Zirconia Fibre Felts 2500°C

Zirconia felt Types ZYF are composed of 100%, 4-6 micron diameter, yttria-stabilized zirconia fibres which are mechanically interlocked. These zirconia felts are 100% inorganic fibres and contain no binders. They undergo no phase transitions on temperature cycling and are very effective thermal insulators, capable of use at temperatures up to 2000°C.

They are designed for use in extremely corrosive environments and high temperatures. These materials are equally useful in strong oxidizing and reducing environments. They are not reactive to alkali vapours, salts or strong hot solutions. The felts are not wet by most molten metals. They are easily cut to size.

Main properties of Zirconia Fibre Felts

  • Low thermal conductivity
  • High porosity
  • High purity
  • Extreme high temperature stability

Available thicknesses

  • 1.27mm – 0.05 inch
  • 2.54mm – 0.10 inch
  • 3.81mm – 0.15 inch
  • 4.06mm – 0.16 inch

Applications of Zirconia Fibre Felts

  • Thermal insulation in crystal growing applications
  • Electrolytic cell separator
  • Setter material
  • Diffusion burner membrane

Technical data

Properties

ZYF-50

ZYF-100

ZYF-150

ZYF-A2.13

ZYF-S.75G

Thickness, inch

mm

0.05 + 0.015

1.27 + 0.4

0.10 + 0.03

2.54 + 0.76

0.15 + 0.03

3.81 + 0.76

0.160 + 0.035

4.06 + 0.89

0.10 + 0.03

2.54 + 0.76

Bulk Porosity

96 %

95 %

94 %

94 %

88 %

Bulk Density lb/ft3

g/cm3

15

0.24

15

0.24

20

0.32

20

0.32

30

0.48

Tensile strength lb/inch width

g/cm

0.6

107

1.6

286

2.0

357

7.0

1250

1.7

304

Weight / Area

lb / ft²

g/m²

0.07

342

0.13

635

0.23

1123

0.21

1025

0.22

1074

Melting Point °F

°C

4700

2593

4700

2593

4700

2593

 

 

Compressive Strength psi @

10% Compression

3

3

5

13

13

Composition

 

 

 

 

 

Wt% ZrO2*+Y2O3

99+

99+

99+

97+

56+

Wt% Al2O3

<0.01

<0.01

<0.01

2+/-1

<0/01

Wt% SiO2

<0.02

<0.02

<0.02

<0.02

43

Minimum wrapping diameter before breaking

0.25 inch

6.35 mm

0.75 inch

19.05 mm

3 inches

76.20 mm

3 feet

914.40 mm

2 inches

50.80 mm

Specific Heat BTU / lb°F

J/KgK

 

 

 

 

 

@ 200°F

93°C

0.13

544

0.13

544

0.13

544

 

 

@ 4300°F

2371°C

0.18

754

0.18

754

0.18

754

 

 

Vapour Pressure @ 2500°F (1371°C)

8 x 10-12 Torr

8 x 10-12 Torr

8 x 10-12 Torr

 

 

%Shrinkage after 1 hr.@ 3000°F (1649°C) isothermal soak

5

4

4

1.5

5

*1 - 2 wt% hafnia occurs naturally with zirconia and does not affect performance.

Zirconia Felts (693.75k)

Technical data sheet: zirconia fibre felts.


Felts and Blankets HT° (1.13M)

Technical data sheet: our range of high temperature nonwoven felts and blankets.