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Item # AZ-25, 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

Specifications

Material

Zirconia


Mechanical Properties

Density

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3.82 g/cc

Average Crystal Size

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5 Microns

Water Absorption

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1 %

Gas Permeability

0

Color

White

Flexural Strength (MOR) at 20ºC

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172 MPa
25 x 103
psi

Compressive Strength at 20ºC

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2310 MPa
335
psi

Knoop Hardness at 1000gm

10.4 GPa
1058
kg/mm²

Rockwell Hardness at 45 N

75

Fracture Toughness K(Ic)

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5 to 6 MPa m1/2


Thermal Properties

Thermal Conductivity at 20ºC

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13.0 W/m-ºK

Coefficient of Thermal Expansion at 25-1000ºC

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8.5 x 10-6 Per ºC

Thermal Shock Resistance ΔTc

500 ºC

Maximum Use Temperature

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1400 ºC


Electrical Properties

Dielectric Constant at 1 MHz & 25ºC

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9.8

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

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0.0010

Volume Resistivity at 25ºC

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>1013 ohm-cm

Volume Resistivity at 500ºC

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5 x 107 ohm-cm

Volume Resistivity at 1000ºC

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<103 ohm-cm


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