MgO（Magnesium Oxide） 

Magnesium Oxide substrate is widely used for various films: magnet film, semiconductive film, optical film as well as high Tc superconductive film. MgO crystal is possible to get large size (larger than 2 inch) and has low dielectric loss in microwave band, so it is an important material for high Tc superconductive microwave devices in the mobile communication as well as other industrial areas.

 


Crystal structure
 		 cubic，m3m， NaCl type

Cell parameter
 		 a=4.213 Å

（°K）
Melting point

 3250

（g/cm3）

Density		 3.58

（J/g·k）

Specific Heat		 0.879(298°K)

（W/m·k）

Thermal conductivity		 59(300°K)

（x10-6k-1）

Thermal expansion		 11(300°K)

（εr）

Dielectric constant

9.8(295°K)

9.7(80°K)

(17-28GHz)

（tgδ）

Dielectric loss

3.5x10-6(80°K)

microwave

（Mohs）

Hardness		 5.5

rowth Method
 		 Arc Melt

Specifications

Standard Size:  2”x2”，Ф2″，1”x1”, 20x20，10x10，10x5，10x3mm…

or customer design

Thickness:   0.5mm，1.0mm.

Thickness tolerance:±0.02mm

or ±0.005mm for special order

Polish:  one or two sides

Orientation：＜100＞  ＜110＞  ＜111＞

Orientation accuracy:±0.5°

Edge Orientation accuracy:

2°（or 1°for special order）

Cut with special tilt angle ：

available(tilt angle:1°－45°）

Microroughness Ra：≤5Å（5μm×5μm）