ZIRCAR Ceramics: ECO-27

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102.jpg (3709 bytes) Alumina-Silica Insulation Type ECO-27A & ECO-27B

GENERAL INFORMATION ZIRCAR Ceramics Alumina-Silica Insulation Types ECO-27A & ECO-27B are utility grades of ceramic fiber insulation board suitable for use to 1260°C (2300°C). Both are strong, rigid refractory structures of high temperature ceramic fibers, clay filler and high purity inorganic binders. ECO-27A contains a few percent organic binder and aids in room temperature handle-ability while ECO-27B which is organic free. Their high strength make them useful in load support applications such as experienced in refractory brick backup and large unsupported roof spans. They offer low thermal conductivity, excellent thermal shock resistance and are an effective thermal insulator in numerous thermal process systems.

CHARACTERISTICS & PROPERTIES

TYPE	ECO-27A	ECO-27B
Typical Composition, %
Al₂O₃	33	35
SiO₂	61	64
Other Metal Oxides, %	1
Organic Content, %	5	0
Bulk Density, gm/cc (pcf)	0.43 (27)	0.41 (26)
Specific Heat, BTU/lb°F (J/kg°K) @ 2000°F	0.284 (1190)
Color	Off White	Off White
Maximum Use Temp., °C (°F)	1260 (2300)
Linear Shrinkage^‡, %
24 hrs at 760°C (1400°F)	0.5
24 hrs at 1000°C (1832°F )	2.5**, 3.5^‡
24 hrs at 1200°C (2192°F)	4.0**, 6.0^‡
Loss On Ignition, %	5	0
Flexural Strength**, MOR at room temp., MPa (psi)
as received	1.98 (300)	1.15 (175)
24 hrs at 1260°C (2300°F)	0.82 (125)
Compressive Strength**, MPa (psi) at 10% compression	0.34 (50)	0.15 (22)
Thermal Conductivity,** W/mK (BTU/ft² °F/in)
200°C (392°F)	0.055 (.48)
600°C (1112°F)	0.13 (.98)
1000°C (1832°F)	0.23 (1.54)

*	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.

SUGGESTED APPLICATIONS

Primary thermal insulation in low mass furnaces and thermal process systems operating to 1260°C (2300°F).

Backup thermal insulation in furnaces and thermal process systems operating to high temperatures.

Expansion joints in gunned refractories

Furnace and kiln flue and chimney linings.

Combustion chamber liners, baffles and muffles.

High temperature setters, supports and process fixtures.

Electrical insulation in systems operating at elevated temperatures.

Thermal insulation in hot appliances.

Pouring forms for castables.

Non-ferrous metal caster tip and transport refractory

MATERIAL SAFETY DATA SHEET

AVAILABILITY

Boards are available on a custom basis and are typically produced in sizes up to 24" wide x 48" long x 1" to 2" thick. Custom boards and shapes smaller than a few cubic inches and larger than several cubic feet may be manufactured.

Custom boards, shapes and preparations are available on request. Custom machining, compositional variations and the application of surface rigidizers and hardening agents are also 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

Custom boards: specify quantity, product type and size. Example: 20ea, ECO-27A, 15.3"W x 35.5"L x 2"T

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