Pyrophyllite is a layered aluminum-containing silicate mineral, its physical and chemical properties:
1) Mohs hardness of pyrophyllite is 1-2, with good machining performance, easy to break, easy to grind. The hardness increases with increasing SiO2 content.
2) Pyrophyllite powder are generally white, and the whiteness is generally 80, up to 93. The whiteness of pyrophyllite after calcination can reach 96.
3) High temperature stability, pyrophyllite refractoriness ≥1710 ℃. As the content of aluminum oxide increases, the refractoriness increases; as the ignition loss increases, the refractoriness increases; as the Fe content increases, the refractoriness decreases.
4) Good chemical stability of pyrophyllite, does not react with strong acids and bases.
In addition to the above characteristics, pyrophyllite also has excellent characteristics such as good lubricity, low thermal expansion, and low electrical and thermal conductivity.
