Publication detail

Preparation and characterization of novel environmentally friendly Al2O3/SiO2/CaO ceramic foams

BERTOLLA, L. CHLUP, Z. TATARKO, P. HANZEL, O. ŠEVEČEK, O. ROUPCOVÁ, P. DLOUHÝ, I.

Original Title

Preparation and characterization of novel environmentally friendly Al2O3/SiO2/CaO ceramic foams

Type

journal article in Web of Science

Language

English

Original Abstract

Low–cost Al2O3-SiO2-CaO ceramic foams were prepared using a novel and simple reactive foaming process. The foamed green bodies were produced by mixing aluminium powder and calcium hydroxide in an aqueous solution of sodium silicate and sintered in an argon atmosphere using a pressureless electric current assisted process (T = 800 °C). An additional thermal treatment was performed in air using a conventional furnace (T = 1050 °C) in order to oxidize the residual metallic phases. The resulting foams exhibited open porosity, densities ranging from 0.50 to 0.65 g/cm3 and wide pore size distribution (0.04–400 µm). The compressive strength and thermal diffusivity of these foams ranged from 2.12 to 1.01 MPa and from 0.27 to 0.45 mm2s−1, respectively, which indicate their suitability as thermal insulator materials.

Keywords

Porous ceramics; Silicates; Thermal diffusivity; Compressive strength

Authors

BERTOLLA, L.; CHLUP, Z.; TATARKO, P.; HANZEL, O.; ŠEVEČEK, O.; ROUPCOVÁ, P.; DLOUHÝ, I.

Released

15. 10. 2018

Publisher

Elsevier

Location

Netherlands

ISBN

0272-8842

Periodical

Ceramics International

Year of study

44

Number

1

State

United Kingdom of Great Britain and Northern Ireland

Pages from

19063

Pages to

19069

Pages count

7

URL

https://www.sciencedirect.com/science/article/pii/S0272884218318376?via%3Dihub

BibTex

@article{BUT149057,
  author="Luca {Bertolla} and Zdeněk {Chlup} and Peter {Tatarko} and Ondrej {Hanzel} and Oldřich {Ševeček} and Pavla {Roupcová} and Ivo {Dlouhý}",
  title="Preparation and characterization of novel environmentally friendly Al2O3/SiO2/CaO ceramic foams",
  journal="Ceramics International",
  year="2018",
  volume="44",
  number="1",
  pages="19063--19069",
  doi="10.1016/j.ceramint.2018.07.107",
  issn="0272-8842",
  url="https://www.sciencedirect.com/science/article/pii/S0272884218318376?via%3Dihub"
}