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Loose ZYBF Zirconia Fibre, heat-resisitant up to 2 300 °C
Loose zirconia fibres ZYBF exist in three different types. These fibres can withstand peak temperatures up to 2 300 °C and operating temperatures up to 2,200 °C depending on their form. These loose fibres are stabilised by 10 % of yttrium oxide. This polycrystalline material can then be moulded under vacuum into rigid elements, used in cavities as loose insulators or added as a reinforcement to coatings and ceramic parts.
For more information regarding the availability, refer to the technical data sheet.
Manufacturing of Loose Zirconia Fibre
All three ZYBF types are made using the original Zircar Process by Zircar Zirconia. This process uses microphagia to transforms an organic fibre into a ceramic fibre.
ZYBF is 6 to 10 µm in diameter, is nearly 100 % zirconia phase stabilised with 10 % yttria. The yttria stabilises the tetragonal / cubic structure by preventing the monoclinic to tetragonal crystal transformation that occurs at 1,170 °C in pure un-stabilised or insufficiently stabilised zirconia. This undesirable transformation causes an 11 % volume change in the crystal unit cell size that can cause micro-cracking and reduced physical strength in the bulk solid.
Yttria stabilised zirconia is an electrical semiconductor at high temperatures. This conductivity arises from the different valences of ionic Zr4+ and Y3+. Electricity is conducted at elevated temperatures (700 to 800 °C) as oxygen ions are induced to flow through the stabilised zirconia structure. This phenomenon forms the basis of zirconia oxygen sensors.
Main Applications of Loose Zirconia Fibres
- Rigid elements moulded under vacuum
- Reinforcement of ceramic parts
- Reinforcement of coatings
- Loose insulators in cavities
Benefits of Loose Zirconia Fibres
- Low thermal conductivity
- Temperature rating to as high as 2,200 °C
- Phase stabilised with 10 wt. % yttria
- High purity
- 100 % inorganic, no off-gassing or odors
- Excellent in corrosive, oxidising and reducing atmospheres
- Extremely low silica content
- Non-rcf, asbestos free
- Usable in multiple atmospheres
General Data on Loose Zirconia Fibres
Technical Data on Loose Zirconia Fibres
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.