Analysis of high temperature compressive strength of sunrise refractory

The high temperature compressive strength of sunrise refractory material refers to the pressure that can be withstood by the refractory material in a high temperature hot state above 1000~2000 °C, expressed in N/mm2. The compressive strength of refractory materials generally varies significantly with increasing temperature. When the temperature starts from normal temperature, it starts to decrease linearly with increasing temperature. Since then, some materials continue to decline with increasing temperature; some rise when the temperature rises to a certain range, and rise at a certain temperature, and then fall sharply.

 

This change in the high temperature compressive strength of the refractory product is controlled by changes in some of the components of the material, particularly the matrix or combination thereof, at elevated temperatures. Generally speaking, a sintered refractory material composed entirely of crystals is susceptible to plastic deformation due to grain and grain boundaries at high temperatures, especially when the loading speed is small, and plastic deformation is more likely to occur, so that the strength increases with temperature. reduce. When a part of the crystal phase or each crystal phase is melted at a high temperature or a melt is formed, the strength thereof tends to drastically decrease.

When the refractory contains a certain amount of glass phase in addition to crystals, such as silica bricks, clay bricks and high alumina bricks, the matrix is mainly composed of a glass phase, and the strength of such a multiphase material increases with temperature. It also decreases as the structure changes with temperature. However, when the temperature is further increased, since the viscosity of the glass phase changes from brittleness to toughness, the bonding between the particles of the material is made stronger, so that the strength is remarkably improved. Then, as the temperature continues to rise, the melt viscosity in the product drops sharply and the strength decreases as the melt viscosity drops sharply. When the refractory contains a certain amount of binder that varies with temperature, the strength of the article must fluctuate with increasing temperature.

 

Sunrise Refractory Co., Ltd. explains the compressive strength of refractory materials for you. If you have any questions, you can consult at any time. Welcome new and old customers from all walks of life to purchase. sunrise Refractory Co., Ltd. is your right choice.