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Zircar Zirconia ZYBF-3 Zirconia Bulk Fiber Insulation

Category Ceramic , Machinable Ceramic , Oxide , Zirconium Oxide
Manufacturer Zircar Zirconia
Trade Name
Port Shanghai port,China
Trade Terms FOB, CFR, CIF
Payment Terms L/C, T/T, Western Union
Download PDF Zircar Zirconia ZYBF-3 Zirconia Bulk Fiber Insulation.pdf
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Material Notes:
Zirconia Bulk Fibers Type ZYBF are yttria stabilized zirconia fibers available in five different forms, all having useful properties up to 2200°C. These polycrystalline fibers can be vacuum formed into rigid shapes, placed into cavities as loose fill insulation, or added to ceramic bodies and coatings for reinforcement. They are differentiated by fiber length, surface area, crystallite size and porosity. However, they all share the same fiber diameter and calcined chemical composition. All five forms of ZYBF are made using the “Zircar Process” which replicates the gross physical structure of an organic precursor fiber with a ceramic. Typically these fibers are 6 to10 microns in diameter and have a serrated outside surface. All of our Zirconia Bulk Fibers are phase stabilized with ~10% yttria (yttrium oxide - Y2O3) to maintain a stable tetragonal / cubic structure. The yttria, in a solid solution within the zirconia, stabilizes the tetragonal / cubic structure by preventing the monoclinic to tetragonal crystal transformation that occurs at 1170°C in pure un-stabilized or insufficiently stabilized 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 stabilized zirconia is an electrical semiconductor at elevated temperatures. This conductivity arises from the different valences of ionic Zr+4 and Y+3. Electricity is conducted at elevated temperatures (~700-800°C) as oxygen ions are induced to flow through the stabilized zirconia structure. This phenomenon forms the basis of zirconia oxygen sensors.Features: Available in Five Different FormsLow Thermal ConductivityHighly RefractoryLow Heat StorageExtreme High Temperature StabilityFibers Stabilized with ~10 wt% YttriaLightweightAvailable “Off the Shelf”Information provided by Zircar Zirconia.
Physical Properties Metric English Comments
Bulk Density 0.420 g/cc
0.0152 lb/in³
Loss On Ignition 0.100 - 0.400 %

@Temperature 950 °C,
Time 1800 sec
0.100 - 0.400 %

@Temperature 1740 °F,
Time 0.500 hour
Specific Surface Area 0.40 m²/g
0.40 m²/g
Pore Size 0.00360 microns
0.000142 mil
Median Pierce desorption mesopore, based on surface area
0.00430 microns
0.000169 mil
Median Pierce adsorption mesopore, based on surface area
0.0280 microns
0.00110 mil
Median Pierce desorption mesopore, based on pore volume
0.170 microns
0.00669 mil
Median Pierce adsorption mesopore, based on pore volume
Component Elements Properties Metric English Comments
Chlorine, Cl <= 0.10 %
<= 0.10 %
H2O 0.050 - 0.20 %
0.050 - 0.20 %
HfO2 1.0 - 2.0 %
1.0 - 2.0 %
Y2O3 10 %
10 %
ZrO2 88 - 89 %
88 - 89 %
Descriptive Properties Value Comments
Trace Impurities <1%
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