Special parts in fused and sintered mullite

There are many types of mullite, such as fused mullite, sintered mullite are included, they are classified according to different processing methods. What aspects need to be concerned about these products?
Compared with sintered mullite, high-purity fused mullite is more prominent in terms of properties, such as high temperature mechanical properties, erosion resistance and so on. In addition, fused mullite also has a special performance in terms of color, such as ordinary fused mullite is dark or black; High purity fused mullite is light gray; At a certain temperature, it is different, ordinary fused mullite becomes light yellow, and high-purity fused mullite becomes white.
For sintered mullite, the mineralizer is important because it is the key to changing the properties of the product. In actual production, whether to add mineralizer and choose what kind of mineralizer should be determined according to the characteristics of raw materials.