Detail publikace

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

Originální název

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

Anglický název

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

Jazyk

en

Originální abstrakt

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.

Anglický abstrakt

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.

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",
  annote="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.",
  address="Elsevier",
  chapter="149057",
  doi="10.1016/j.ceramint.2018.07.107",
  howpublished="online",
  institution="Elsevier",
  number="1",
  volume="44",
  year="2018",
  month="october",
  pages="19063--19069",
  publisher="Elsevier",
  type="journal article in Web of Science"
}