Hafnia Textiles and Fibers, type HF

HAFNIA FIBERS and TEXTILES

TYPE HF

Features

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

Our hafnia (HfO2) fibers and textiles are made by the same unique Zircar process used for
manufacturing yttria-stabilized zirconia cloths and felts. Our high purity hafnia fiber and
textiles are offered in six different standard product forms; bulk fiber Type HfBF, two felts
Types HfF-50 and HfF-100 and three types of knit cloth Types HfK-15, HfW-15 and HfW-
30.

APPLICATION INFORMATION

Hafnia is used as ultra high temperature insulation for nuclear meltdown experiments.

PROPERTIES & CHARACTERISTICS

HfF-100 HfK-15
Nominal Composition, Wt%
HfO2 99+ 99+
ZrO2 0.026 0.026
Fe2O3 0.012 0.012
SiO2 <0.01 <0.01
Melting Point, °C (°F) 2758 (4996) 2758 (4996)
Bulk Porosity, % 95 89
Bulk Density, g/cc (pcf) 0.5 (31) 1.1 (67)
Tensile Strength, g/cm width (lb/inch width) 55 (0.31) 100 (0.56)
Loss on Ignition, 1 hr at 950°C (1742°F), Wt% 0.1 0.0
Outgassing Nil Nil
% Shrinkage, 1 hour at 1650°C (3002°F) 5 6

ORDERING INFORMATION

Type Hf Fibers and Textiles are available in six standard product forms, which are listed in
the table below with their ordering item number. Please contact our Sales Department for
pricing and availability.

Standard Sizes Item Number
HfF-50, FELT, 12″ X 12″ X ~0.05″ E03A01
HfF-100, FELT, 12″ X 12″ X ~0.1″ E03B01
HfK-15, TRICOT KNIT CLOTH, 12″ X 12″ X ~0.015″ E03C01
HfW-15, SQUARE WEAVE CLOTH, 12″ X 12″ X ~0.015″ E03D01
HfW-30, SATIN WEAVE CLOTH, 12″ X 12″ X ~0.03″ E03E01
HfBF, BULK FIBER, 1 pound E03F01

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