Methods for purifying germanium by zone smelting

By using a zone melting method with alternating forward and reverse moving heating coils, the problems of uneven resistivity distribution and uneven thickness of germanium ingots were solved, achieving uniform resistivity and thickness of germanium ingots, and obtaining longer qualified sections and higher purity germanium products.

CN121653420BActive Publication Date: 2026-08-11安徽光智科技有限公司
2 Cites 0 Cited by

Patent Information

Application Number
CN202511886515.0
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2025-12-15
Publication Date
2026-08-11
Estimated Expiration
2045-12-15

AI Technical Summary

Technical Problem

Existing regional smelting methods result in uneven resistivity distribution of germanium ingots, short qualified sections, and large differences in thickness between the beginning and end of the germanium material, which affects the yield.

Method used

By using alternating forward and reverse moving of the heating coil, impurities are segregated in specific sections through initial single forward zone melting and reverse zone melting one and two. Further impurity segregation is carried out in the early high-purity section through reverse zone melting two, resulting in a high-purity A1-B1 section, achieving uniform resistivity and thickness.

Benefits of technology

This method suppresses the phenomenon of gradual decrease in the resistivity of germanium ingots, solves the problems of poor resistivity uniformity and uneven thickness, and obtains longer qualified sections and higher purity germanium products.

✦ Generated by Eureka AI based on patent content.
Patent Text Reader

Abstract

A method for refining germanium by zone melting includes: S1, germanium material processing; S2, furnace loading; S3, moving the heating coil from the head to the tail; S4, zone melting, including: S41, when the germanium material at the tail is completely solidified, moving in the reverse direction, first quickly moving to point B, melting the material from point B, and moving from point B to the head; S42, when the germanium material at the head is completely solidified, moving in the forward direction, first quickly moving to point A, melting the material from point A, and moving from point A to the tail; S43, repeating S41 and S42; 5. Zone Melting II, including: S51, when the germanium material at the tail end is completely solidified, move in the reverse direction, first quickly move to point B1, which is farther from the tail end than point B, melt the material from point B1, and move from point B1 to the head; S52, when the germanium material at the head end is completely solidified, move the heating coil in the forward direction, first quickly move to point A1, which is farther from the head end than point A, melt the material from point A1, and move from point A1 to the tail end; S53, repeat S51 and S52; S6, turn off the heating power, cool, turn off the nitrogen, and remove.
Need to check novelty before this filing date? Find Prior Art