| REFRACTORY SHEET TYPE RS-A1, RS-A2 and RS-A3 |
|
GENERAL INFORMATION
|
ZIRCAR
Refractory Sheet Type RS-A is a tough ceramic fiber reinforced composite
material available in standard boards and custom shapes made to customer
specifications.
These products
are made from Type RS-A Moldable. Type RS-A was developed as
an asbestos board replacement for induction coil liners and molten metal
transport, and contains no asbestos. Refractory Sheet Type RS-A is ideally
suited for a wide range of high temperature, high thermal shock
applications.
Type RS-A
contains no organic binders and will produce no smoke or odors when
heated.
Type RS-A
products are available in 3 varieties: Type RS-A1 is dried to constant weight at
100캜(212캟). These products can be remoistened to impart moldablity. Type RS-A2
is fired for 3 hour at 600캜(1112캟) and fully cured. Type RS-A3 is fired,
hardened with ZRCI AL-Hard at 5% pickup, and re fired. They are substantially
higher in density than other ceramic fiber based moldable derived
products.
|
| SUGGESTED APPLICATIONS
Induction Furnace components such as:
channel melter components, coil liners, coreless induction components, splash
and coil shields.
Non-ferrous metal handling and transport
as: spouts, troughs, and casting tips.
Brazing separators and fixtures for
jewelry-making as well as other industrial applications. The high
Al2O3 content makes it resistant to sticking in many
environments including molten metals.
Ideal as high temperature gasketing
material.
CHARACTERISTICS &
PROPERTIES
| Typical Composition, % |
|
|
Al2O3 |
90 |
| SiO2 |
10 |
| Color |
White |
| Organic Content, % |
0 |
| Specific Heat, BTU/lb?/sup>F
(J/kg?/sup>K) |
0.25(1047) |
| Maximum Use Temp* C(F) |
1450(2642) |
| Thermal Conductivity,**
(estimate) |
|
| W/m?/sup>K(BTU/hr
ft2 ?/sup>F/in) |
0.65(4.5) |
|
TYPE |
Type A1 |
Type A2 |
Type A3 |
|
Density,
gm/cm3(lb/ft3) |
1.6(100) |
1.6(100) |
1.7(105) |
|
Porosity, % |
40 |
40 |
38 |
|
Modulus of Rupture,** MPa(psi)
at room temperature |
3.4(500) |
3.9(560) |
9.1(1330) |
|
Compressive Strength,** MPa(psi) at 10% deflection |
6.9(1000) |
9.7(1400) |
17.2(2500) |
|
Hardness, Durometer "D" |
50 |
55 |
70 |
|
Pullout Strength |
|
|
|
|
(lbs on #10 sheet metal
screws) |
30 |
50 |
90 |
|
Moisture Content, % |
10 |
10 |
2 |
|
Linear Shrinkage?/font>,16 hrs soak at
1200?/sup>C(2192?/sup>F) |
4 |
0 |
0 |
* 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. |
