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Zirconia Loose Fibres, up to 2,300 °C
Loose zirconia fibre ZYBF exists in three different types. Depending on their form, these fibres can withstand operating temperatures up to 2,200 °C and peak temperatures up to 2 300 °C. This polycrystalline material is stabilised by 10 % of yttrium oxide. Loose fibres can then be moulded under vacuum into rigid elements, used in cavities as loose insulators or added as a reinforcement to ceramic parts and coatings.
For more information regarding the availability, refer to the technical data sheet.
Manufacturing of Loose Zirconia Fibres
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 and 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.
Applications of Loose Zirconia Fibre
- Rigid elements moulded under vacuum
- Reinforcement of ceramic parts
- Reinforcement of coatings
- Loose insulators in cavities
Benefits of Loose Zircona Fibre
- 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 of Loose Zirconia Fibre
Technical Data of Loose Zirconia Fibre
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.