|
REFRACTORY SHEET MOLDABLE TYPES RS-DA and
RS-DM
GENERAL INFORMATION
|
ZIRCAR Refractory Sheet Type RS-D is a
structural high-alumina product supplied in thin sheet form. It is
composed of high purity alumina, reinforced with high-alumina
ceramic fibers. Refractory Sheet Type RS-D is available in four
types: two types of moldables, and two types of rigid sheets. They
are as follows:
TYPE RS-DA is a plastic highly moldable sheet
ideally suited for forming custom geometries.
TYPE RS-DM Sheet is a moldable form of Type RS-D
with a higher density than obtainable from Refractory Sheet Type
RS-DA. Type RS-DM is ideally suited for fabricating complex shapes
from a flat sheet product for use in metal clad electric band and
strip heaters.
TYPES RS-DA & RS-DM can be readily cut with
a knife or scissors. Joints can be made by wetting both surfaces
with water (with a sponge or brush) and promptly pressing the two
surfaces together. Thickness greater than 1/8" can be made by
laminating two or more sheets together in this manner.
Refractory Sheet Type RS-DD is suitable for die
cutting or stamping of gaskets. It can be re-wet, made moldable, and
handled like Type RS-DM.
Type RS-DR cuts and handles similar to Type
RS-DD except it is slightly less compressible and more rigid. It has
been fired so that it will remain rigid even when wet.
|
TYPE
RS-DD is a rigid sheet that can be moistened with water to
impart moldability. (see Rigid Materials)
TYPE
RS-DR is a rigid pre-fired sheet that has been heat-treated to
remove all organic binder and is stable to moisture attack.
Refractory Sheet Type RS-DR is suited for use as a setter or barrier
for use in the sintering of powder metal parts (see Rigid
Materials).
|
SUGGESTED APPLICATIONS
- ASBESTOS CEMENT BOARD REPLACEMENT
- OVEN CONSTRUCTION
- INDUCTION HEATING LINERS AND COIL
FIXTURES
- HIGH TEMPERATURE GASKETING
- MOLDED SHAPES, TUBES, TRAYS, BOATS, ETC. FOR
SINTERING AND HEAT-TREATING
- HEATING ELEMENT SUPPORT
- FIREPROOF STRUCTURAL INSULATION
- NON-FERROUS METAL HANDLING, SPOUTS, TROUGHS,
CASTING TIPS
- BRAZING SEPARATORS AND FIXTURES
- HOT FURNACE REPAIRS
CHARACTERISTICS &
PROPERTIES
|
Type |
DR |
DD |
DM |
DA |
|
Form |
Rigid sheet |
Rigid sheet2,3 |
Moldable sheet1,3 |
Plastic moldable
sheet1,3 |
|
Typical Composition, % |
|
|
|
|
|
Al2O3 |
90(dry) |
90(dry) |
90(dry) |
90(dry) |
|
SiO2 |
10(dry) |
10(dry) |
10(dry) |
10(dry) |
|
Organics |
nil |
nil |
<1 |
<1 |
|
Color |
White |
White |
White |
White |
|
Density (as supplied), pcf |
130 |
130 |
145 |
100 |
|
after drying @
100°C |
|
|
130 |
85 |
|
Thickness shrinkage, |
|
|
|
|
|
on drying at 100°C,
% |
|
|
10 |
25 |
|
Moisture, as supplied, % |
2 (4) |
3 (4) |
20 |
40 |
|
Maximum Use Temp. * °C(°F) |
1200 (2192) |
1200 (2192) |
1200 (2192) |
1200 (2192) |
|
Melting Point, °C(°F) |
