The magnesium oxide a kind of white and shapeless powder, and colorless, tasteless, non-toxic. The relative density is 3.85(25℃), melting point is 2852℃ and the boiling point is 3600℃. What’s more, it is excellent refractory matter, fire pipe, crucible and others. The single crystal magnesium oxide means that the content of MgO is more than 99.95%. It has strong high and low temperature resistant(The high temperature achieves 2500℃, the low temperature achieves -270℃), resistance to corrosion, insulativity and excellent thermal conductivity, optical property.
The main specifications of magnesium oxide is depicted as follows:
Attice constant: a=4.212
Molecular weight: 40.311
Density (g/cm): 3.65
Coefficient of thermal expansion(×10-7/℃)(25℃): 138
Moh’s hardness: 5.5
Light transmittance: when is optical wavelength from 200 to 2000, the transmittance is 92%.
when is optical wavelength from 2.5 to 7 micron, the transmittance is more than 92%.