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  Alumina Insulation Type ZAL-45 & ZAL-45AA

GENERAL INFORMATION
ZIRCAR Alumina Insulations Types ZAL-45 and ZAL-45AA "All-Alumina" boards are high strength, uniform, rigid, refractory structures composed of alumina fibers and high purity  inorganic binders. Both have an optimum fiber density of 45 lbs/ft³ (0.72 gm/cc),  fine open pore structure and excellent thermal insulating properties. Type ZAL-45 has superior hot strength and dimensional stability to 1650°C (3000°F) and withstands intermittent use to 1700°C (3192°F). Type ZAL-45AA has superior resistance to chemical attack and dimensional stability to 1550°C (2822°F).

The homogeneous microstructure and consistent binder distribution allow these materials to be machined to tight exacting tolerances with ordinary shop tools and equipment. Their superior machineability and dimensional stability plus low heat capacity make them ideal for use as setters, supports and process fixtures in both continuous and batch firing furnaces.

High purity silica is the binder in Type ZAL-45. Silica's strong bond gives ZAL-45 excellent high temperature strength and dimensional stability. Type ZAL-45AA "All Alumina" has a high purity alumina bond making it well suited to use in high vacuum and reducing atmosphere applications where silica cannot be tolerated, such as in bright annealing furnaces with H₂ atmospheres. For more information see "Effects of Hydrogen Gas at 1450°C on Select Fibrous Alumina Insulation Products." They both have high electrical resistivity at elevated temperatures allowing them to be used in direct contact with many different resistance heating elements.

Type ZAL-45 and ZAL-45AA products are pre-fired, contain no organic binders and will produce no smoke or odors when heated. They show excellent resistance to chemical attack and are not affected by  oil or water. They are, however, affected by hydrofluoric acid, phosphorous acid and strong alkalis. 

CHARACTERISTICS & PROPERTIES

Load Orientation
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Load Applied Normal To Fiber Plane	Load Applied Parallel To Fiber Plane	Load Applied Normal To Fiber Plane	Load Applied Parallel To Fiber Plane
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ZAL-45

Primary thermal insulation in low mass furnaces and thermal process systems operating to 1650°C (3002°F)

Thermal insulation, supports and process fixtures in Hot Isostatic Presses (HIP) furnaces and other thermal process systems operating to 1650°C (3002°F).

Launders, distribution boxes, pouring spouts, hot tops and others involving molten metal contact.

High temperature setters, supports and process fixtures.

Electrical insulation in high temperature systems operating to 1650°C (3002°F).

ZAL-45AA

Thermal insulation in bright annealing furnaces and other thermal process systems with hydrogen gas atmospheres operating to 1550°C (2822°F).

Thermal insulation, supports and fixtures Solid Oxide Fuel Cells operating to 1550°C (2822°F).

Backup thermal insulation in furnaces and thermal process systems operating to temperatures exceeding 2000°C (3632°F).

Launders, distribution boxes, pouring spouts, hot tops and others involving molten metal contact.

Electrical insulation in high temperature systems operating to 1550°C (2822°F).

MATERIAL SAFETY DATA SHEET

AVAILABILITY

STANDARD  BOARDS

Custom boards, 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 and custom-machined shapes and others can be fabricated. Tight tolerance machining, compositional variations and the application of surface rigidizers and hardening agents are available.

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, ZAL45-AA, 22in.W x 31.5in.L x 1.5in.T

Copyright © 2002  ZIRCAR Ceramics, Inc.