The high temperature compressive strength of refractory materials is the maximum pressure that can be under at high temperature of 1000~2000, which is expressed by N/mm2. The
compressive strength of refractory materials is obviously changed with the increase of temperature. When the temperature rises from the constant temperature, the temperature decreases linearly with the increase of temperature. Since then, some of the material is still with the temperature rise and continue to fall; some when the temperature rises to a certain range, then with the temperature rise and rise, and at a specific temperature to give the highest value, followed by a sharp decline.
compressive strength of refractory materials is obviously changed with the increase of temperature. When the temperature rises from the constant temperature, the temperature decreases linearly with the increase of temperature. Since then, some of the material is still with the temperature rise and continue to fall; some when the temperature rises to a certain range, then with the temperature rise and rise, and at a specific temperature to give the highest value, followed by a sharp decline.
The change in the high temperature and pressure strength of the refractory products is controlled by the change of the matrix or the combination of the matrix or the combination of the material in the material. In general, composed entirely of crystal sintered refractory materials, due to high temperature which grain and grain boundary prone to plastic deformation, especially when the loading rate is easier to produce plastic deformation, so the strength with increasing temperature decreases. When some of the crystalline phases or the
phases of the crystal phases melt at high temperature or form a molten body, the intensity of which is often intense. When the refractory materials except contain crystals, also contains a certain amount of glass phase, such as brick, clay brick, high alumina brick, the matrix is mainly composed of a glass phase composition, with the increase of temperature, such multiphase material strength due to structure decreased with the temperature changes. However, when the temperature is further improved, the viscosity of the glass phase is changed from brittle to strong toughness, so that the material particles can be combined more firmly, so that the strength can be improved obviously. Then, when the temperature continues to raise, the viscosity of the melt decreases sharply and the strength decreases sharply with the melt viscosity. When the refractories contains a certain amount of change with temperature, the strength of the product will be corresponding to the temperature increase.
phases of the crystal phases melt at high temperature or form a molten body, the intensity of which is often intense. When the refractory materials except contain crystals, also contains a certain amount of glass phase, such as brick, clay brick, high alumina brick, the matrix is mainly composed of a glass phase composition, with the increase of temperature, such multiphase material strength due to structure decreased with the temperature changes. However, when the temperature is further improved, the viscosity of the glass phase is changed from brittle to strong toughness, so that the material particles can be combined more firmly, so that the strength can be improved obviously. Then, when the temperature continues to raise, the viscosity of the melt decreases sharply and the strength decreases sharply with the melt viscosity. When the refractories contains a certain amount of change with temperature, the strength of the product will be corresponding to the temperature increase.
没有评论:
发表评论