Pure Zirconia Fibers and Textiles




  • High Purity Zirconia
  • High Temperature Stability
  • Low Thermal Conductivity
  • Excellent Thermal Shock Resistance
  • No Outgassing
  • Six Different Product Formats Offered
  • Available ‘Off the Shelf’

Zircar’s unique process for manufacturing yttria-stabilized zirconia cloths and felts is also
used in the production of pure zirconia refractory fibers and textiles without stabilizers. For
those processes which are intolerant of yttria, these unstabilized pure zirconia fiber products
provide much of the same high performance insulating benefits. Pure zirconia fibers
exist in the monoclinic crystal phase and appear white in color. Our high purity zirconia fiber
and textiles are offered in six different standard product forms; bulk fiber Type ZOBF,
two felts Types ZOF-50 and ZOF-100 and three types of knit cloth Types ZOK-15, ZOW-15
and ZOW-30.


Pure zirconia cloth is used as high temperature insulation for advanced energy systems.


Composition, Wt% ZrO2 * 99+
Composition, Wt% SiO2 0.22
Composition, Wt% CaO 0.04
Composition, Wt% Na2O 0.02
Melting Point °C (°F) 2590 (4694)
Loss on Ignition, 1 hr at 950°C (1742°F), Wt% 0.34
Outgassing Nil
% Shrinkage, 1 hour at 1650°C (3002°F) 0

* 1-2 % hafnia occurs naturally with zirconia and does not affect performance.


Pure Zirconia fiber products are available in six product forms, which are listed in the table
below with their ordering item number. Please contact our Sales Department for pricing

Standard Sizes Item Number
ZOF-50, FELT, 12″ X 12″ X ~0.05″ E04A01
ZOF-100, FELT, 12″ X 12″ X ~0.1″ E04B01
ZOK-15, TRICOT KNIT CLOTH, 12″ X 12″ X ~0.015″ E04C01
ZOW-15, SQUARE WEAVE CLOTH, 12″ X 12″ X ~0.015″ E04D01
ZOW-30, SATIN WEAVE CLOTH, 12″ X 12″ X ~0.03″ E04E01
ZOBF, BULK FIBER, 1 pound E04F01

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