Publication detail

Fabrication of graded porous ceramics using alumina-carbon powder mixtures

MACA, K. DOBŠÁK, P. BOCCACCINI, A.

English title

Fabrication of graded porous ceramics using alumina-carbon powder mixtures

Type

journal article - other

Language

en

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.

English 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 in English

sintering, porosity, alumina

RIV year

2001

Released

01.01.2001

ISSN

0272-8842

Volume

27

Number

5

Pages count

8

BIBTEX


@article{BUT40122,
  author="Karel {Maca} and Petr {Dobšák} and Aldo {Boccaccini},
  title="Fabrication of graded porous ceramics using alumina-carbon powder mixtures",
  year="2001",
  volume="27",
  number="5",
  month="January",
  issn="0272-8842"
}