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GENERAL INFORMATION
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ZIRCAR Refractory Sheet Type
RSLE-57 is a low expansion high strength reinforced silica
matrix composite . This remarkable material was designed for use as a high
strength insulator in induction hot press applications w.
RSLE-57's very low
thermal expansion coefficient and high hot strength combine to
give it thermal shock resistance not found in other
structural ceramic matrix composite materials.
RSLE-57's exhibits a very low coefficient of expansion
0.3 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 and becomes
brittle. If the exceeded temperature is only localized,
the material still retains its original high
strength properties.
RSLE-57
also exhibits exceptional non-wetting properties when used
in contact with molten aluminum making it useful in
numerous molten aluminum contact applications.
RSLE-57 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-57 are:
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A low thermal conductivity.
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An excellent electrical insulation.
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A high chemical purity.
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An excellent resistance to corrosion (from molten
metal and glass)
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PROPERTIES & CHARACTERISTICS
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Thermal Expansion Coeff.
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Room Temp. to 800°C(1472°F)
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0.3 x 10-6/°C
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Nominal Composition, wt%
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SiO2
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99.7
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Other Oxides
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<0.3
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Organics
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0
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Density, g/cc(pcf)
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2.1(90)
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Porosity, %
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31
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Color
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White
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Hardness, Durometer "D"
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87
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Charpy Impact Strength, ft-lb
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0.8
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Compressive Strength**, MPa(psi)
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at 2.7% consolidation
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48(7000)
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Modulus of Rupture**, MPa(psi)
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30(4300)
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Thermal Conductivity** ASTM C-1113
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W/m°K(BTU/hr ft² °F/in)
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200°C(392°F)
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0.55(3.8)
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400°C(752°F)
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0.64(4.4)
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600°C(1112°F)
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0.61(4.2)
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800°C(1472°F)
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0.67(4.6)
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1000°C(1832°F)
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0.75(5.2)
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Volume Resistivity, ohm-cm
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ASTM D-257-93
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7.5 x 109
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Dielectric Strength, volts/mil
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ASTM D-149-95
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43
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Linear Shrinkage, % ‡
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Length
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Width
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Thickness
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24hrs @800°C(1472°F)
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0.1
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0.1
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0
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24hrs @ 1100°C(2012°F)
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4.9
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4.9
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7.9
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* 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 INFORMATION
MACHINING GUIDELINES
ZIRCAR Refractory Sheet Type RSLE-57
exhibits a uniformly bound fine-pore structure. It can be
machined to precision dimensional tolerances with conventional
carbide tooling following the guidelines outlined below:
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Cutting Tool
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Rotation Speed
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Feed Rate
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Circular Saw Blade, Carbide tipped, 10"
diam. 24
teeth
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3450
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15-20 ft/min
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4 Fluted Carbide End Mill
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1000-2000
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15-20 ft/min
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AVAILABILITY
| Item # |
Description |
| HM01 |
RSLE-57 Boards, 610mm X 915mm X 3mm |
| HM02 |
RSLE-57 Boards, 610mm X 915mm X 6mm |
| HM03 |
RSLE-57 Boards, 610mm X 915mm X 8mm |
| HM04 |
RSLE-57 Boards, 610mm X 915mm X 10mm |
| HM05 |
RSLE-57 Boards, 610mm X 915mm X 12mm |
| HM06 |
RSLE-57 Boards, 610mm X 915mm X 16mm |
| HM07 |
RSLE-57 Boards, 610mm X 915mm X 20mm |
| HM08 |
RSLE-57 Boards, 610mm X 915mm X 30mm |
| HM09 |
RSLE-57 Boards, 610mm X 915mm X 50mm |
| HS01 |
RSLE-57 Boards, 24" X 36" X
1/4" |
| HS02 |
RSLE-57 Boards, 24" X 36" X
3/8" |
| HS03 |
RSLE-57 Boards, 24" X 36" X
1/2" |
| HS04 |
RSLE-57 Boards, 24" X 36" X
5/8" |
| HS05 |
RSLE-57 Boards, 24" X 36" X
3/4" |
| HS06 |
RSLE-57 Boards, 24" X 36" X
1" |
| HS07 |
RSLE-57 Boards, 24" X 36" X 1
1/2" |
| HS08 |
RSLE-57 Boards, 24" X 36" X
2" |
| HS09 |
RSLE-57 Boards, 24" X 36" X
3" |
| HS12 |
RSLE-57 Boards, 24" X 36" X
1/8" |
| HS20 |
RSLE-57 Boards, 36" X 48" X
1/4" |
| HS21 |
RSLE-57 Boards, 36" X 48" X
3/8" |
| HS22 |
RSLE-57 Boards, 36" X 48" X
1/2" |
| HS23 |
RSLE-57 Boards, 36" X 48" X
5/8" |
| HS24 |
RSLE-57 Boards, 36" X 48" X
3/4" |
| HS25 |
RSLE-57 Boards, 36" X 48" X
1" |
| HS26 |
RSLE-57 Boards, 36" X 48" X 1
1/2" |
| HS27 |
RSLE-57 Boards, 36" X 48" X
2" |
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
HOME
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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