Vansil Wollastonite

Alternate Names: Vansil

Description: Calcium Metasilicate

Oxide	Analysis	Formula
CaO	45.00%	0.95
K2O	0.10%	-
MgO	1.50%	0.04
Na2O	0.10%	-
Al2O3	0.70%	0.01
SiO2	50.00%	0.99
Fe2O3	0.20%	-
LOI	1.60%	n/a
Oxide Weight		115.91
Formula Weight		117.79

Notes

This is the most common grade used in ceramic wall and floor tile, in glazes, and in frits for glazes and enamels. It also finds use in glaze and body stains, in bonds for vitrified grinding wheels, in electrical insulators, and as an auxiliary flux.

Different grades of the material vary in particle size (especially in the +325-200 range)

Density Mg/m3: 2.9
Weight (lbs/gal): 24.2
pH at 10% solids: 10-11
GE Brightness: 83
Hegman Fineness: 4
+325 mesh: 0.03%

W-10 has similar data except it is 19% +325 mesh (200 mesh grade). W-20 is 2.5% +325 mesh.
W-C-1 and DFSP are crushed.

Related Information

Vansil Wollastonite grade info

Links

Materials	Wollastonite
Typecodes	Flux Source Materials that source Na2O, K2O, Li2O, CaO, MgO and other fluxes but are not feldspars or frits. Remember that materials can be flux sources but also perform many other roles. For example, talc is a flux in high temperature glazes, but a matting agent in low temperatures ones. It can also be a flux, a filler and an expansion increaser in bodies.
URLs	http://www.vanderbiltminerals.com/product_categories/product_listing/category/paint-and-coatings-products-vansil-wollastonites Vansil Wollastonite Data Sheet Links
URLs	https://www.vanderbiltminerals.com/resources/Minerals_and_Chemical_for_Ceramics_and_Refractories_web.pdf Vanderbilt Minerals for Ceramics Technical Sheet Includes Vansil, Pyrax, Peerless, Dixie, Veegum, Vanzan, Darvan.

By Tony Hansen
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