Magnesium oxide ceramic is a material mainly composed of magnesium oxide, which is used in thick film integrated circuits. Magnesium oxide ceramics have good conductivity, mechanical strength and high temperature resistance.

Ceramics based on magnesium oxide. Is a cubic crystal system, NaCl type structure. The melting point of pure magnesium oxide is 2800 ℃ ± 13 ℃. Its Mohs hardness is 6, its tensile strength, compressive strength and bending strength are much lower than sintered Al2O3, and its high temperature strength is also lower. MgO is a good insulator with a resistivity of> 1014Ω · cm at room temperature. As the temperature increases, the resistivity drops sharply. Magnesium oxide ceramics are typical alkaline refractory materials, which can work stably up to 2400 ℃ under the protection of oxidizing atmosphere or nitrogen; MgO will decompose in a reducing atmosphere, volatilize in the form of metal magnesium, and begin to volatilize in vacuum at 1600 ℃ Metals such as Fe, Zn, Pb, Cu, M do not reduce it. MgO ceramic can be used as a crucible for smelting metals, and is also suitable for smelting high-purity uranium and thorium in the atomic energy industry; it can also be used as a thermocouple protection sleeve. Use it to make electromagnetic waves pass through, used as radome and infrared radiation transmission window materials.

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