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Ensinger PEI

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Unifrax Fibermax® Needled Blanket
Categories: Ceramic; Oxide; Aluminum Oxide; Silicon Oxide

Material Notes: Fibermax® Needled Blankets are high temperature, light weight and flexible products manufactured from polycrystalline mullite fiber that can be exposed to temperatures up to 1600°C (2912°F). Fibermax Needled Blankets contain no organic binders or other additives which cause outgassing fumes or associated problems. In addition to exhibiting excellent resistance to most corrosive agents, Fibermax Needled Blankets also resist oxidation and reduction. Fibermax Needled Blankets are virtually free from shot (unfiberized particles). That makes it ideal for use in environments where the presence of shot is undesirable. The low shot content results in a product with extremely low thermal conductivity. Its unique fiber layup and needling process provide Fibermax Needled Blankets with outstanding consistency, handling strength and resiliency at elevated temperatures.

    General Characteristics
  • Excellent thermal stability and thermal shock resistance
  • Excellent chemical stability
  • Excellent tensile strength
  • Low thermal conductivity
  • Low heat storage
  • High heat reflectance
  • Excellent corrosion resistance
  • Excellent hot strength

    Typical Applications
  • Ceramic: Porcelain kilns, Substrate kilns, Refractory production kilns
  • Steel Production: Reheat furnacing, Continuous annealing furnaces
  • Specialty Applications: Feritic cores, Aluminum homogenizing furnaces, Catalyst supports, Incineration, High-performance atmospheric furnaces, High vibration applications
  • General Refractory Construction: Burner block wraps, Expansion joints, Gaskets, Batten strips

Information Provided by Unifrax I LLC

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Physical PropertiesOriginal ValueComments
Specific Gravity 3.00 g/cc
Density 6.00 lb/ft³
 8.00 lb/ft³
 
Mechanical PropertiesOriginal ValueComments
Tensile Strength, Yield 6.00 psi6 lb/ft3
 8.00 psi8 lb/ft3
 
Thermal PropertiesOriginal ValueComments
Specific Heat Capacity 1.246 J/g-°C
@Temperature 1093 °C
Melting Point 1870 °C
Maximum Service Temperature, Air 1600 °CRecommended Operating Temperature
Shrinkage 0.70 %
@Temperature 1500 °C,
Time 86400 sec
Permanent Linear Shrinkage
 
Component Elements PropertiesOriginal ValueComments
Al2O3 72 %
CaO 0.050 %
Fe2O3 0.020 %
MgO 0.050 %
SiO2 27 %
TiO2 0.0010 %
 
Descriptive Properties
AppearanceWhite
Fiber Diameter (microns)2-3.5
Fiber Surface Area (m2/g)7.65
Leachable Chlorides (ppm)11
Na2O3 (%)0.1
Temperature Grade (°C)1650

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