Publication detail

Improved microstructure of alumina ceramics prepared from DBD plasma activated powders

POUCHLÝ, V. RÁHEĽ, J. SPUSTA, T. ILČÍKOVÁ, M. PAVLIŇÁK, D. MORÁVEK, T. MACA, K.

Original Title

Improved microstructure of alumina ceramics prepared from DBD plasma activated powders

English Title

Improved microstructure of alumina ceramics prepared from DBD plasma activated powders

Type

journal article in Web of Science

Language

en

Original Abstract

Submicron Al2O3 powders were activated by Diffuse Coplanar Surface Barrier Discharge (DCSBD) plasma. The influence of the plasma treatment on the powder properties and their impact on the microstructure of dry and wet shaped ceramics were investigated. Raman and FTIR analyses of treated powders showed a substantial increase of the powder’s surface hydroxylation, surface cleaning, and the presence of adsorbed NOx originating from the DCSBD. Sintering of the dry shaped plasma treated powders did not influence sintering behavior. On the other hand, the plasma treated powder was able to form stable water suspension without any chemical stabilization aid. Slip cast samples exhibited finer pore size distribution, a higher sinterability, and a finer final microstructure. The grain size of slip casted plasma treated powder was reduced by a factor of 1.7, which facilitated a grain size of 0.68 μm at the relative density of 99.54% t.d. obtained by pressure-less sintering.

English abstract

Submicron Al2O3 powders were activated by Diffuse Coplanar Surface Barrier Discharge (DCSBD) plasma. The influence of the plasma treatment on the powder properties and their impact on the microstructure of dry and wet shaped ceramics were investigated. Raman and FTIR analyses of treated powders showed a substantial increase of the powder’s surface hydroxylation, surface cleaning, and the presence of adsorbed NOx originating from the DCSBD. Sintering of the dry shaped plasma treated powders did not influence sintering behavior. On the other hand, the plasma treated powder was able to form stable water suspension without any chemical stabilization aid. Slip cast samples exhibited finer pore size distribution, a higher sinterability, and a finer final microstructure. The grain size of slip casted plasma treated powder was reduced by a factor of 1.7, which facilitated a grain size of 0.68 μm at the relative density of 99.54% t.d. obtained by pressure-less sintering.

Keywords

Alumina Slip casting Sintering Grain size DBD plasma treatment

Released

01.04.2019

ISBN

1873-619X

Periodical

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY

Year of study

39

Number

4

State

GB

Pages from

1297

Pages to

1303

Pages count

7

URL

Documents

BibTex


@article{BUT151502,
  author="Václav {Pouchlý} and Jozef {Ráheľ} and Tomáš {Spusta} and Martina {Ilčíková} and David {Pavliňák} and Tomáš {Morávek} and Karel {Maca}",
  title="Improved microstructure of alumina ceramics prepared from DBD plasma activated powders",
  annote="Submicron Al2O3 powders were activated by Diffuse Coplanar Surface Barrier Discharge (DCSBD) plasma. The influence of the plasma treatment on the powder properties and their impact on the microstructure of dry and wet shaped ceramics were investigated. Raman and FTIR analyses of treated powders showed a substantial increase of the powder’s surface hydroxylation, surface cleaning, and the presence of adsorbed NOx originating from the DCSBD. Sintering of the dry shaped plasma treated powders did not influence sintering behavior. On the other hand, the plasma treated powder was able to form stable water suspension without any chemical stabilization aid. Slip cast samples exhibited finer pore size distribution, a higher sinterability, and a finer final microstructure. The grain size of slip casted plasma treated powder was reduced by a factor of 1.7, which facilitated a grain size of 0.68 μm at the relative density of 99.54% t.d. obtained by pressure-less sintering.",
  chapter="151502",
  doi="10.1016/j.jeurceramsoc.2018.11.022",
  howpublished="print",
  number="4",
  volume="39",
  year="2019",
  month="april",
  pages="1297--1303",
  type="journal article in Web of Science"
}