Sand mill grinding medium is one of the important factors affecting the efficiency of sand mill. So when in use must pay attention to. Sand mill is called a sand mill for grinding media is the earliest use of the natural sand, in foreign countries, until now still make the natural sand. This natural sand is through screening, early references with 20 ~ 40 better. But the current grinding media can be used to minimize 0.1mm.

Ceramic capacitor high frequency and low frequency of two ceramic ceramic. The capacitor has a positive temperature coefficient of capacitance small, used for high stability oscillation loop...

ceramic history know without the person, who is the first clay into a container, and then placed in the sun, the vessel will be hard enough, you can store water and food. But between Sixth Century BC and eighth Century Chinese invention of delicate white, also slightly translucent container...