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Polished Alumina Substrate

Polished Alumina Substrate

Activated polished alumina substrate is a type of ceramic material used in a variety of electronic and optical applications. The substrate is made from high-purity alumina that has been polished to a smooth and uniform surface finish, allowing for precise and reliable performance in various applications.

The activated polished alumina substrate is used as a base material for electronic circuits, sensors, and optical devices. Its high mechanical strength, thermal stability, and excellent electrical insulation properties make it an ideal material for these applications. Additionally, the activated surface of the substrate provides a high surface area for the deposition of various functional materials, such as metals, semiconductors, and dielectrics, allowing for the fabrication of complex electronic and optical devices.

The activated polished alumina substrate is widely used in the semiconductor industry for the production of integrated circuits and microelectromechanical systems (MEMS). It is also used in various optical applications, such as fiber-optic communication systems, displays, and laser components.

One of the key advantages of activated polished alumina substrate is its ability to withstand high temperatures and harsh environments. This makes it suitable for use in extreme conditions, such as in space and military applications.

Overall, activated polished alumina substrate is a highly versatile and reliable material with a wide range of applications in the electronics and optical industries. Its excellent mechanical and electrical properties, along with its high thermal stability and resistance to harsh environments, make it an ideal choice for demanding applications where precision and reliability are critical.


Catalog No. CERAMICS
Size Customized
Material Al2O3
Purity 95% 99% 99.7%
Density 3.8~3.9 g/cm3


At CG Material, we offer high quality Polished Alumina Substrate with exceptional purity and precision in terms of size. Our products range in diameter from 1mm to 100mm and have a purity level of up to 99.8%. We also provide custom manufacturing options for special shapes to meet specific needs.

Polished Alumina Substrate Specifications

Product No. A476T A479 A479H
Content % 96 99.5 99.5
Color White Ivory Ivory
Density (g/cm3) 3.7 3.9 3.9

Max. 120mm x 120mm SQ

Thickness: 0.25, 0.38, .0635mm

Thickness Tolerance

±0.02mm (<3 square inches)

±0.05mm (≥3 square inches)

Substrate Thickness (mm) 0.05-2.7 0.05-0.7 0.05-0.7
Flatness (mm) 0.05-0.6 0.05-0.4 0.05-0.4
Surface Roughness
(Mirror Polish) (mm)
<Ra0.05 <Ra0.02 <Ra0.01
Vickers Hardness HV9.807N (Gpa) 13.7 15.7 15.7
Flexural Strength (Mpa) 350 370 370
Young's Modulus of Elasticity 320 370 370
Thermal Conductivity (20℃) 24 32 32
Specific Heat Capacity (J/g·K) 0.78
Dielectric Strength (kV/mm) 15


Polished Alumina Substrate Applications

To hold samples for spectroscopic measurement.


We handle our products with care to ensure they remain in their original condition during storage and transportation and to preserve their quality.



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