Magnesium oxide-MgO

     Magnesium oxide-MgO is a refractory material with excellent thermal and chemical stability and is widely used in refractory materials, ceramics, glass, cement and metal smelting.

Physical properties
Specific gravity (S.G): 3.58g/cm³
Porosity: 10%
Vickers hardness (HV1 Hardness): 650 HV
Flexural Strength: 105 MPa
Compressive Strength: 275 MPa
Young's Modulus: 2.1 x 10^11 Pa(N/m²)
Fracture Toughness: 1.8 MPa·m^1/2

Thermal properties
Coefficient of Thermal Expansion:
40 ~ 400°C: 10 x 10^-6/°C
40 ~ 800°C: 10.5 x 10^-6/°C
Thermal Conductivity: 42 W/m·K
Specific Heat: 0.92 J/g·°K
Thermal Shock/Resistance Dielectric Strength: 17 kV/mm

Electrical properties
Volume Resistivity:
20°C: > 10^14 Ω·cm
500°C: > 10^8 Ω·cm
Dielectric constant (Permittivity): 9.8 C²/(N·m²) (1MHz)
Dielectric Loss Angle: 1 x 10^-4 (1MHz)

Magnesium oxide has excellent insulation, heat resistance, corrosion resistance and high hardness, and is an important inorganic functional material.