company news about The transformation process in the production process of refractory brick

In the production process of refractory brick, the transformation process often occurs: solid solid phase. This change is a process by the crystal structure to another structure, common in silicate refractory brick. Is there such a concept, the crystal in a certain temperature range if a structure is the lowest enthalpy, then the structure of the crystal is the most stable at this temperature, and in another range of temperature often is another crystalline free enthalpy is lowest, and the most stable structure.