1815 (3300) |
1815 (3300) |
1815 (3300) |
1815 (3300) |
|
Specific Heat, BTU/lb °F |
0.25 |
0.25 |
0.25 |
0.25 |
|
Modulus of Rupture, psi, |
|
as supplied |
3000 |
|
|
|
|
after firing 8 hrs. @
600°C |
|
|
|
490 |
|
Compressive Strength, psi |
|
|
|
|
|
as supplied @
5% compression |
10,000 |
|
|
|
|
at 8%
compression |
20,000 |
|
|
|
|
after firing 8 hrs. @
600°C, |
|
|
|
|
|
10% compression |
|
|
|
200 |
|
Firing Shrinkage, % |
|
|
|
|
|
after 1 hr. @
1000°C |
|
|
|
1 |
|
after 4 hrs. @
1000°C |
|
1 |
|
|
|
after 4 hrs. @
1200°C |
|
4 |
|
|
|
after 24 hrs. @
1200°C |
5 |
5 |
|
|
|
after 24 hrs. @
1400°C |
|
8 |
|
|
|
after 24 hrs. @
1500°C |
|
10 |
|
|
|
Thermal Expansion, in/in°C |
|
7x10-6 |
|
|
|
Softening Point, °C |
|
775 |
|
|
|
Arc Resistance, sec. |
360 |
|
|
|
|
Dielectric Strength, VPM |
530 |
|
|
|
|
Volume Resistivity, ohm-cm |
|
5x107 |
|
|
|
Thermal Conductivity, BTU/hr °F/in at mean
temp. = 600°C(estimated) |
|
|
4.5 |
|
|
3.8 |
1 Becomes rigid upon drying.
2 Can be made
moldable with addition of 10-20 wt% H2O.
3 Can be made
permanently rigid by heating to 300°C(570°F).
4 Depending on
humidity.
* Maximum Use Temperature is dependent on variables such as
stresses, both thermal and mechanical, and the chemical environment that
the sheet product experiences. Contact ZIRCAR Sales Office for more
information about the performance of these products in your
application.
AVAILABILITY
Please call ZIRCAR Sales Office
for Current Pricing.
|
ZRCI ITEM # |
DESCRIPTION |
|
JS01 |
RS-DA 18" X 24" X .020" |
|
JS02 |
RS-DA 18" X 24" X .040" |
|
JS03 |
RS-DA 18" X 24" X .080" |
|
JS04 |
RS-DA 18" X 24" X .120" |
|
JS05 |
RS-DA 36" X 48" X .020" |
|
JS06 |
RS-DA 36" X 48" X .040" |
|
JS07 |
RS-DA 36" X 48" X .080" |
|
JS08 |
RS-DA 36" X 48" X .120" |
|
JS20 |
RS-DM 18" X 24" X .020" |
|
JS21 |
RS-DM 18" X 24" X .040" |
|
JS22 |
RS-DM 18" X 24" X .080" |
|
JS23 |
RS-DM 18" X 24" X .120" |
|
JS24 |
RS-DM 36" X 48" X .020" |
|
JS25 |
RS-DM 36" X 48" X .040" |
|
JS26 |
RS-DM 36" X 48" X .080" |
|
JS27 |
RS-DM 36" X 48" X .120" |
|
JS50 |
RS-DD 18" X 24" X .020" |
|
JS51 |
RS-DD 18" X 24" X .040" |
|
JS52 |
RS-DD 18" X 24" X .080" |
|
JS53 |
RS-DD 18" X 24" X .120" |
|
JS54 |
RS-DD 36" X 48" X .020" |
|
JS55 |
RS-DD 36" X 48" X .040" |
|
JS56 |
RS-DD 36" X 48" X .080" |
|
JS57 |
RS-DD 36" X 48" X .120" |
|
JS70 |
RS-DR 18" X 24" X .020" |
|
JS71 |
RS-DR 18" X 24" X .040" |
|
JS72 |
RS-DR 18" X 24" X .080" |
|
JS73 |
RS-DR 18" X 24" X .120" |
|
JS74 |
RS-DR 36" X 48" X .020" |
|
JS75 |
RS-DR 36" X 48" X .040" |
|
JS76 |
RS-DR 36" X 48" X .080" |
|
JS77 |
RS-DR 36" X 48" X
.120" |
CUSTOM BOARDS AND SHAPES
- Our manufacturing process and machining
capabilities allow a wide variety of shapes to be made. Please contact
us with your special requirements.
|
