GENERAL INFORMATION
ZIRCAR Refractory Sheet Type RSLE-56 Moldable is a high
silica fiber reinforced ceramic composite material that is easily cut and formed into flat sheets in addition
to a wide variety of simple and complex shapes. When dried RSLE-56 Moldable
becomes a hard rigid structure. Further heat treatment or exposure to process
temperatures significantly increases the physical strength of this material.
RSLE-56 exhibits a very low coefficient of expansion
1.0 x 10-6 °C which provides
remarkable resistance to the thermal shock up to 1200°C
(2192°F)
in an oxidizing atmosphere and permits its use with rapid
variation in temperature in that zone. Beyond 1200°C
(2192°F)
it
transforms into a crystalline structure, while maintaining
its properties up to 1650°C (3002°F) providing that there is no
significant fall in temperature. At temperatures above
this the material will exhibit surface glazing.
Engineered and produced with low thermal expansion raw materials RSLE-56
exhibits greater thermal shock resistance than moldable alumina matrix
composites. RSLE-56's binder is locked in place and will not separate from its
supporting fiber reinforcement resulting in an homogeneous structure throughout
the material. RSLE-56 is 100% inorganic and once dried undergoes little or no
outgassing.
RSLE-56
also exhibits exceptional non-wetting properties when used
in contact with molten non-ferrous alloys making it useful in numerous molten
metal contact applications.
RSLE-56
is 100% organic free and contains no refractory ceramic fiber.
It is readily machined to precision
tolerances with conventional tooling.
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Other unique properties of RSLE-56
are:
-
Low thermal conductivity.
-
Excellent
electrical insulation
-
High chemical purity.
-
Excellent resistance to
corrosion (from molten metal and glass).
SUGGESTED APPLICATIONS
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PROPERTIES & CHARACTERISTICS
Composition, wt%
|
|
SiO2
|
99 |
Other oxides
|
<1 |
Organics
|
0 |
LOI
|
2 |
Solids Content, % by weight
|
73 |
Density Dry, g/cc (pcf)
|
1.36(84) |
Porosity,%
|
36 |
Color
|
White |
MOR, dry, psi
|
1100 |
MOR, 10 hr.@370°C(698°F) ,psi
|
2300 |
MOR, 16 hr.@1000°C(1832°F),psi
|
3800 |
Compressive strength, dry, room temp.
|
|
@ 8% consolidation, psi
|
1700 |
Compressive strength, 16hr @ 1000°C(1832°F)
|
|
@7% consolidation, psi
|
7200 |
Drying shrinkage , linear (%)
|
2 |
Drying shrinkage , thickness (%)
|
3 |
Hardness, Durometer "D"
|
Dry
|
54 |
10 hr. @
370°C (698°F) |
70 |
16 hr. @ 1000°C (1832°F) |
83 |
Thermal
Conductivity** ASTM C-1113 |
W/m°K(BTU/hr ft²
°F/in) |
200°C(392°F) |
0.55(3.8) |
400°C(752°F) |
0.64(4.4) |
600°C(1112°F) |
0.61(4.2) |
800°C(1472°F) |
0.67(4.6) |
1000°C(1832°F) |
0.75(5.2) |
* Maximum use temperature
is dependent on variables such as stresses, both thermal and mechanical,
and the chemical environment that the material experiences.
** Properties expressed parallel to thickness.
‡ Properties expressed perpendicular to thickness.
Application Instructions
Refractory
Sheet Type RSLE-56 Moldable is a wet blanket shipped rolled up on a
plastic tube, separated and wrapped in plastic. Type RSLE-56 Moldable can
be shaped and molded prior to drying and firing, permitting the
fabrication of complex shapes as well as flat sheets.
To make a flat board: Open
plastic covering and unroll the desired amount of Refractory Sheet Type
RSLE-56 Moldable. Cut to size with a knife. Dry on a rigid glass, wood or
metal plate separated
by a layer of plastic, cloth or paper. Dry at a temperature of 140°F
until dry. A 1/2'' thick sheet of RSLE-56 Moldable will dry completely in
16 to 24 hours. Prevent warping by either restraining or flipping over to
allow drying from both sides. RSLE-56 Moldable can be dried at much higher
temperatures without adverse impact upon the product.
To make a cylinder: Select a smooth mandrel of the
desired size and shape. Wrap mandrel with plastic sheet. Cut enough Type
RSLE-56 Moldable off roll to make the desired shape. Cut a bevel on the
leading edge of the RSLE-56 Moldable with a knife. Wrap the RSLE-56
Moldable around the mandrel to achieve the desired wall thickness. Work
joints together with a tool such as a knife, spatula or screwdriver to
achieve as much fiber to fiber interlocking as possible. Wrap wet cylinder
with porous cloth to hold RSLE-56 Moldable in place while drying. Dry at a
temperature of 140°F
until dry.
To make complex shapes: Make a mold, plaster will
work, with sufficient draft to allow the removal of the formed RSLE-56
Moldable. Form the RSLE-56 into or onto the mold or form by hand working
the material to achieve both complete contact with the mold and to achieve
the desired surface texture. Dry at 1400F
until dry. Large complex shapes can be made by joining sheets of RSLE-56
Moldable together achieving as much fiber to fiber interlocking as
possible. RSLE-56 Moldable adheres to itself well during drying.
Other Information:
-
Once dried, RSLE-56 Moldable becomes permanently rigid.
Reseal packaging around unused material.
-
Do not allow RSLE-56 Moldable to freeze. Freezing will
cause the silica matrix to separate from its fiber reinforcement.
-
RSLE-56 Moldable exhibits a shelf life of approximately
120 days. After 120 days RSLE-56 Moldable will become stiff and will break
upon flexing.
-
Firing RSLE-56 Moldable will increase its physical
strength. Dried and fired RSLE-56Moldable can be sanded, drilled and cut
with conventional tools.
AVAILABILITY
Item # |
Description |
HS30 |
RSLE-56 Moldable Sheet, 24" X 36" X
1/8" |
HS31 |
RSLE-56 Moldable Sheet, 24" X 36" X
1/4" |
HS32 |
RSLE-56 Moldable Sheet, 24" X 36" X
1/2" |
HS33 |
RSLE-56 Moldable Sheet, 24" X 36" X
3/4" |
HS34 |
RSLE-56 Moldable Sheet, 24" X 36" X
1" |
PRICES ARE SUBJECT TO CHANGE
WITHOUT NOTIFICATION AND ARE SUBJECT TO ZIRCAR REFRACTORY COMPOSITES, INC.
TERMS AND CONDITIONS. ALL PRICES ARE F.O.B. FLORIDA, NY AND ARE IN U.S.
DOLLARS
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ZIRCAR REFRACTORY COMPOSITES, INC.
P.O. BOX 489
FLORIDA, NEW YORK 10921
TEL: 845-651-2200, FAX: 845-651-1515
email: sales@zircarchina.com
This information, which is subject to
change, is offered solely for your consideration and should not be taken as a
warranty or representation for which we assume legal responsibility. It is not
to be understood as permission or recommendation to practice a patented
invention without a license and the user should determine whether relevant
patents exist.
Copyrights and trademarks are the property
of ZIRCAR Refractory Composites, Inc.
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