ZIRCAR Ceramics: AB & MB

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102.jpg (2192 bytes) Alumina Blanket Type AB & MB

GENERAL INFORMATION Alumina Blanket MB and AB

ZIRCAR Alumina Blanket Type AB & Type MB are low density flexible quilted blankets made from shot free high purity alumina fiber. The fibers in them are of high chemical purity. Stitched together with ceramic yarn these flexible and resilient blankets are easily cut and applied to numerous application with temperatures as high as 1600°C (2912°F).

The high purity aluminum oxide fibers exhibit light weight, low thermal conductivity, low thermal mass and immunity to thermal shock. A minor addition of silica in AB modifies the fiber's microcrystalline structure and acts as a grain growth to prevent embrittlement that usually occurs after extended use at elevated temperatures. The silica content in MB promotes the formation of the mullite structure providing stability at elevated temperatures. These blankets resist attack in aggressive chemical environments due to their high purity & refractory nature.

AB and MB are ideal for use when layered between rigid insulation, wrapped around process piping or fabricated into folded modules. They are also useful as insulation packing in furnace spaces, around furnace sight tubes & ports and fill in expansion joints and masonry cracks.

Alumina Mat offers significant advantages over vitreous alumino-silicate fiber blankets, including:
• High temperature dimensional stability
• Resilience and flexibility after exposure to elevated temperatures
• Exceptional refractoriness

CHARACTERISTICS & PROPERTIES

TYPE		MB	AB
Nominal Composition, wt.% of fiber ^†
Al₂O₃		80	95
SiO₂		20	5
α Al₂O₃		5 maximum	30 to 50
Mullite		50 to 70	5 to 16
Al₂O₃ + SiO₂		99.7 minimum
Fe₂O₃		0.2 maximum
Loss on Ignition, wt.%		0.3 maximum
Average Fiber Diameter, µm		2 to 4
Shot Content, (% ≥ 100µm)		2 maximum
Density, g/cc (pcf)		0.1 (6.24)
Color		White
Maximum Use Temperature*, °C (°F)		1600 (2912)
Linear Shrinkage^‡, % after 24 hrs at 1500°C (2732°F))	Width and Length	≤1
	Thickness	≤3
Thermal Conductivity**, ASTM C177-76, W/m°K (BTU/hr ft² °F/in)
315°C (599°F)		0.07 (0.50)
540°C (1000°F)		0.09 (0.70)
760°C (1400°F)		0.13 (0.90)
980°C (1796°F)		0.17 (1.25)
1200°C (2192°F)		0.23 (1.60)
1425°C (2597°F)		0.30 (2.15)
Tensile Strength^‡, kg/cm²		0.2 minimum
Compressibility, (%)		5 minimum
Resiliency, (%)		5 minimum

*-	Maximum use temperature is dependent on variables such as stresses, both thermal and chemical, and the chemical environment that the material experiences.
**-	Properties expressed parallel to thickness.
^‡-	Properties expressed perpendicular to thickness.
^†-	Yarn is comprised of 70% Al₂O₃ and 30% SiO₂.

SUGGESTED APPLICATIONS

Primary thermal insulation in low mass furnaces and thermal process systems operating to 1600°C (2912°F).

Backup thermal insulation in furnaces, solid oxide fuel cells and thermal process systems operating to high temperatures.

General high temperature furnace repair.

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

MATERIAL SAFETY DATA SHEET

AVAILABILITY

STANDARD BLANKET

ITEM #	DESCRIPTION	PRICE*	SHIP WT. (lb.)
D3010	MB, 620mm x 450mm x 25mm, SHEET	$162.00	7
D3020	MB, 620mm x 1800mm x 25mm, ROLL	$519.00	10
D3030	MB, 620mm x 7200mm x 25mm, ROLL	$1433.00	35
D3040	AB, 620mm x 450mm x 25mm, SHEET	$156.00	7
D3050	AB, 620mm x 1800mm x 25mm, ROLL	$495.00	10
D3060	AB, 620mm x 7200mm x 25mm, ROLL	$1363.00	35
* 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 items are available for immediate shipment from stock.

Custom sizes, chemistries and preparations 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 blanket: order online or specify quantity, item # and description.

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