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Alumina Insulation Type SALI
GENERAL INFORMATION
ZIRCAR Alumina Insulation Type SALI has been insulating furnaces longer than any
rigid alumina fiber insulation product available today.
SALI is a high strength, low density, rigid refractory structure fabricated from alumina fibers tightly bonded into an alumina matrix. SALI is prefired, contain no organics and possesses a continuous maximum use temperature of 1720°C (3128°F). These features make it an ideal insulation material for use as hot face insulation in a host of industrial and laboratory furnaces and thermal process systems.
Its fine open pore structure enables SALI to be cut to precision tolerances. SALI shows excellent resistance to chemical attack and is not affected by oil or water. It is however affected by hydrofluoric acid, phosphoric acids and strong alkalis.
The technical papers "1700°C Rapid Cycle Furnace Design" and "Design of Low Mass Furnaces for High Temperatures" describe the make-up and some of the uses of this versatile material.
CHARACTERISTICS & PROPERTIES
Typical Composition, % |
|
Al2O3 |
80 |
SiO2 |
20 |
Moisture & Organic Content |
0 |
Bond |
Silica |
Density, gm/cm³ (lbs/ft³) |
0.48 (30) |
Open Porosity, % |
84 |
Maximum Use Temp.*, °C (°F) |
1700 (3092) |
Melting Point, °C (°F) |
1870 (3392) |
Color |
White |
Linear Shrinkage‡, % |
|
24 hrs at 1650°C (3002°F) |
1 |
24 hrs at 1700°C (3092°F) |
3 |
Flexural Strength**,MPa (psi) |
2.07 (300) |
Compressive Strength**, MPa (psi) at 10% Compression |
1.31 (190) |
Thermal Conductivity,** ASTM C177-76 W/m°K (BTU/hr ft² °F/in) |
|
400°C (752°F) |
0.20 (1.3) |
525°C (977°F) |
0.25 (1.7) |
800°C (1472°F) |
0.31 (2.1) |
1100°C (2012°F) |
0.34 (2.4) |
| 1400°C (2552°F) |
0.39 (2.9) |
Specific Heat, BTU/lb°F (J/kg°K) |
0.25 (1047) |
SAG/Distortion, 6in. (152mm) x 1in. (25.4mm) x 1in. (25.4mm), 5in. (127mm) Span, % after 24 hrs. at 1650°C (3002°F) |
2 |
Coefficient of Thermal Expansion (CTE)‡,ª, Room Temperature to 1100°C (1832°F), x 10-6/°C (10-6/°F) |
8.0 (4.5) |
Softening Temperature8, °C (°F) |
1100 (2012) |
| * | 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. |
| ª | CTE per ASTM C-372, 0.5 psi load on 1/2in. square sample, 3°C/min. heating / cooling rate, air atmosphere. |
| 8 | Temperature sample yields under load of push rod in CTE determination |
SUGGESTED APPLICATIONS
Primary thermal insulation in low mass furnaces and thermal process systems operating to 1720°C (3128°F).
Backup thermal insulation in furnaces and thermal process systems operating to temperatures exceeding 2000°C (3632°F).
High temperature setters, supports and process fixtures.
Electrical insulation in high temperature systems operating to 1700°C (3092°F).
AVAILABILITY
STANDARD BOARDS
| ITEM # |
DESCRIPTION |
PRICE* |
SHIP WT. (lb.) |
||
| A18011 | SALI, 18in.W x 24in.L x 0.50in.T | $443.00 | 9 | ||
| A18012 | SALI, 18in.W x 24in.L x 0.75in.T | $576.00 | 10 | ||
| A18013 | SALI, 18in.W x 24in.L x 1.00in.T | $658.00 | 12 | ||
| A18014 | SALI, 18in.W x 24in.L x 1.50in.T | $894.00 | 15 | ||
| A18015 | SALI, 18in.W x 24in.L x 2.00in.T | $1163.00 | 18 | ||
| * Note: Prices shown apply to sales within the United States. Contact us for information regarding international commerce. | |||||
| To place your order, please click the respective "ORDER" button next to the item you wish to purchase. To view your shopping cart click the button to the right. For more info -click here- | |||||
Boards are typically produced 18in. wide x 24in. long x ½ to 2in. thick. Custom boards and shapes smaller than a few cubic inches and larger than a cubic foot in volume have been produced.
Cylinders typically produced have 1in. to 12in.ID, ½in. to 2in. wall thickness and are up to 20in. long. Typical tolerances are +/- 1/16in. on diameters and +/- 1/8in. on length. Custom cylinders and shapes smaller than a few cubic inches or larger than several cubic feet, weighing over 50 pounds, with ID’s of ¼in. to 24in., wall thickness of 1/8in. to 3in. and lengths to 48in. have been produced.
Large boards, cylinders and shapes have been produced via a proprietary molding / joining process.
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Please contact us with your special requirements. We are pleased to contact you if you would like more information or want to discuss custom product availability and pricing.
To Order
Standard boards: order online or specify quantity, item # and description.
Custom boards: specify quantity, product type and size. Example: 24ea, SALI, 12in.W x 18in.L x 1in.T
Custom cylinders: specify quantity, product type and size. Example: 24ea, SALI, 8.9in.ID x 11in.OD x 20in.L
Custom boards, cylinders, shapes and preparations: specify quantity, product type and description (by supplying drawings, sketches, written descriptions or material specifications).
Copyright © 2006 ZIRCAR Ceramics, Inc.
Custom boards, cylinders,
shapes and preparations are available on request. Our forming processes, large inventory
of custom tooling and state of the art machining techniques allow a wide variety of sizes
and shapes to be made. Special geometries such as disks, rings, custom bore (round corner
square, hexagonal, oval, etc.) cylinders, staved cylinders, troughs, channel, angle,
custom-machined shapes and others can be fabricated. Machining to tight tolerance,
compositional variations and the application of surface rigidizers and hardening agents
are available.