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102.jpg (2192 bytes)  Alumina Bulk Fiber Type ALBF

albulk.gif (32645 bytes)GENERAL INFORMATION
ZIRCAR  Alumina Bulk Fiber Type ALBF is long aluminum oxide fibers suited for the vacuum forming of low density shapes or for use as packing or as a bulk fill material. It has useful properties to temperatures of 1800C (3272F).

This fiber exhibits light weight, low  thermal conductivity, low thermal mass and immunity to thermal shock. A minor addition of silica is made to the fiber modifying it's microcrystalline structure and acting as a grain growth inhibitor. This addition minimizes fiber embrittlement that usually occurs after extended use at elevated temperatures. ALBF's high alpha alumina content, purity & refractory nature resists attack in aggressive chemical environments. It is stable in vacuum, inert or reducing atmospheres. 

Silica, alumina and aluminum phosphate binders can be used to form rigid refractory thermal insulation products. When vacuum formed from a water slurry with the appropriate binder, a uniform body of ~0.16 gm/cm3 (10 pcf) density can be obtained. 

ALBF is useful as insulation packing in furnace spaces, around furnace sight tubes & ports and as fill in expansion joints and masonry cracks. They offer significant advantages over vitreous alumino-silicate fibers, including:
• High temperature dimensional stability
• Resilience and flexibility after exposure to elevated temperatures
• Exceptional refractoriness


CHARACTERISTICS & PROPERTIES

Composition, wt%

     Al2O3

97

     SiO2

3

     Organics

0

Alpha Alumina, wt%

>50

Color

White

Shot Content

Nil

Mean Fiber Diameter, microns

2.85

Fiber Length, cm

5 - 10

Fiber Density g/cc

4

Bulk Density, g/cc (pcf) 0.08 (5)
Packed Density Range, gm/cc (pcf) 0.1 - 0.19 (6-12)
Maximum Use Temp.*, C (F) 1700 (3092)

Melting Point, C (F)

2038 (3700)

Specific Heat, J/kg K (BTU/lb F)

1047 (0.25)

Linear Shrinkage, %  

   1 hr at 1538C (2800F)

2

   1 hr at 1650C (3002F)

4

Thermal Conductivity at 6 pcf packed density

*

Maximum use temperature is dependent on variables such as stresses, both thermal and mechanical, and the chemical environment that the material experiences.

SUGGESTED APPLICATIONS

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

Vacuum forming of low-density, high alumina fibrous ceramic materials for use to 1800C (3272F).

Additive in ceramic fiber containing vacuum formed products to improve refractoriness.

Furnace insulation packing around sight tubes, ports, expansion joints, and masonry cracks.

msds.jpg (1069 bytes)MATERIAL SAFETY DATA SHEETmsds.jpg (1069 bytes)

AVAILABILITY
STANDARD BULK FIBER

ITEM #

DESCRIPTION

PRICE*

SHIP WT. (lb.)

 

D3169

ALBF, 10 KG

$1216.00

26
 * 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-

Standard bulk fiber is available for immediate shipment from stock. 

Custom preparations, such as different total weight, controlled settled density and blends with other fibers are available on request. 

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 fiber: order online or specify quantity, item # and description.

Custom fiber: specify quantity, product type and description (by supplying drawings, sketches, written descriptions or material specifications).

Copyright 2001  ZIRCAR Ceramics, Inc.