ZYK-15 Zirconia Fibre Knit Cloth 2,200°C

ZYK-15 Zirconium Oxide Fibre Knitted Cloths, up to 2,200 °C

Zirconium oxide cloth ZYK-15 is made using the original Zircar Process by Zircar Zirconia, and is comprised of continuous individual filaments fabricated in a tricot knit form that is nearly 100 % zirconia phase stabilized with 10 % yttria.

ZYK-15 is suitable for applications such as high energy battery separators, thermal insulation in crystal growing furnaces, and for the filtration of hot gasses. 

Applications of Zirconium Oxide Knitted Cloths

  • Separators in nickel batteries
  • High temperature insulation
  • Heat shielding
  • Reinforcement for ablative materials
  • Filter media for hot gasses
  • Catalyst supports
  • Corrosion resistant wrapping
  • Flexible setter cloths at elevated temperatures

Benefits of Zirconium Oxide Knitted Cloths

  • Lowest thermal conductivity among similar products
  • High purity
  • Peak temperature at 2,200 °C
  • No off-gassing 
  • Excellent in corrosive, oxidizing & reducing atmospheres 
  • Flexible to 1,350 °C 
  • High porosity

General Characteristics of Zirconium Oxide Knitted Cloths

Thermal Characteristics

Zirconium oxide cloth can withstand extreme temperatures in excess of 2,200 °C and as high as 2,590 °C (melting point). It offers the lowest thermal conductivity among all similar products available on the market.

Tensile Strength 

Elongation of 4 to 8 % before breaking allows ZYK-15 to conform to irregular sizes.

Compressive Strength

ZYK-15 can be compressed up to two-thirds of its normal thickness and still recover a major fraction of its original dimension with little fiber damage.

Chemical Characteristics

Zirconium oxide Cloth Type ZYK-15 has exceptional resistance to molten alkali metal chlorides and carbonates at temperatures as high as 700 °C and to aqueous solutions of alkali metal hydroxides at temperatures as high as 230 °C. 

These materials will tolerate exposure to a mineral acid at its boiling point for short lengths of time. Extensive contact with hot phosphoric acid, however, causes embrittlement and stiffening due to the formation of zirconium phosphate. 

Molten metals such as copper, aluminum, iron steel, etc., do not wet and therefore cause little change in either the chemical or the physical nature of these products in spite of many hours of exposure. 

The fine capillary and pore structure of ZYK-15, in combination with the hydrophilic nature of zirconia and the serrated surface of the individual fibers in the knit threads, impart excellent wetting solution retention and wicking characteristics to this material. 

Technical Data of Zirconium Oxide Knitted Cloths





Wt. % 

ZrO2*: 90

Y2O3: 10

Trace Impurities: < 0.25




Bulk Porosity



Bulk Density



Tensile Strength



Area Density



Melting Point 



Max. Peak Temperature**



Specific Heat Capacity at 93 °C



Specific Heat Capacity at 2,371 °C



Saturation Vapor Pressure at 1,371 °C



after1 hr at 1,679 °C



*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.

Item N° and Available Size of Zirconium Oxide Knitted Cloths

Zircar Item N° 

Final Item N° 


Dimensions (mm)




457 x 610

ZYK zirconia cloth is only available as sheet.

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.

Zirconia Knitted Cloth (167.49k)

Data Sheet: Zirconia Knitted Cloth

Zirconium Oxide Fibre (326.87k)

Technical datasheet: Zirconium Oxide Fibre