Magnesium Oxide MgO

Magnesium Oxide (MgO) SDS
Magnesium Oxide (MgO) Data Sheet

Magnesium Oxide can be used for high temperature windows and substrates. High Temperature Superconductor (HTSC) substrates.

Transmission Range
0.3 to 6 μm
Refractive Index
1.7085 at 2 μm (1)
Reflection Loss
12.8% at 2 μm (2 surfaces)
Absorption Coefficient
0.05 cm-1 @ 5 μm
Reststrahlen Peak
n/a
dn/dT
19 x 10-6 K-1
dn/dμ = 0
n/a
Density
3.58 g/cc
Melting Point
2800°C
Thermal Conductivity
42 W m-1 K-1 @ 273 K
Thermal Expansion
10.8 x 10-6/°C @ 273 K
Hardness
Knoop 692 with 600g indenter
Specific Heat Capacity
877 J Kg-1 K-1
Dielectric Constant
9.65 at 1 MHz
Youngs Modulus (E)
249 GPa
Shear Modulus (G)
155 GPa
Bulk Modulus (K)
155 GPa
Elastic Coefficients
C11 = 294 C12 = 93 C44 = 155
Apparent Elastic Limit
138 MPa (20,000psi)
Poisson Ratio
0.18
Solubility
0.00062g/100g water
Molecular Weight
40.32
Class/Structure
Cubic FCC, NaCl, Fm3m, (100) cleavage

Note that MgO crystal is quite difficult to source.

µm No
0.171 2.319
0.180 2.138
0.191 2.039
0.200 1.986
0.230 1.892
0.276 1.824
0.310 1.795
µm No
0.382 1.7668
0.436 1.7547
0.50 1.754
0.644 1.734
1.00 1.7229
2.00 1.7085
3.00 1.6915
µm No
4.00 1.6679
5.00 1.6373
6.02 1.5957
7.04 1.543
8.07 1.475
9.09 1.389
10.64 1.209

Magnesium Oxide is grown in relatively small sizes, mainly in Japan and China. It was grown, along with a number of other xides, in the UK by Spicers at Greenwich, but ceased cintinuity when the proprietor retired. Consequently, It is quite difficult to source.

REFERENCES:
(1) Handbook of Optical constants of Solids II ISBN 0-12-544422-2

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