Silica 200 Mesh (Sibelco Australia, Lang Lang)
A standard material in Glazecalc's library: its oxide analysis, unity contribution and hazards.
What it is
- Kind
- Silica
- Formula
- SiO₂
- Also called
- Silica 200#, Silica 200 mesh (AU), Silica 200WQ, Silica Flour 200G, Walker BA770
- Made by
- Sibelco Australia (formerly Unimin Australia), Lang Lang, Victoria, Australia
- Sold in
- AU
- Similar materials
- Silica , Flint
- Source
- Unimin Australia, Technical Data - Silica 200WQ (Lang Lang), as posted by Clayworks Australia (archived)
Milled quartz flour (about 90% finer than 45 microns) from Sibelco's Lang Lang operation; the 'Silica 200#' sold by Walker (BA770), Keane, Northcote and Blackwattle. Walker's SDS names the Sibelco WQ series.
Oxide analysis and unity formula
Glazecalc has the analysis of Silica 200 Mesh (Sibelco Australia, Lang Lang) as weight percent of the raw material. The unity contribution is the moles of each oxide in the amount of Silica 200 Mesh (Sibelco Australia, Lang Lang) that holds 1.0 mole of flux, which is how Glazecalc adds it into a recipe's unity formula.
Silica 200 Mesh (Sibelco Australia, Lang Lang) has no flux oxide, so its unity contribution is per formula as written.
| Oxide | Weight % | Unity contribution |
|---|---|---|
| SiO₂ | 99.3 | 1.653 |
| Al₂O₃ | 0.25 | 0.002 |
| Fe₂O₃ | 0.07 | 0.000 |
| TiO₂ | 0.01 | 0.000 |
- Equivalent weight
- 100
- Fired weight
- 99.7
- Loss on ignition
- 0.3%
The equivalent weight is the grams of Silica 200 Mesh (Sibelco Australia, Lang Lang) that hold 1.0 mole of flux. The fired weight is what is left of that after firing.
Hazards and safety
Hazards: Sibelco SDS (milled silica products, 2011): quartz 99%, more than 20% respirable crystalline silica. Prolonged inhalation causes silicosis and lung cancer; avoid breathing the dust.
Use it in a recipe
Add Silica 200 Mesh (Sibelco Australia, Lang Lang) to a recipe in the Glazecalc calculator to see what it does to a glaze's unity formula.