High-purity germanium polycrystal preparation process and special equipment

Abstract

The invention relates to a detector-grade high-purity germanium polycrystal preparation process and special equipment thereof. The process comprises two parts of cleanness of a raw material germanium ingot and zone-melting equipment and zone-melting purification. The special equipment comprises a base, a trolley track, a trolley, a quartz pipe and a quartz pipe bracket, wherein the raw material germanium ingot is arranged in the quartz pipe; a high-frequency heating coil is fixed to the trolley; and the high-frequency heating coil is a double-layer coil with the width of 1-3cm and surrounds outside the quartz pipe. The reactant and the zone-melting equipment in the invention are both subjected to strict physical and chemical cleaning, the purity of cleaning liquid is high, the reaction process is always carried out in an ultraclean working platform, and the purity requirement on the reactant and the reaction environment is high, so that a precondition is provided for manufacturing high-purity products; a narrow melting zone structure is adopted in the zone-melting process and moves to heat for zone-melting so that the heat quantity is concentrated, the dephlegmation effect of impurities in the zone-melting process is greatly improved, and the purifying efficiency is improved; and the product purity is further improved through repeated zone melting.

Description

technical field [0001] The invention relates to a detector-level high-purity germanium polycrystal preparation process and special equipment for the process. Background technique [0002] High-purity germanium polycrystalline is a detector-grade 12-13N high-purity zone-melted polycrystalline ingot prepared by using the zone-melted germanium ingot produced by the existing semiconductor germanium industry through a special zone melting process. The 12-13N high-purity germanium single crystal has opened up the highest-purity germanium series products in my country's germanium industry, and provided the technical and material basis for the independent innovation of high-purity germanium detectors in the field of nuclear radiation detection in my country. The gamma-ray detector made of high-purity germanium single crystal has the best resolution among all gamma-ray detectors with energy resolution <0.2%. The net impurity concentration of this detector-grade germanium single cr...

AI Technical Summary

Problems solved by technology

Because it is difficult to avoid the re-doping of impurities in various materials and equipment in a complex chemical environment, so in theory to achieve 12 to 13 nines, only the use of physical purification, special process zone melting purification and single crystal pulling means, no relevant technical reports have been found so far

Images