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Item # ZTA, Dense Ceramics - Alumina, Mullite, & Zirconia (3200ºF - 3600ºF Range)



Fully Dense Porcelain, Mullite, Alumina, Zirconia, Silicon Carbide, and Tungsten Carbide are gas-tight high-fired ceramics capable of withstanding operating temperatures of 2550ºF (1400ºC) to 3182ºF (1750ºC). These compositions are available in the forms of extruded and cast tubing, rods, plates, fish spine beads, lab ware, and custom molded shapes.




Specifications  · Mechanical Properties  · Thermal Properties  · Electrical Properties  · Wear Properties

Specifications

Material

Zirconia


Mechanical Properties

Density

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4.05 g/cc

Average Crystal Size

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2 Microns

Water Absorption

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0 %

Gas Permeability

0

Color

White

Flexural Strength (MOR) at 20ºC

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450 MPa
65 x 103
psi

Elastic Modulus at 20ºC

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350 GPa
52 x 103
psi

Poisson's Ratio at 20ºC

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0.23

Compressive Strength at 20ºC

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2900 MPa
421
psi

Knoop Hardness at 1000gm

14.4 GPa
1475
kg/mm²

Rockwell Hardness at 45 N

85

Tensile Strength at 25ºC

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290 MPa
42 x 103
psi

Fracture Toughness K(Ic)

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5 to 6 MPa m1/2


Thermal Properties

Thermal Conductivity at 20ºC

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27.0 W/m-ºK

Coefficient of Thermal Expansion at 25-1000ºC

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8.3 x 10-6 Per ºC

Specific Heat at 100ºC

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885 J/kgºK

Thermal Shock Resistance ΔTc

300 ºC

Maximum Use Temperature

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1500 ºC


Electrical Properties

Dielectric Strength

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9.0 ac-kV/mm
228
ac V/mil

Dielectric Constant at 1 MHz & 25ºC

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10.6

Dielectric Loss (tan delta) at 1 MHz & 25ºC

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0.0005

Volume Resistivity at 25ºC

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>1014 ohm-cm

Volume Resistivity at 500ºC

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2 x 109 ohm-cm

Volume Resistivity at 1000ºC

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3 x 106 ohm-cm


Wear Properties

Impingement

0.41

Rubbing

0.49


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