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Materials

 

Accuflect®

Aluminum Nitride

Aluminum Oxide

Boron Nitride

Fused Silica

Macor®

Mullite

Sialon

Silicon Carbide

Silicon Nitride

Zirconium Oxide

 

 

Sialon Material Properties

Sialon, a fine grain nonporous technical grade engineering material, is a silicon nitride ceramic with a small percentage of aluminum oxide added.

Sialon is outstanding in nonferrous metal contact. It is highly thermal shock resistant, strong, and is not wet or corroded by aluminum, brass, bronze, and other common industrial metals.

.Key Sialon Properties
check Excellent thermal shock resistance
check Not wetted or corroded by nonferrous metals
check High strength
check Good fracture toughness
check Good high temperature strength
check Low thermal expansion
check Good oxidation resistance

Typical Sialon Uses
check Thermocouple protection tubes for nonferrous metal melting
check Immersion heater and burner tubes
check Degassing and injector tubes in nonferrous metals
check Metal feed tubes in aluminum die casting
check Welding and brazing fixtures and pins

Sialon General Information

The combination of silicon nitride and aluminum oxide produces a material with the excellent strength, hardness, fracture toughness and low thermal expansion of silicon nitride, enhanced by corrosion resistance, good high temperature strength and oxidation resistance imparted by the aluminum oxide.

Download Sialon datasheet

Sialon Engineering Properties*

Sialon Properties
Mechanical
SI/Metric (Imperial)

SI/Metric

(Imperial)

Density

gm/cc (lb/ft3)

3.24

(202.3)

Porosity

% (%)

<1%

(<1%)

Color

—

gray

—

Flexural Strength

MPa (lb/in2x103)

760

(110)

Elastic Modulus

GPa (lb/in2x106)

288

(42)

Shear Modulus

GPa (lb/in2x106)

120

(17.4)

Bulk Modulus

GPa (lb/in2x106)

220

(32)

Poisson’s Ratio

—

0.25

(0.25)

Compressive Strength

MPa (lb/in2x103)

—

—

Hardness

Kg/mm2

1430–1850

—

Fracture Toughness KIC

MPa•m1/2

6.0–7.5

—

Maximum Use Temperature
(no load)

°C (°F)

1200

(2200)

Thermal

Thermal Conductivity

W/m•°K (BTU•in/ft2•hr•°F)

15–20

(104–138)

Coefficient of Thermal Expansion

10–6/°C (10–6/°F)

3

(1.7)

Specific Heat

J/Kg•°K (Btu/lb•°F)

—

—

Electrical

Dielectric Strength

ac-kv/mm (volts/mil)

— 

—

Dielectric Constant

—

— 

—

Dissipation Factor

—

— 

—

Loss Tangent

—

— 

—

Volume Resistivity

ohm•cm

— 

—

*All properties are room temperature values except as noted.
The data presented is typical of commercially available material and is offered for comparative purposes only. The information is not to be interpreted as absolute material properties nor does it constitute a representation or warranty for which we assume legal liability. User shall determine suitability of the material for the intended use and assumes all risk and liability whatsoever in connection therewith.

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