Zirconia fibres board 2200°C

Zirconia fibres board  2200°C

Zirconia fibres products have high temperatures strength and a high resistance against chemical agents. Zirconia fibre has the lowest thermal conductivity of any refractory fibrous products available on the market. The maximum use temperature is 2200°C and the melting begins at 2500°C (depending on the products).

The fabrics are constructed of continuous individual filaments and don’t require organic binders.

High sensity board, dics and tube

Type FBD Boards, Discs and Tubes are high strength, uniform, rigid, refractory structures composed of zirconia fibres stabilized with yttria. Type FBD is Zircar Zirconia's strongest and most stable zirconia material. Type FBD is ideally suited for thermal insulation and protection applications under conditions of ultra-high temperatures and in varied atmospheres. FBD has been high fired and is tightly bonded resulting in nearly dust free use. This tight bonding makes machining to tight tolerances possible.

FBD is dimensionally stable to 2000°C and can be used at higher temperatures in areas where some sintering can be tolerated. FBD has good hot strength up to 1700°C and can be used as a self-supporting setter for loads equal to twice its own weight up to this temperature.

This product is machinable.

Applications

  • FBD is used as self-supporting insulation in industrial furnaces operating up to 1700°C and as supported and back-up insulation in systems operating at much higher temperatures.

  • FBD is used as protection sleeving in zirconia Oxygen / Carbon sensors.

  • FBD insulation has been successfully used in Nuclear Meltdown Experiments.

Technical Specifications

FBD

Bulk Density, g/cm3 (lb/ft3)3 (lb/ft3)

1.4 (90)

Porosity, %

76

Melting Point, °C (°F)

2590 (4694)

Flexural Strength, (Parallel to thickness) MPa (psi)

8.27 (1200)

Compressive Strength, (Parallel to thickness)

to 10% Compression MPa (psi)

5.52 (800)

Outgassing in Vacuum

Nil

Dilatometric Softening Temperature, °C (°F) at 10 psi

1400 (2552)

Thermal Expansion Coefficient (Perpendicular to Thickness) Room Temperature to 1180°C (2156°F)

10.7 x 10-6/°C (6 x10-6/°F)

Linear Shrinkage (Perpendicular to Thickness) , %

1 hour at 1650°C (3002°F)

0.0

24 hours. at 1650°C (3002°F)

0.9

1/2 hour at 2000ºC (3632°F)

2

Thermal Conductivity, (Parallel to thickness)

W/mK (BTU/h ft2 °F/pouce) at 400°C (752°F)

0.24 (1.7)

W/mK (BTU/h ft2 °F/pouce) at 800°C (1472°F)

0.26 (1.9)

W/mK (BTU/h ft2 °F/pouce) at 1100°C (2012°F)

0.31 (2.1)

W/mK (BTU/h ft2 °F/pouce) at 1400°C (2552°F)

0.33 (2.3)

W/mK (BTU/h ft2 °F/pouce) at 1650°C (3002°F)

0.35 (2.5)

Board, dics and tube

Type ZYFB Boards, Discs and Tubes are rigid, refractory structures composed of yttria-stabilized zirconia fibres. Type ZYFB is ideally suited for thermal insulation applications under conditions of ultra-high temperatures and in a variety of severe environments.

ZYFB is fired at a high temperature to impart good dimensional stability up to 1650°C and can be used at higher temperatures where some additional sintering can be tolerated. It has good hot strength up to 1400°C and can be used as a self-supporting setter for loads equal to twice its own weight up to this temperature.

ZYFB is available in two densities. ZYFB-3 has a bulk density of 0.48 g/cm3 (30 lb/ft3) and possesses extremely low thermal conductivity. ZYFB-6 has a bulk density of 0.96 g/cm3 (60 lb/ft3) and is stronger than ZYFB-3.

ZYFB is machinable.

Applications

  • ZYFB is used as a high temperature, machinable hot face insulation in glass melting furnaces.

  • ZYFB is used as high temperature heat shielding. It can replace or reduce the number of conventional refractory metal shields needed in many vacuum furnace applications and is not restricted to non-oxidizing conditions.

  • ZYFB is used as insulation in directional solidification furnaces for jet turbine blades.

  • ZYFB Boards and Discs are excellent setter and fixturing materials.

  • ZYFB's ready machinability, dimensional stability and low heat capacity favor its use as a setter in both continuous and batch processes.

Technical Specifications

ZYFB-3

ZYFB-6

Bulk Density,, g/cm3 (lb/ft3)

0,48 (30)

0,96 (60)

Porosity, %

92

84

Melting Point, °C (°F)

2590 (4694)

2590 (4694)

Flexural Strength, (Parallel to thickness) MPa (psi)

0,60 (85)

2.10 (300)

Compressive Strength, (Parallel to thickness)

to 10% Compression MPa (psi

0.29 (42)

1.59 (230)

Outgassing in Vacuum

Nil

Nil

Dilatometric Softening Temperature, °C (°F) at 10 psi

1180 (2156)

1240 (2264)

Thermal Expansion Coefficient (Perpendicular to Thickness) Room Temperature to 1180°C (2156°F)

10.7 x 10-6/°C

(6 x 10-6/°F)

10,7 x 10-6/°C

(6 x 10-6/°F)

Linear Shrinkage

(Perpendicular to Thickness) ,%

1 hour at 1650°C (3002°F)

1.2

1.0

24 hours at 1650°C (3002°F)

2.8

1.7

Thermal Conductivity,

(Parallel to thickness)

W/mK (BTU/h ft2 °F/pouce) at 400°C (752°F)

0.08 (0,6)

0.16 (1,2)

W/mK (BTU/h ft2 °F/pouce) at 800°C (1472°F)

0.11 (0.8)

0.19 (1.3)

W/mK (BTU/h ft2 °F/pouce) at 1100°C (2012°F)

0.14 (1,0)

0.22 (1,5)

W/mK (BTU/h ft2 °F/pouce) at 1400°C (2552°F)

0.19 (1.3)

0.25 (1.7)

W/mK (BTU/h ft2 °F/pouce) at 1650°C (3002°F)

0.24 (1.7)

0.27 (1.9)

Zirconia fibres (497.40k)

Technical datasheet