Preparation method of ultrahigh-purity aluminum target
A pure aluminum target, ultra-high technology, applied in metal material coating process, ion implantation plating, coating, etc., to achieve the effect of easy operation, large-scale industrial production, fine and uniform grain
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[0013] A method for preparing an ultra-high-purity aluminum target, comprising the following steps: (1) surface milling an ultra-high-purity aluminum ingot with a purity greater than 99.999wt%, to remove an oxide layer on the surface; (2) heating the ingot to 230~400°C; (3) Hot rolling the heated ingot for 10~20 passes, the single pass reduction is controlled at 20~60mm, and the final rolling temperature of the last pass is controlled below 350°C; ( 4) Perform annealing treatment on the hot-rolled aluminum plate at a temperature of 200-300°C and a holding time of 1-2 hours; (5) Mill the plate after leveling to obtain an ultra-high-purity aluminum alloy with an average grain size of 80-150um. Aluminum target.
[0014] In this example, 99.999wt% of the ultra-high-purity aluminum ingot in step (1) is produced from 99.9wt% of the high-purity aluminum ingot by three-layer liquid electrolysis and segregation.
[0015] In this embodiment, the milling amount in step (1) is not less t...
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