Images are for guidance only and might not represent the final product.
Formula: Al₂O₃ 99.9
Form: Rod
Material: Sapphire
CAS Number: 1344-28-1
Commodity: Ceramics
Sapphire Rod delivers exceptional mechanical strength, thermal conductivity, and structural anisotropy, making it an advanced material solution across photonics, vacuum technology, and crystal engineering. It is integral in fields such as optical metrology, semiconductor tooling, and high-precision instrumentation. Key uses include laser gain media housing, crystal alignment systems, and dielectric resonator structures. Rods produced through pulling down or Kyropoulos methods show low defect densities and uniform lattice orientation—critical for sustaining thermal and mechanical loads in harsh conditions. Instruments such as crystal orientation tools and wavefront measurement systems rely on sapphire rods for precision alignment and long-term structural stability. Their dimensional consistency and purity drive innovation in optical ceramics and quantum sensing prototypes. Sapphire Rod remains a benchmark material where rigidity, temperature endurance, and surface polish define performance limits in experimental and industrial platforms.
each

We are collecting your products, please wait!...

Shipping restrictions and charges
may apply for some hazardous materials.

Tolerances

Rod
Diameter +20% / -10%

Material Properties for Ceramics

Chemical Resistance
Element Value
Acids - concentrated Good
Acids - dilute Good
Alkalis Good
Halogens Good
Metals Good
Electrical Properties
Element Value
Dielectric constant 7.5-11.5
Dielectric strength( kV mm⁻¹ ) 15-50
Volume resistivity( Ohmcm ) >10¹⁴@25
Physical Properties
Element Value
Refractive index 1.71-1.79
Useful optical transmission range 200-5500nm
Apparent porosity( % ) 0
Water absorption - saturation( % ) 0
Density( gcm⁻³ ) 3.985
Thermal Properties
Element Value
Melting point( C ) 2050
Upper continuous use temperature( C ) 1800-1950
Specific heat( J K⁻¹ kg⁻¹ ) 750@25°C
Thermal conductivity( W m⁻¹ K⁻¹ ) 35-40@20°C
Coefficient of thermal expansion( x10⁻⁶ K⁻¹ ) 5.8@20-1000°C
Mechanical Properties
Element Value
Tensile modulus( GPa ) 350-390
Hardness - Knoop( kgf mm⁻² ) 2000
Hardness - Vickers( kgf mm⁻² ) 1600-1800
Tensile strength( MPa ) 250-400
Pultrusions
Element Value
Compressive strength( MPa ) 2100

Can't find what you're looking for? For customized options

Other Customers Purchased