ZA33 M


Sintered alumina-zirconia-silica (AZS) with 10% zirconia


Good corrosion resistance with low open porosity. Available in complex and large shapes.

Typical application

ZA33 M is mainly used in forehearth as glass contact channel blocks. Good corrosion resistance and low porosity associated with good thermal shock resistance.

Its very good corrosion resistance and low porosity ensure a long and consistent lifespan. Its good thermal shock resistance reduces cracking during heat-up.
For applications sensitive to cat scratches and stoning, we recommend BPAL (Zirconia free).

Chemical and physical properties

ZA33 M microstructure

Typical chemical composition


Typical crystallographic analysis

Main crystallographic phase:

  • corundum
  • monoclinic zircon

Secondary phase:

  • mullite
  • silicate phase

Physical characteristics                                                                                           

DescriptionInternational standardsBritish standards
Refractoriness under load (°C)1,640°C2,984°F
Cold crushing strength110Mpa15,954psi
Linear thermal expansion7 10-6K-13.8 10-6°F-1
Thermal conductivity at 1,000°C2.4 W.m-1.K-116.65 BTU in
Apparent porosity15%15%
Typical bulk density3.05g/cm3190pcf


The sintered alumina-zirconia-silica (AZS) with 10% zirconia, ZA33 M solution must be stored in a dry environment protected from weather conditions.

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