Under the situation of rapid development of science and technology, to prepare high-temperature, high-performance, new-type materials, the first thing to do is to solve the refractory materials needed in the preparation process. The characteristics of refractory materials are as follows: 1. Mechanical properties The elastic modulus of special refractory materials is large. Most have higher mechanical strength, but compared with metal materials, due to brittleness, impact resistance is very low. Most special refractory materials have high hardness, so they have better resistance to wear, airflow or dust erosion. Most special refractory materials have relatively small high-temperature creep is molybdenum disilicide. The size of the creep value is related to the crystal size, grain boundary material, porosity, etc. 2. Thermal properties (1) Thermal expansion: Thermal expansion refers to the reversible increase and decrease of the linearity and volume temperature of the material. It ...
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