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Characteristics and Application of High Purity Zirconia Beads
Release time：
2022-11-23 14:23
As the fineness requirements of materials become higher and higher, the use of sand mills is becoming more and more common, and there are more grinding media on the market, and zirconia beads are the leader among them. In the production of coatings, zirconia beads need to be used for coating sand grinding. The particle size of zirconia beads will become smaller after long-term grinding. The smaller particle size of zirconia beads will reduce the grinding efficiency. New zirconia beads need to be replaced regularly to meet the process requirements. High-purity zirconia beads use yttrium oxide as a stabilizer, titration or dry powder and other static pressing molding, and the process of high temperature burning and cultivation of the phase is formulated. There are two types of shapes: spherical and cylindrical. The diameter of the microcrystals is small by 0.5um, so that the medium has excellent wear resistance. It is especially suitable for vertical high-speed mixers, high-line speed rod pin sand mills, all-ceramic grinders for new material grinding and other equipment to refuse to pollute slurries and powders. Wet and dry ultrafine dispersant grinding. So what are its characteristics?
Features
The wear rate is extremely low, the service life is long, and the cost performance is high. The specific ratio is large, the impact force between the ball and the ball during grinding is large, the grinding kinetic energy is large, and the grinding efficiency is high. Resistant to all kinds of chemical liquid corrosion. The surface is very smooth, the appearance is the same, it is easy to clean, and the loss of equipment is extremely small. High mechanical strength, impact resistance, good crystallization density and toughness, no broken ball phenomenon.
Zirconia beads can be used for ultra-fine grinding and dispersion in non-metallic mining, papermaking, heavy calcium, paints, inks, electronic materials, lithium-iron batteries, magnetic materials, textile dyes, pharmaceuticals and other industries.
Preparation of ground silicon carbide by zirconia beads of different particle sizes: select mixed zirconia beads of different particle sizes, zirconia beads with particle size Φ4~ 6mm in mixed zirconia beads account for 55~ 65%, and zirconia beads with particle size Φ3~ 2mm account for 20~ 30%, zirconia beads with particle size Φ2~ 1mm account for 10~ 20%, and the content of zirconia in the above-mentioned zirconia beads is required to be greater than 95%; according to the weight ratio, mix zirconia beads: silicon carbide = 1: {1~ 2} together into a ball mill for grinding for 1~ 1.5h, in which silicon carbide is black silicon carbide with a silicon carbide content ≥ 95%, and then sieve out the mixed zirconia beads to prepare Grinding silicon carbide.
In addition, zirconia beads have the following characteristics: extremely low (ppm level) wear (wear resistance is 30 to 50 times that of glass beads); extremely high hardness; extremely high density (can effectively improve the grinding efficiency); high temperature resistance and corrosion resistance; It can be reused many times and has low cost of use; the zirconia bead wall breaking method is a fast, efficient, economical and high-throughput wall breaking method. At present, reports on the use of zirconia beads to break the cell wall of lactic acid bacteria are mainly concentrated in foreign countries, but no research on the optimization of the zirconia bead wall breaking method in terms of bacterial weight, grinding buffer and grinding time has been found at home and abroad. The zirconia bead wall breaking method has good applicability to the wall breaking of lactic acid bacteria, and this method may become a general and effective wall breaking method.
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