Silica Ash Crucible, is SiO2 > 99%
Rectangular Crucible 25ml, 52 x 42 x 18mm)
Silica Ash Crucible, is SiO2 > 99%, white colour/clear, working temperature higher than 1100 °C. Below dimensions ±.
They will be used to heat 1g of pulverized coal in a Muffle Furnace in air at a specified ramp rate up to a temperature of 815 °C ± 10 °C and maintained at this temperature until constant in mass.
The ash % is calculated from the mass of the residue after incineration.