There are two major trends in the development of the powder industry today, namely: high purity and high fineness. The purity of the ultrapure powder needs to reach 99.99% or higher, and the fineness of the ultrafine powder needs to reach the nanometer level. There are two main types of commonly used powder preparation processes: physical methods and chemical methods. The fineness of chemically synthesized powders is good, but the purity may be poor. As a physical method, ball milling is widely used in the powder industry. Among them, planetary ball mills, stirring mills, vibration mills, etc. can achieve micron-level fineness, while sand mills can achieve sub-micron or even nanometer-level fineness. . To achieve the high purity and fineness of the powder, not only advanced grinding machinery, but also high-quality grinding media are required to match it.
For sand mills with wide material adaptability, high efficiency, and more advanced grinding equipment, the smaller the size of the grinding medium, the greater the hardness and density, and the higher the proportion of the grinding ball in the unit volume. The more contact points between the media, the more stable the nature of the media, the higher the degree of crushing of the product materials, the lower the wear, and the higher the grinding efficiency.
The zirconia ceramic grinding ball has a larger specific gravity and a smaller particle size, and will not pollute the material to be ground, which meets the production requirements of ultrafine powder. Therefore, zirconia ceramic balls have become the most commonly used grinding media in sand mills. At the same time, ZrO2 ceramic balls, as a kind of product with a large amount and a wide range of applications, have been widely used in ceramics, building materials, chemicals, coatings, electronics, machinery, food, medicine, cosmetics and many other industries.
Because ZrO2 material itself has excellent characteristics of high hardness, high strength, high toughness, high wear resistance, high corrosion resistance, large volume density, high grinding efficiency, etc., in addition to the extensive use of ZrO2 ceramic powder grinding, ZrO2 ceramic balls In other electronic ceramic powder, magnetic material powder, high-tech structure and functional ceramic powder, daily ceramic pigment and glaze, chemical and various coatings, mechanical polishing powder, medicine and food powder, as well as in special Inorganic material powders (such as ZrSiO4, titanium dioxide, etc.) also play an extremely important role in the ultrafine grinding. It is unmatched by other grinding media for reducing the introduction of impurities in the material to be ground and improving the grinding and dispersion effect.
