MgO Substrate

MgO is an excellent single crystal substrate for thin films of Ferro magnetic, Photo-electronic and high Tc superconductor material. Because the dielectric constant and loss microwave band of MgO single crystal is very small, and the large size MgO substrate (diameter of 2 inches and larger) can be obtained, it has currently become an important industrial HTS thin monocrystalline substrate. 

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Features

1 ) Good optical, mechanical and thermal properties

2 ) Best substrate for infrared optical isolator

3 ) Good substrate for microwave isolator

Applications

1 ) Ferro magnetic thin films

2 ) Photo-electronic substrates

3 ) HTS thin monocrystalline substrates

Specifications

Materials

MgO

Orientation

[100] or [100] or [111] < ±0.5°

Surface Finish

Single side polished (SSP) or Double sides polished (DSP)

Polished Side Roughness

< 0.5 nm

Typical Size

10 x 10 x 0.5 mm, φ50.8 x 0.5 mm etc.

Dimension Tolerance

±0.1 mm or better

Thickness Tolerance

±0.05 mm or better

Maximum Size

50 x 50 x 30 mm

Properties

Chemical Formula

MgO

Crystal Structure

Cubic

Lattice Parameters

a = 4.216 Å  

Melting Point

2852 ℃

Density

3.58 g/cm3

Purity

99.95% 

Hardness

5.5~6 Mohs

Thermal Expansion Coefficient (/ ℃)

12.8 × 10^-6 

Optical Transmission

> 90% (200~400nm), > 98% (500~1000nm)

Dielectric Constants

9.80

Thermal Conductivity (cal / cm sec degree)

0.14 300 ° K