Description
Product Overview Magnesium oxide ceramics belong to the cubic crystal system. Magnesium oxide ceramics have a
large thermal expansion coefficient and a high vapor pressure. The melting point is 2800 ° C, but it is
volatile above 2300 ° C; the specific volume resistance (35V/mm) at high temperature is large. Has
good insulating properties. Product Features
1. High-purity magnesium oxide ceramics have strong corrosion resistance to metals and alkaline
solutions, and are used as crucibles for melting high-purity iron and alloys as well as nickel, thorium,
uranium, tin, lead, zinc, copper, cobalt and their alloys. 2. As a container for fused alumina and
aluminum salts.
3. The thermocouple protection tube made of magnesium oxide is used to measure the high temperature
above 2000ºC.
MgO Ceramic Physical Properties |
Properties | Unit | MgO |
Contents | % | 95, 99.5 |
Density | g/cm3 | 3.56 |
Hardness | Mohs' | 6 |
Liner Thermal Expansion | /ºC | 8.6 x 10-6 |
(40° to 250°) |
Work Temperature | ºC | 2400 |
Flexual Strength | MPa | 84 |
Compressure Strength | MPa | 14 |
Fracture Strength (5 distance) | MPa | 125 |
Thermal Conductivity | W/m.k | 15.9-42 |
Volume Resistivity (100 ºC) | - | >1012 |
Dielectric Constant 1.0 MHz | - | 5.8 |
Max Size | - | 250mm Long |