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The feature of Magnesia brick

 
Magnesia brick thermal expansion is larger, and the linear expansion coefficient increases with the increase of temperature. The thermal shock stability of magnesia brick, water is only the number of times 2~3. The reason is the large thermal expansion coefficient and thermal conductivity of poor temperature in blast crisis when large thermal stress is easy to produce; matrix CMS is anisotropic, the temperature in blast crisis, because an expansion difference between the accelerated thermal stress, the solubility of periclase magnesium ferrite and changes with temperature. The integration of magnesium ferrite and precipitation also leads to the stress of a higher modulus of elasticity; magnesia brick, the stress buffering capacity is weak. So, easy expansion and easy to crack, the thermal expansion and thermal shock stability.