Mullite Ceramic Honeycomb Description
Mullite Ceramic Honeycomb is a structured form of ceramic made from mullite (3Al2O3·2SiO2), a silicate mineral of aluminum and silicon, known for its excellent thermal stability, high mechanical strength, and chemical inertness. The honeycomb structure is characterized by a network of interconnected channels or cells arranged in a regular pattern, resembling the hexagonal prismatic wax cells made by bees in a beehive. This unique structure provides an exceptional balance of low density, high surface area, and good thermal and mechanical properties.
Mullite Ceramic Honeycomb Specifications
|
Properties
|
Units
|
Test
|
Value
|
|
Physical
|
|
Chemical Formula
|
-
|
-
|
3Al2O3-SiO2
|
|
Density, ρ
|
g/cm3
|
ASTM C20
|
2.80
|
|
Color
|
-
|
-
|
tan
|
|
Crystal Structure
|
-
|
-
|
orthorhombic
|
|
Water Absorption
|
% @R.T.
|
ASTM C373
|
0.0
|
|
Hardness
|
Moh's
|
-
|
8
|
|
Hardness
|
knoop (kg/mm2)
|
Knoop 100g
|
1450
|
|
Mechanical
|
|
Compressive Strength
|
MPa @ R.T.
|
ASTM C773
|
551
|
|
Tensile Strength
|
MPa @ R.T.
|
ACMA Test #4
|
103.5
|
|
Modulus of Elasticity
(Young's Mod.)
|
GPa
|
ASTM C848
|
150
|
|
Flexural Strength (MOR)
|
MPa @ R.T.
|
ASTM F417
|
170
|
|
Poisson's Ratio, ν
|
-
|
ASTM C818
|
0.25
|
|
Fracture Toughness, KIc
|
MPa x m1/2
|
Notched Beam Test
|
2.0
|
|
Thermal
|
|
Max. Use Temperature
(* denotes inert atm.)
|
ºC
|
No load cond.
|
1700
|
|
Thermal Shock Resistance
|
ΔT (ºC)
|
Quenching
|
300
|
|
Thermal Conductivity
|
W/m-K @ R.T.
|
ASTM C408
|
3.5
|
|
Coefficient of Linear Thermal Expansion, αl
|
µm/m-ºC (~25ºC through ±1000ºC)
|
ASTM C372
|
5.3
|
|
Specific Heat, cp
|
cal/g-ºC @ R.T.
|
ASTM C351
|
0.23
|
|
Electrical
|
|
Dielectric Constant
|
1MHz @ R.T.
|
ASTM D150
|
6.0
|
|
Dielectric Strength
|
kV/mm
|
ASTM D116
|
9.8
|
|
Electrical Resistivity
|
Ω cm @ R.T.
|
ASTM D1829
|
1013
|
Mullite Ceramic Honeycomb Chemical Composition
|
SiO2%
|
25-38
|
|
Al2O3%
|
50-65
|
|
MgO%
|
<1.0
|
|
K2O+Na2O3%
|
<1.0
|
|
Fe2O3%
|
<1.5
|
Mullite Ceramic Honeycomb Applications
- Catalytic Converters in Automotive Exhaust Systems: The honeycomb structure provides a large surface area for the catalytic coating, facilitating the efficient conversion of exhaust gases into less harmful substances.
- Heat Exchangers: Utilized in high-temperature environments for efficient heat transfer with minimal pressure drop, benefiting from the high surface area and thermal stability of mullite.
- Gas Burner Media: Used in industrial burners to improve combustion efficiency, the honeycomb structure helps in evenly distributing the gas flow and increasing the surface area for combustion.
- Filtration: Serving as filters for hot gases or liquids, the mullite ceramic honeycomb can withstand high temperatures and corrosive environments, making it suitable for industrial filtration applications.
- Structural Support and Insulation: In kilns and furnaces, it provides lightweight structural support and insulation while maintaining stability at high temperatures.
Mullite Ceramic Honeycomb Packing
Our Mullite Ceramic Honeycomb is carefully handled during storage and transportation to preserve the quality of our product in its original condition.
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