Wollastonite Ceramic Calcium Magnesium Silicate

Physical Properties Of Associated Ceramics Wollastonite

Wollastonite Ceramic

Wollastonite is a calcium magnesium silicate. Wollastonite compositions can be formulated with 20 to 40 percent porosity. This variable porosity adjusts the overall strength versus thermal shock. Wollastonite is also inert to alkali and glaze vapor attack below 1,850°F. Wollastonite is most often used for kiln furniture. Associated Ceramics is skilled at producing quality steatite, cordierite and wollastonite parts. The following table describes these common bodies; we can work with other formulations as well.

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ACT Material
Code >
  AC-WO600 AC-WO610
Description >  
Wollastonite
    100% 90%
ACT Material
Code >
  AC-WO600 AC-WO610
Color - Brown Tan
Density g/cc 2.7 2.9
Porosity % 35-40 20-25
Flexural
Strength
psi (MPa) 10,000 (69) 18000 (124)
Compressive
Strength
psi (Mpa) 30,000 (207) 45,000 (310)
Tensile
Strength
psi (MPa) - -
Elastic
Modulus
psi x 106 (GPa)    
Fracture
Toughness
MPa/m 1-2 1-2
Dielectric
Strength
Volts/mil 150 180
Dielectric
Loss Tangent
@ 1 MHz    
Thermal
Conductivity
W/m°K 1.0 2.0
Coefficient
Of Thermal
Expansion
cm/cm/°C
(RT to 700°C)
11.8 11
Safe Use
Temperature
°F
°C
2200 1200 2200 1200

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