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Mullite is the mineralogical name given to the only chemically stable intermediate phase in the SiO2 - Al2O3 system. It is a high alumino-silicate produced by calcining low alkali clays in a rotary kiln.

Your contact for 

Vicky Yates

Sales Manager, Refractory Minerals & Olivine
Small black and brown stones on glass plate

Mullite is used in the manufacture of high quality fired and monolithic refractory products.

  • Good high temperature strength
  • Good thermal shock resistance
  • Excellent thermal stability
  • Good abrasion resistance
  • Good resistance to most chemical attack.
  • Good resistance to oxidation and attack by furnace atmospheres
  • Good electrical resistance

Mullite standard grades

  • 5-8mm (-8+5mm)
  • 3-5mm (-5+3mm)
  • 1-3mm (-3+1mm)
  • 0-1mm (-1mm)
  • 0-250μm (-60#)
  • 0-150μm (-100#)
  • 0-15μm (-200#)

Other grades are available on request, please contact your representative for further information.

Mullite packaging

Our Mullite product range is available in 25kg paper sacks, 1000kg bulk bags or as bulk as standard.

Mullite is available in grades 60 and 70 as standard, both of which have excellent properties for use in refractory production including:

Chemical properties of Mullite

  Mullite 60 Mullite 70
Al2O3 [%] 60.0 70.1
MgO [%] 0.2 0.2
SiO2 [%] 34.5 23.5
Fe2O3 [%] 1.4 1.5

Mullite origin

LKAB Minerals' Mullite is sourced from China and is synthetic.

Mullite toxicology

Mullite is inert and non-toxic. For further information please download the Safety Data Sheets in the box on the right.


Interested in what Mullite can do for you?

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My name is Vicky Yates and I'm a Mullite product expert located in United Kingdom.

If you are interested in what this product can do for you, please give me a call or send me a message.

Office +44 1724 273601
Mobile +44 7748 113307

Call during business hours

09:00 AM - 17:00 PM

Local time in United Kingdom is 08:05 AM (UTC +0)

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