Abstract:

The effect of adding different quantities of three kinds of micropowder additives A, B and C on the microstructure and properties of RM45 is studied with help of the method of SEM, XRD and so on. The result shows that the additions of all three kinds of micropowder additives can improve the microstructure of RM45 and reduce the formation of cristobalite phase, but additive C has the best result. After additive C is added into the raw materials of RM45, the redundant part of SiO2 is consumed to form the low melting point solid solution without the cristobalite phase formation in RM45. Its property can be compared favorably with Molochite produced in Great Britain.