I think there two a new variants of AS5!!!!
One is called: "Arctic silver ceramique".
The other product is called "Arctic alumina ceramic".
Which one is better?
The stats of Arctic Silver Ceramique is:
Thermal Resistance: <0.007°C-in2/Watt (0.001 inch layer)
Thermal Conductance: >200,000W/m2.°C (0.001 inch layer)
Average Particle Size: <0.38 microns <0.000015 inch (67 particles lined up in a row equal 1/1000th of an inch.)
Alumina Ceramics are used in a very broad range of wear resisting surfaces and for the repair of wear resisting surfaces of coal mills. Indeed, these alumina liners do provide the best solution for giving the desired performance.
A study was conducted for erosion pattern of coal mill internals due to coal flow in vertical spindle pulverizers in PC Boilers. The coal and air mixture makes a number of turns before it reaches the Multiple Port Outlet. The changes in direction of flow cause the majority of coal particles to accumulate in the "Red marked" portion of the pulverizer.