A method for preparing high-purity germanium ingot by vacuum melting and casting germanium powder

By employing a vacuum melting casting method with nitrogen and hydrogen protective atmospheres and controlling the heating and cooling rates, the problems of high cost, high safety risks, and low efficiency in high-purity germanium powder casting in the existing technology have been solved, achieving efficient and safe germanium ingot production.

CN119304173BActive Publication Date: 2026-02-13KUNMING YUNZHE HIGH TECH
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Patent Information

Application Number
CN202411408422.2
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2024-10-10
Publication Date
2026-02-13
Estimated Expiration
2044-10-10

AI Technical Summary

Technical Problem

In the existing technology, the casting process of high-purity germanium powder is mainly carried out in a horizontally placed tubular reduction furnace, without involving vacuum melting casting. This results in high production costs, high safety risks, low production efficiency, and difficulty in ensuring the uniformity and stability of germanium materials.

Method used

The vacuum melting casting method is adopted, in which graphite boats are melted at high temperature in a vacuum melting casting furnace. Nitrogen and a small amount of hydrogen are used as a protective atmosphere to control the heating and cooling rates, avoid the participation of large amounts of hydrogen, and improve production efficiency and product uniformity.

Benefits of technology

It reduces production costs and safety risks, improves production efficiency, ensures the uniformity and stability of germanium materials, reduces the problem of uneven product performance, and reduces the amount of high-purity nitrogen used.

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Abstract

The application discloses a method for preparing high-purity germanium ingot by reducing germanium powder vacuum melting and casting ingot, which comprises the following steps: first, cleaning and loading the graphite boat; second, vacuumizing; third, passing in nitrogen containing 1% hydrogen; fourth, heating and melting and casting ingot; fifth, cooling; sixth, continuously passing in high-purity nitrogen, and waiting for the furnace body to restore normal temperature and pressure; seventh, taking out the material from the furnace. The high-purity reduced germanium powder is cast into ingot in a high-temperature ingot casting furnace under a vacuum nitrogen protection atmosphere, so that a large amount of hydrogen is avoided, production cost and safety risk are reduced, production efficiency is improved, and production cost is reduced.
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