Ceramic Honeycomb Technical Information

Material Data
Material Type LA10 NT HT MK20 MK30 CR
Material Properties Alumina Porcelain Chemical Porcelain High Temperature Thermal Shock Resistant *NEW* Thermal Shock Resistant Alkali Resistant++
Physical Data
Water Absorption 0.1% 0.0% 20.0% 9.0% 1.0% 6.0%
Solid Density 2.4 g/cm3 2.7 g/cm3 2.35 g/cm3 2.0 g/cm3 2.1 g/cm3 2.5 g/cm3
Thermal Expansion (20 -1000°C) 4.9×10-6 /K 6.5×10-6 /K 6.5×10-6 /K 2.7×10-6 /K 2.1×10-6 /K 6.5×10-6 /K
Specific Heat (100°C) 865 J/kgK 910 J/kgK 927 J/kgK 810 J/kgK 810 J/kgK 920 J/kgK
Thermal Shock Resistance* 210 K 200 K 190 K 350 K 410 K 225 K
Thermal Conductivity 1.6 W/mK 2,1 W/mK 2.2 W/mK 1,9 W/mK 1,9 W/mK 2,1 W/mK
Start of Softening** 1200°C 1200°C 1540°C 1300°C 1300°C 1400°C

*The thermal shock resistance depends mainly on geometry. A thin-walled honeycomb’s actual thermal shock resistance might be much higher than the standard value mentioned above. Ceram-Austria experiments, using honeycombs 150x150x300 mm with channels having a diameter of 3.0 mm, have shown that such elements are able to withstand a shock-like cooling from 300°C to 15°C (cooling by using tap water) without getting damaged.

**Means the start of softening of a standard cylinder at a constant stress of 0.2 N/mm2.

***Hydrofluoric acid: Ceram-Austria experiments using 1% HF as a resting medium on porcelain resulted, when saturated, in a 5% reduction of weight. Gaseous HF did not lead to measurable damages.

++Alkalines: Many years of practical experience and internal tests have shown these high quality materials are resistant against alkalis. At high temperatures/high concentrations, chemical corrosion cannot be excluded.

Length x Width x Height
(mm x mm x mm)		 Channels/Element Width of Channels (mm) Thickness of Wall (mm) Active Surface (m2/m3) Free Cross Section
150 x 150 x 300 5 x 5 = 25 26.0 3.0 150 76%
150 x 150 x 300 13 x 13 = 169 9.0 2.0 310 64%
150 x 150 x 300 25 x 25 = 625 4.9 0.9 580 68%
150 x 150 x 300 32 x 32 = 1024 3.8 0.8 724 66%
150 x 150 x 300 37 x 37 = 1369 3.4 0.6 847 71%
150 x 150 x 300 40 x 40 = 1600 2.9 0.7 880 63%
150 x 150 x 300 43 x 43 = 1849 2.9 0.5 1000 71%
150 x 150 x 300 46 x 46 = 2116 2.7 0.5 1039 68%
150 x 150 x 300 50 x 50 = 2500 2.4 0.55 1090 64%
150 x 150 x 300 50 x 50 = 2500 2.5 0.45 1136 69%
150 x 150 x 150 60 x 60 = 3600 1.8 0.45 1310 64%
150 x 150 x 300 60 x 60 = 3600 1.8 0.45 1310 64%