pressureless sintering at 1450 degrees C. The biaxial strength of sintered samples was measured in the ball-on-three-balls setup and the values of characteristic Weibull strength up to 1400 MPa were obtained for as-sintered tapes with a thickness of about 190 mu m. The effect of sodium and ammonium-based polyacrylate dispersants on tape processing and properties of the Al2O3 tapes were investigated and explained.

English abstract

In the current work, high strength alumina (Al2O3) thin tapes were prepared by a novel gel-tape casting method. The water-based slurries were gelled by the polymerization of the epoxy monomers. Low viscosity slurries consisting of nanometer-sized alumina particles were prepared with a solid loading reaching 42 vol%. Sodium and ammonium polyacrylate dispersants were used for alumina particle dispersion and stabilization. The individual Al2O3 tapes reached a relative density of over 99.5% and a grain size between 1.1 and 1.3 mu m after pressureless sintering at 1450 degrees C. The biaxial strength of sintered samples was measured in the ball-on-three-balls setup and the values of characteristic Weibull strength up to 1400 MPa were obtained for as-sintered tapes with a thickness of about 190 mu m. The effect of sodium and ammonium-based polyacrylate dispersants on tape processing and properties of the Al2O3 tapes were investigated and explained.

Keywords

Tape casting; Water-based; High strength; Alumina; Ceramics

Key words in English

Tape casting; Water-based; High strength; Alumina; Ceramics

Authors

ŠŤASTNÝ, P.; CHLUP, Z.; ČÁSTKOVÁ, K.; TRUNEC, M.

RIV year

2021

Released

01.03.2021

Publisher

ELSEVIER SCI LTD

Location

OXFORD

ISBN

0272-8842

Periodical

Ceramics International

Volume

47

Number

5

State

United Kingdom of Great Britain and Northern Ireland

Pages from

6988

Pages to

6995

Pages count

8

URL

https://www.sciencedirect.com/science/article/pii/S0272884220333642?via%3Dihub

BibTex

@article{BUT171144,
  author="Přemysl {Šťastný} and Zdeněk {Chlup} and Klára {Částková} and Martin {Trunec}",
  title="High strength alumina tapes prepared by gel-tape casting method",
  journal="Ceramics International",
  year="2021",
  volume="47",
  number="5",
  pages="6988--6995",
  doi="10.1016/j.ceramint.2020.11.048",
  issn="0272-8842",
  url="https://www.sciencedirect.com/science/article/pii/S0272884220333642?via%3Dihub"
}