To have the nearest Coldwater sales representatives get in touch with you,
please send your request to salesrep@coldwaterseals.com.
Ceramic
Coldwater Ceramic elements are Full-Top ceramics manufactured in a composite assembly, mechanically locked and epoxy
bonded to a FRP base to match the thermal expansion of the ceramics and prevent piano keying.
AL-Oxide
Our 99.5% pure Al-Oxide is a great value. The 99.5% purity is higher than most competitive products,
typically 96%, producing a harder surface and longer life.
Silicon Nitride
Our SN-Nitride is superb for thermal shock resistance and has the lowest coefficient of
friction. SN provides the best fabric life of any ceramic used on a paper machine. More expensive than AL-Oxide
up front, but typically provides less expensive lifecycle costs with the improved clothing life.
Silicon Carbide
Our Silicon Carbide has the highest wear resistance for high speeds or abrasive environments.
We also offer grinding and repair services for all makes of ceramics.
Available in 99.5% pure AL-Oxide, Silicon Nitride, or Silicon Carbide for hydrofoils,
vacufoils, flat suction box covers and forming elements.
Physical Properties
Alumina
Silicon Nitride
Silicon Carbide
MATERIAL CODE
CONDITION
UNITS
99.5AL
SN220
SC2000
BULK DENSITY
g/cc
3.8
3.2
3.1
WATER ABSORPTION
%
0
0
0
HARDNESS
Hv
GPa
16.1
13.7
26.0
Hv
kg/mm2
1650
1400
2650
FLEXURAL STRENGTH
Room Temp.
MPa
320
550
400
1000 °C
MPa
496
-
1400 °C
MPa
-
-
-
FRACTURE TOUGHNESS
Room Temp.
MPam1/2
3.5
5.7
4.0
YOUNG'S MODULUS
GPa
363
291
410
POISSON'S RATIO
Room Temp.
0.23
0.28
0.14
THERMAL EXPANSION
40-400 °C
x10-6/ °C
7.1
2.5
4
THERMAL CONDUCTIVITY
Room Temp.
W/m*K
32
20
103
1200 °C
W/m*K
-
13
-
SPECIFIC HEAT
Room Temp.
J/g*K
0.75
0.66
0.67
HEAT SHOCK RESISTANCE
°C
200
550
350
Note: The values are typical material properties and may vary according to the product's
configuration and manufacturing process.
North America +1 (404) 842-0012 / Europe +46 (0) 554-68 98 20 / Asia +86 (512) 5777-7691 info@coldwaterseals.com
