Holosphere - M

Oxide	Analysis	Formula
CaO	0.05%	-
K2O	0.80%	0.01
MgO	0.15%	0.01
Na2O	0.30%	0.01
TiO2	0.20%	-
Al2O3	73.30%	1.00
SiO2	24.70%	0.57
Fe2O3	0.50%	-
Oxide Weight		139.15
Formula Weight		139.15

Notes

A hollow sphere of mullite ceramic, fired at 1740C in sizes of 3.0-5.0mm, 1.5-3.0mm, 0.5-1.5mm. It has very low density, low thermal conductivity and high crushing strength. Its main use is in refractories, but it is also suitable as a bedding material for the firing of delicate ceramic objects of all types.

Refractoriness: 1875/1900C

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