• Mullite Powder Synonyms:

Aluminosilcate, Mullite powder, Aluminum oxide silicate, Porcelainite, Aluminum(III) silicate (2:1), Cyanite, Disthene, Kaopolite, Kyanite, Kyanite, Al2O(SiO4, Mullite, Silicic acid aluminum salt, Valfor,  CAS# 1302-76-7 

• Mullite Powder Formula:

3Al₂O₃·2 SiO₂

• Mullite Powder- What Is Mullite:

Mullite rarely occurs as a mineral in nature. In fact, the word mullite is derived from the Isle of Mull off the English coast, where the only naturally occurring deposits of mullite have ever been found. Naturally occurring mullite is so rare because it is the result of extremely high temperatures that have come into contact with alumino-silicate minerals of just the right type.

• Mullite Powder Description:

A synthetic, fused (or calcined), crystalline aluminum silicate produced in electric arc furnaces from calcined or Bayer process alumina and silica. It has short prismatic crystals. It has low porosity, high resistance to slag attack, good stability in ceramic bonds, excellent volume stability and low shrinkage. It is also available as a spray-dried, sintered, or hollow microsphere product.

• Mullite Powder Typical Chemical Properties Available:

a) Mullite- (Al2O3= 75.2%, SiO2= 24.5%, and Na2O= 0.20%)
b) Zirconia mullite

• Mullite Powder Typical Physical Properties Available:

Sintered pieces, targets, granules and various powder granulations

• Mullite Powder Nominal Physical Constants:

Molecular Weight (g/mol.)
 ~345.94
 
Color
 white
 
Bulk Density (lbs./ft3)
 2.64- 2.88
 
Melting Point (°C)
 1810- 1880
 
Softening Point (°C)
 1650
 
Specific Surface Area
 
 
Thermal Conductivity (BTU/Hr./-Sq.Ft/In)
 8.5
 
Mohs Hardness @20°C
 7- 8
 
Specific Heat (cgs)
 0.175
 
True Specific Gravity
 3.15
 
Coefficient of Expansion (deg.C)
 20-1320
 
Optic Sign (2V) (deg. C)
 + 45-50
 
Apparent Porosity (%)
 3.0- 3.9
 
Refractoriness (deg. C)
 1900
 
Principal refractive Index
 1.654

• Mullite Powder Typical Applications:

Refractory applications like the lining of furnaces, electrode parts, kiln furniture, bricks for the glass industry, molding material for investment and precision casting. Ceramic applications include spark plugs.

• Mullite Powder Typical Packaging:

50 lbs. bags, poly-lined fiber drums and bulk bags

• Mullite Powder TSCA (SARA Title III) Status:

Listed

• Mullite Powder CAS Number:

a) CAS# 1302-76-7

b) CAS# 1302-93-8