Barium sulfate (or sulphate) is the inorganic compound with the chemical formula BaSO4.It is a white crystalline solid that is odorlessand insoluble in water.About 80% of the world's barium sulphate production, mostly purified mineral is consumed as a component of oil well drilling fluid.It increases the density of the fluid.

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Thermal Conductivity : Low
Chemical Composition : CaCO3 (Calcium Carbonate)
Dimensional Stability : Other, Stable under normal conditions
Types of Refractories : Basic Refractory
Color : White
Strength : Moderate
Thermal Conductivity : Low
Chemical Composition : CaCO3 (Calcium Carbonate)
Dimensional Stability : Other, Excellent dimensional stability
Types of Refractories : Other, Not applicable (Commonly used as filler, not as a refractory)
Color : White
Strength : High mechanical strength for filler applications
Thermal Conductivity : Effective thermal conductivity under high temperatures
Chemical Composition : Primarily composed of zirconium silicate (ZrSiO4)
Dimensional Stability : Other, High dimensional stability under thermal stress
Types of Refractories : Other, Refractory material
Color : Brownish
Strength : High mechanical strength
Thermal Conductivity : Low
Chemical Composition : Hydrated magnesium silicate (Mg3Si4O10(OH)2)
Dimensional Stability : Other, High
Types of Refractories : Nonrefractory, Other
Color : White
Strength : Soft easily scratched (Mohs hardness: 1)