Using special autoclave, it researches the hydration process of fused magnesium oxide monocrystal in saturated steam and the high purity sand from 135℃ to 200℃. Therefore, the obtained conclusions are:
(1)In the early stage and short time, the hydration of single crystal is slowly. And then, it achieves the promotion phase and lag phase. During this period, the magnesium hydroxide barrier will continuous grow up, and never fall apart.
(2)In the promotion phase, the hydration of single crystal was dominated by the combined action of reaction control and diffusion control. This process can be thought that it is caused by the concomitant compact tissue in the early stage and crumbly texture latterly.
(3)In the early stage, the hydration of polycrystal speeds up the development. It is the same as the result of sand, it is also named pulverization. The pesting phenomenon will last to become single crystal absolutely.
The above is the research from the expert of Meishen Technology, which is a professional magnesium oxide manufacturer and supplier.