Wollastonite

Needle like wollastonite is an excellent inorganic short fibre with 15-20:1 LD ratio.

Needle like wollastonite is an excellent inorganic short fibre with 15-20:1 LD ratio. It’s main function is to improve the hardness, rigidity and bending strength of products, and at the same time, can improve the electrical properties of plastics and raise the heat stability.

The fibrous form of wollastonite can be very beneficial in bodies. In low fired ceramics wollastonite reduces drying and firing shrinkage and drying and firing warpage. It also promotes lower moisture and thermal expansion in the fired product. It fires with no LOI and its fibers help vent out gassing. These factors have made it a valuable component in tile bodies, especially for fast fire. Vitreous and semi vitreous bodies can also show reduced shrinkage with small additions (2-5%), however wollastonite becomes a stronger flux as temperatures go above 1100°C

TYPICAL PROPERTIES
SiO2 (%)	49-52
CaO (%)	43-45
Al2O3 (%)	0.26
Fe2O3 (%)	0.30
TiO2 (%)	0.93
MgO (%)	0.02
Wt.Loss @1050°C	2.5-4
Ratio of length to diameter (L/D)	15-20:1
Sedimentation value (ml/200m)	40-90
Oil Absorption (g/100g)	20-26
Whiteness (%)	76- 92
Expansion Coefficient (mm/mm°C)	6.5×10-6
Melting Point (°C)	1450
Density (g/cm3)	2.95
Hardness (Mohs)	4.5-5

CLASSIFICATION
CAS NO.	2530909100
H.S.CODE	13983-17-0

APPLICATION

Plastics,

Rubber,

Ceramics

Asbestos substitutes,

Coatings and paints

PACKING

25kgs per bag

Or according customer’s request.

STORAGE

Store in cool, dry condition and keep away from direct heat and sunlight. When not using the material, ensure that the packings are sealed.

SHELF LIFE

At least 12 months when stored in sealed packing under above mentioned condition.

SUPPLY

17.5mt per 20’ container.

Wollastonite