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Journal of Materials Science

, Volume 42, Issue 14, pp 5880–5882 | Cite as

High temperature biaxial strength of porous mullite-alumina and mullite-zirconia ceramics

  • Bruno A. LatellaEmail author
  • Edward G. Mehrtens
Letter

Hot gas cleaning in coal combustion and gasification in the power generation industry is achieved by using porous ceramic filters [1]. These ceramic filters are high in porosity (up to 80%), have good thermal shock resistance and adequate gas permeability. In service, the filters are subjected to repeated impacts from fine particles (8 μm or greater) at velocities of about 50 mm/s in a gas stream at temperatures ranging from 400 °C to 1,000 °C. Therefore, the ceramic filter element must be able to withstand the contact of particles, the sudden temperature increase at the face of the filter and the pressure differential due to the gas. It is well known that mullite-based ceramics exhibit excellent thermal shock resistance [2]. In this communication we report the biaxial strength of porous mullite-alumina (designated MA) and mullite-zirconia (designated MZ) ceramics over a range of temperatures up to 1,250 °C.

Standard ceramic processing methods were used to prepare the mullite-alumina...

Keywords

Thermal Shock Resistance Porosity Level Apparent Porosity Median Particle Size Ceramic Filter 

References

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    Alvin MA (1996) Ind Eng Chem Res 35:3384CrossRefGoogle Scholar
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    Schneider H, Okada K, Pask J (1994) Mullite and mullite ceramics. John Wiley & Sons, ChichesterGoogle Scholar
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    Deng H, Latella BA, Liu T, Ke Y, Zhang L (2003) Mater Sci Forum 437–438:423CrossRefGoogle Scholar
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    Latella BA, Henkel L, Mehrtens EG (2006) J Mater Sci 41:423CrossRefGoogle Scholar
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    Australian Standard 1774.5 (1989) Refractories and refractory materials physical test methods. Method 5: the determination of density, porosity and water absorption. Standards Australia, Sydney, p 1Google Scholar
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    Latella BA, Humphries SR (2004) Scr Mater 51:635CrossRefGoogle Scholar

Copyright information

© Springer Science+Business Media, LLC 2007

Authors and Affiliations

  1. 1.Institute of Materials and Engineering ScienceAustralian Nuclear Science and Technology OrganisationMenaiAustralia

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