Grinding ball has a large surface area and good wear resistance

- Aug 02, 2018 -

When the grinding ball is used, its application becomes more and more extensive. Its zirconia grinding ball has the characteristics of high density, high toughness and high hardness. It has high grinding efficiency, less wear and less impurities in the production. More superior performance. The domestically produced zirconia grinding balls, the zirconia powders (partially stable) are mostly prepared by the coprecipitation method, which has the advantages of high purity and high activity, excellent zirconia grinding balls and stable quality. .

 

The particles having a rough surface of the grinding ball have a relatively large specific surface area or surface energy to a certain extent, so that the sintering driving force is large, the sintering is easy, the sintering density is large, and the pores are small and small. The granular particles with smooth surface of the grinding ball have smaller specific surface area or surface energy, so the sintering driving force is smaller and the sintering is less, the sintering density of the ceramic is relatively low, and the cavity is large and large. Compared with the granular particles, the plate-like particles have a large specific surface area, a large driving force for sintering, and are easily sintered.

 

The grain of the grinding ball is relatively small, and the mechanism of its wear is mainly due to its plastic deformation and partial transgranular end cracking, which causes slight wear. When the grain is coarse, the wear mechanism is mainly crystal The boundary breaks, causing severe wear, so the smaller the crystal grains, the better the wear resistance of the ceramic. Therefore, it is desirable to use a raw material of alumina having a small particle size in order to reduce the grain size of the ceramic. In addition, the small particles have a relatively large specific surface area or surface energy compared with the large particles, so that the sintering driving force is large, the sintering temperature is low, and the sintered density is high.

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