One Of High Level Metals Vanadium Pentoxide Flake

Cobalt-vanadium ultra-high density vertical magnetic recording medium and preparation method thereof, involving a magnetic recording medium. It provides a cobalt-vanadium ultra-high density vertical magnetic recording medium with high magnetocrystalline anisotropy, good vertical magnetic recording characteristics and excellent chemical stability, which can meet the requirements of low noise and high thermal stability required by vertical magnetic recording medium, and can be used for high-density vertical magnetic recording and its preparation method. It is a polycrystalline structure of HCP structure, with a vanadium atomic percentage of 13%~24% and a thickness of 200~600nm. The cleaned glass substrate is loaded into the sputtering chamber, the cobalt target is loaded, and the vanadium pentoxide flake is placed on the cobalt target;The vacuum of pumping to the background vacuum of the sputtering chamber is better than 5×10-4Pa; Heating sputtering chamber at 200~300°C; Ar gas is introduced, the air pressure is kept at 0.6~0.7Pa, the pre-sputtering is at least 10min, the target surface is cleaned, and finally the sputtering is deposited for 20~60min.

1.Powdered vanadium pentoxide,vanadium pentoxide flake is obtained by calcination and decomposition of ammonium metavanadate or ammonium polyvanadate at 450~600 °C, and a large amount of ammonia and water vapor is overflowed during the decomposition process, which carries a small amount of powder, which is collected after separation, this part of the material is not fully calcined and oxidized, and a small amount of material is reduced to a low-price state by ammonia at high temperature, and the product quality does not meet the requirements and becomes a defective product. Calcining equipment commonly used rotary kiln, external heating rotary kiln, because the furnace wall temperature is too high to melt a small amount of material and become a higher hardness of vanadium, the remaining part of the calcined material after screening vanadium flake becomes secondary

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