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 |
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