Publication detail

Fabrication of graded porous ceramics using alumina-carbon powder mixtures

MACA, K., DOBŠÁK, P., BOCCACCINI, A.

Original Title

Fabrication of graded porous ceramics using alumina-carbon powder mixtures

Type

journal article - other

Language

English

Original Abstract

Green bodies consisting of mixtures of submicrometric alumina powder and carbon coal were prepared by cold isostatic pressing. Sintering in air atmosphere resulted in alumina ceramics with controlled porous structure and a highly homogenous distribution of pores. Sintering in vacuum (at 1 to 5 Pa) followed by sintering in air for 2 h at 1530°C led to a graded porous structure. These samples exhibited a highly porous core and a dense surface layer. The conditions of thermodynamic equilibrium for the chemical reactions occurring in the studied system during sintering were calculated. These were used to explain the formation of the graded porosity.

Keywords

sintering, porosity, alumina

Authors

MACA, K., DOBŠÁK, P., BOCCACCINI, A.

RIV year

2001

Released

1. 1. 2001

ISBN

0272-8842

Periodical

Ceramics International

Year of study

27

Number

5

State

United Kingdom of Great Britain and Northern Ireland

Pages from

577

Pages to

584

Pages count

8

BibTex

@{BUT110531
}