Product Description

Wollastonite forms low-melting point with more refractory phases such as Al2O3 and MgO. Wollastonite (CaO.SiO2) itself has a lower melting point (***0OC for pure wollastonite). The usage of wollastonite in ceramic bodies can amount to as much as *0% or more. Wollastonite serves as a reliable sintering aid to vitrified bodies. The addition of wollastonite results in many positive effects such as less fired shrinkage, low water absorption, lower fast firing temperature, higher green strength, less cracking and shorter firing times.

Wollastonite can also replace limestone and silica sand in a glass batch where it reduces the melting temperature and inhibits scum and seed formation. This is can be important in the production of specialty glasses and fiberglass.

Wollastonite is a mineral comprised chemically of calcium, silicon and oxygen. Its molecular formula can be expressed as CaSiO3. It is commonly referred to as calcium meta-silicate. Our mineral contains ****9% of calcium meta-silicate.

The basic composition is:-

SiO***9%,

CaO**8%,

FeO*3%,

MgO*3%,

AlO*5%,

LOI - 1% only