Share this page by mail ZYFB Zirconium Oxide Composite
Overview: ZYFB Zirconium Oxide Composite
Zirconium oxide boards types ZYFB-3 & ZYFB-6 are rigid refractory structures composed of ZYBF bulk fibres which are nearly 100 % zirconia phase stabilized with yttria. These ceramics have high insulating properties that excel at extremely high temperatures and in severe environments such as corrosive, oxidizing and reducing atmospheres.
Fibres used to manufacture these ZYBF-3 and ZYBF-6 products undergo multiple processing and heat treatments. They have a good dimensional stability up to 1,650 °C and can be used as insulation in fused quartz processing, heat shield and setter for loads up to twice its weight at temperature up to 1,400 °C.
ZYBF composites are machinable with traditional tools
Applications of ZYFB Zirconium Oxide Composite
- High temperature insulation
- Zone separator in directional solidification furnaces
Available ZYFB Zirconium Oxide Composite
ZYBF boards and cylinders are available at two different densities:
• ZYFB-3 is our lowest density product at 0.48 g/cm3 and benefits of an extremely low thermal conductivity.
Usual Applications: hot face insulation in fused quartz processing, zone separator in directional solidification furnaces used to manufacture jet turbine blades.
• ZYFB-6 is medium density product at 0.96 g/cm3 and has a better mechanical strength than ZYBF-3 products.
Usual Applications: IR source insulation in FTIR spectrometer, insulation in nuclear meltdown experiments.
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ZYFB-3 & ZYFB-6 |
Dimensions |
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Square Board |
from 152.4 x 152.4 x 6.4 mm |
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from 304.8 x 304.8 x 6.4 mm |
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The dimensions depend on the article number. |
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Technical Data of ZYFB Zirconium Oxide Composite
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Property |
Unit |
ZYFB-3 |
ZYFB-6 |
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Composition |
ZrO2* |
Wt. % |
90 |
90 |
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Y2O3 |
10 |
10 |
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Typical Impurities |
HfO2 |
Wt. % |
1 to 2 |
1 to 2 |
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SiO2 |
0.12 |
0.12 |
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TiO2 |
0.14 |
0.14 |
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CaO |
0.09 |
0.09 |
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MgO |
0.03 |
0.03 |
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Fe2O3 |
0.04 |
0.04 |
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Al2O3 |
0.01 |
0.01 |
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Na2O |
0.01 |
0.01 |
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Colour |
white |
white |
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Bulk Density |
g/cm3 |
0.48 |
0.96 |
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Porosity |
% |
92 |
84 |
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Operating Temperature** |
°C |
1,800 |
1,800 |
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Peak Temperature |
°C |
2,200 |
2,200 |
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Melting Point |
°C |
2,590 |
2,590 |
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Flexural Strength |
MPa |
0.60 |
2.10 |
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Compressive Strength at 10 % compression |
MPa |
0.29 |
1.59 |
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Outgassing in Vacuum |
None |
None |
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Dilatometric Softening Temperature at 10 psi |
°C |
1,180 |
1,240 |
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*1-2 % weight hafnia (HfO2) occurs naturally with zirconia (ZrO2) and does not affect performance.
**Maximum use temperature is dependent of variables such as chemical environment and stresses; both thermal and mechanical.
Physical variables included in this documentation are provided by way of indication only and do not, under any circumstances, constitute a contractual undertaking. Please contact our technical service if you require any additional information.
FAQs that can help you in this category
Calcium silicate boards have a low density (200–1,000 kg/m³), low thermal conductivity (~ 0.05–0.35 W/m·K) and high temperature resistance of up to 1,000°C. They are used as structural insulators.
Mica boards (phlogopite or muscovite) have great dielectric strength (>20 kV/mm) and temperature resistance up to 500–1,000°C, depending on the type. It must be permanently compressed between 2 other boards to preserve its mechanical integrity (the silicon binder degrades at high temperature). Use of mica composite requires particular attention: please contact Final Advanced Materials for more information.
Yes, the inorganic composites produced by Final Advanced Materials can be CNC machined. Machining of calcium silicate-based (CaSiO₃) refractories or derived materials of the insulating boards type involves specific aspects relating to their low density, high porosity and low mechanical cohesion. Although these composites are not hard, they pose a high risk of scaling and crumbling: loads must therefore be minimised, and stripping of material must be avoided. The resulting powder is very abrasive and it is therefore essential that a dust extraction system is installed on your machinery. We can machine these materials in our production shop.
For continuous use at 1,000°C, Final Advanced Materials recommends composites made of ceramic fibres or calcium silicate. These materials have a low thermal conductivity (~0.08–0.35 W/m·K) and high dimensional stability. Nanoporous composites can go as low as 0.02–0.04 W/m·K but are more mechanically fragile. The choice depends on your requirements: thermal insulation or mechanical resistance. We require a complete description of the application and of the stresses before we can recommend the most suitable product.
Final Advanced Materials' high-temperature composite panels have resistances ranging from 1 to 40 MPa when compressed, depending on the density.
Light insulating materials (fibres and microporous materials) are limited (~1–5 MPa), while denser composites (reinforced silicate, zirconia) can resist up to 10–20 MPa and even as high as 40 MPa in the case of a calcium silicate with a density of 1,300 kg/m3.
Specifically: all inorganic composites which are capable of withstanding exposure to high temperatures (>300°C) have no elasticity and are therefore quite fragile.