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Ceramic & Graphite Insulation
These Blankets are solid, light and flexible and are produced from alumina * silica fibre, and are free of binders 'dry woven). During the production process the fibres are tightly woven i.e. Interlinked. This results in a tough blanket of strictly controlled thickness and bulk density with excellent handling properties.
| Ceramic Blankets |
|
 |
| Thickness |
6 mm to 50 mm |
| Standard size |
610x7.300 mm |
| Densities |
64 to l28 kg/m2 |
| Temperature range |
1260 to 1650°C |
| Composition |
Al2O2 + SiO2 + inorganic binders |
| Color |
white |
| Ceramic Ropes |
|
 |
| Reinforcements |
Glass, SS, brass and inconel |
| Type |
Round. Sqaure, Braided or twisted |
| Standard size |
6 mm to 50 mm any type |
| Temperature |
500 to 1260°C |
| Ceramic Cloth & Tapes |
|
 |
| Reinforcements |
Glass, SS, brass and inconel |
| Thickess |
2mm to 5mm |
| Width: Tape |
15 mm to 200 mm |
| Width: Ceramic Cloth |
40" |
| Roll length |
30 mtr |
| Temperature |
500 to 1260°C |
Ultra Heat resistant Ceramic
Board and Graphite Insulation |
Special Ultra Heat resistant ceramic
insulation Boards and Carbon Graphite insulation can be supplied
upto temperatures 2,750°C |
Hi-Tech
Carbon and Graphite Felts:
Hi-Tech Carbon and Graphite Felts: Are designed
for use as high temperature insulation in resistance furnace or
induction heated vacuum furnaces and inert gas furnace .Made of
carbon or graphite fibers, these materials have low thermal conductivity
and Vapour pressure. They are used in oxidizing atmospheres up to
3500C and in protective atmosphere or vacuum up to 30000C
although carbon and graphite felts are slight electrical conductors,
in a conductive field under 12 kilohertz ,they do not couple and
heat up. At higher frequencies, the tendencies.
Grade HTG Graphite Felt: Graphite felt grade HTG is preferred
for vacuum service because of it’s negligible gas evolution
when heated to 30000C.It also exhibits the greatest oxidation
resistance in the presence of trace oxidizing elements in the atmosphere
.Shrinkage and water absorption are negligible. Grade HTG has been
processed to a minimum temperature of 25000 C.
Have high purity levels with low sulphur content and are not wetted
by most molten metals. Available in various thickness and can be
easily cut with the scissors.
Grade HTC Carbon Felt: Carbon felt grade HTC is preferred
for vacuum service because of it’s negligible gas evolution
when heated to 14000C.It also exhibits the greatest oxidation
resistance in the presence of trace oxidizing elements in the atmosphere
.Shrinkage and water absorption are negligible. Grade HTC has been
processed to a minimum temperature of 14000 C.
Have high purity levels with low sulphur content and are not wetted
by most molten metals. Available in various thickness and can be
easily cut with the scissors.
Carbon felts is used for application of lower temperatures where
chemical purity is not as critical.
Typical Physical Characteristics
Property |
Units Degrees |
Determined at Grade: HTC |
Carbon Felt Grade: HTG |
Graphite Felt |
Density |
LB/Cu Ft |
20 |
5.5 |
5.0 |
Tensile Strength |
LB/in -width |
20 |
2 |
1 |
Comprehensive Strength 10% deformation |
LB/Sq.in |
20 |
0.3-1.0 |
0.2-0.5 |
Shrinkage ,Linear |
% |
To 3000 |
1 |
NIL |
Absorption in 90%
Relative humidity |
Weight % |
20 |
1 |
NIL |
Carbon Assay, Min |
% |
|
99 |
99.9 |
Ash |
% |
|
0.25 |
0.02 |
Specific Heat |
BTU/lb/deg.F |
20 |
0.17 |
0.17 |
Specific Heat, Mean |
BTU/lb/deg.F |
1400 |
0.4 |
0.4
|
Emissivity App. |
|
|
0.99 |
0.99 |
Sublimation Temp. |
Deg.C |
3,600 |
3,600 |
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(Via nitrogen) |
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