Product Details

Alumina Ceramic Honeycomb For Diesel Particle Filter

Physical Properties:

1) Compressive strength

Direction	200 MCI	400 MCI
A (minimum)	15.0 MPa	15.0 MPa
B (minimum)	1.5 MPa	1.5 MPa
C (minimum)	0.2 MPa	0.2 MPa
Specimen dimensions Φ25.4 mm, length 25.4 mm from direction A, B and C, where A direction: parallel to passageways B direction: perpendicular to passageways and parallel to passageway walls C direction: perpendicular to passageways and 45% to passageway walls Speed: 1mm/min

2) Porosity/water absorption

Item	200 MCI	400 MCI
Minimum	18.6%	17.8%
Maximum	23.4%	20.7%
Average (n>5 per lot)	22.1%	19.6%
Total pore volume	0.18-0.24 (cm3/g)	0.18-0.24 (cm3/g)

3) Bulk density

100 MCI	0.46 g/cm3±15%
200 MCI	0.43 g/cm3±15%
300 MCI	0.50 g/cm3±15%
400 MCI	0.48 g/cm3±15%

4) Coefficient of Thermal Expansion

Item	200 MCI	400 MCI
Heating rate	5C/min, 20C…1000C	5C/min, 20C…1000C
Average	1.5*10-6K-1	1.8*10-6K-1

5) Thermal Conductivity

1.5…1.6 W/mk at temperature 25C…600C

6) Specific Heat Capacity

At:100C/200C/300C
800KJ/Kg950KJ/Kg2000KJ/Kg

7) Continuous High Temperature Durability

Maximum shrinkage of length after 100 hours at 1200C
200MCI 400MCI
Maximum:0.5% 0.1%

8) High Temperature Stability

Maximum shrinkage after 100 hours at 1450C
200 MCI400 MCI
Maximum2.0%2.5%

9) Gas Flow Resistance

Flow speed 16m/s200 MCI400 MCI
Pressure drop {10-2mmAg/mm} 60130

10) Structural Integrity to Thermal Shock

(Cooling with water)
Cracks start at approx. 800C
No destruction of ceramic bodies until approx. 1180C

11) Softening temperature

Definition: temperature, at which the instantaneous rate of thermal expansion is zero.

Procedure: analogous to coefficient of thermal expansion; determination with extrapolation.

Minimum: 1380C

Chemical Composition:

Item	Stoneware	Cordierite	Mullite- Cordierite	Mullite
SiO2	69~71	46~48	29~30	27~28
Al2O3	18~20	34~37	68~69	70~71
MgO	0.15~0.20	7.00~7.50	---	---
K2O.Na2O.CaO	3.00~3.30	2.50~2.90	0.70~0.90	0.80~1.20
Fe2O3	0.70~0.90	0.70~0.90	0.50~0.70	0.50~0.

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Grace Zhang

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