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High purity gallium finished product ingot cast forming method

A molding method and high-purity technology, applied in the field of high-purity gallium ingot casting, can solve the problems of high-purity gallium ingot appearance deformity, increased static friction, difficulty in demoulding, etc. The effect of reducing molding costs

Active Publication Date: 2013-01-16
桐乡乐维新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to its cold expansion characteristics, if the curing is severe, wrinkles and cracks are likely to occur. The current method of deep freezing and curing with a large temperature difference will cause the appearance of high-purity gallium ingots to be deformed and the phase will be deteriorated.
At the same time, the volume increases during curing, which will increase the static friction between the mold and the mold, making it difficult to demould

Method used

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  • High purity gallium finished product ingot cast forming method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The finished product of high-purity gallium with a purity of 99.9999% is placed in an environment with a temperature of 35°C for 2 hours at a constant temperature, so that the temperature difference between the inside and outside is uniform and consistent with the ambient temperature; 15g of high-purity gallium solid particles with a purity of 99.9999% are used to grind them into powder, and the diameter of the powder is 0.1 mm, so that the solid gallium powder is adsorbed on the inner wall of the forming mold, and 1g of powder is adsorbed in each mold; the temperature of the mold is kept at 5°C, and 1kg of liquid high-purity gallium that has been kept at a constant temperature of 35°C is poured into the mold; the mold together with the injected liquid High-purity gallium, placed in a freezer at a freezing temperature of 5°C and kept at a constant temperature for 10 hours; take out the mold and place it in an environment with a temperature of 25°C for half an hour; when t...

Embodiment 2

[0032] The finished product of high-purity gallium with a purity of 99.99999% is placed in an environment with a temperature of 40°C for 2 hours at a constant temperature to eliminate the temperature difference between the inside and outside of the liquid high-purity gallium, making the inside and outside uniform and consistent with the ambient temperature; use 20g of 99.99999% high-purity gallium solid particles, The powder is made by grinding in a plastic container, and the diameter of the powder is 0.5mm; the powder is rubbed inside the molding mold to make the solid gallium powder adsorb on the inner wall of the molding mold, and 1g of powder is adsorbed in each mold; keep the temperature of the mold at 10°C, and Pour 900g of liquid high-purity gallium at a constant temperature of 40°C into the mold. At this temperature, the seeds will not be melted; place the mold together with the injected liquid high-purity gallium in a freezer at a freezing temperature of 10°C and a cons...

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Abstract

The invention discloses a high purity gallium finished product ingot cast forming method, characterized by comprising the following steps of: placing finished product liquid high purity gallium in an environment at the constant temperature of 35-40 DEG C for several hours; producing high purity gallium solid particles with the same purity grade as the above high purity gallium into powder to be adsorbed on the inner wall of a forming mold; keeping the mold at the temperature of 5-10 DEG C, pouring the liquid high purity gallium into the mold and weighing the same; placing the mold, in which the liquid high purity gallium is injected, into a freezer until all the liquid high purity gallium becomes solid; after all the liquid high purity gallium becomes solid, taking out the mold and placing the mold in an environment at the constant temperature of 23-25 DEG C for 0.5-1 hour; and when temperature of the outer surface of the mold is measured to drop to 20-22 DEG C, reversing the mold, so that the solid gallium automatically comes out of the mold to obtain the formed high purity gallium ingot, placing the ingot in a dustless, low-humidity and oxygen-free glove box, blowing off surface condensation water, and packaging the ingot. According to the invention, the surface of the high purity gallium ingot has no crease, is good in smoothness and excellent in appearance quality; the reliability of solidification forming is guaranteed; the labor intensity of demolding is reduced; and the high purity gallium finished product ingot cast forming method is suitable for industrial production at an increased scale.

Description

technical field [0001] The invention relates to a high-purity gallium finished ingot forming method. Background technique [0002] High-purity gallium, with a melting point of 29.8°C, especially when the purity reaches 99.9999% (6N), has obvious supercooling properties, that is, it is difficult to solidify and solidify when the temperature is lower than its melting point for a long time. For the convenience of transportation, storage and use of high-purity gallium, it is generally kept in a solid state. In addition, high-purity gallium is generally required to form a regular ingot-shaped shape of a cuboid. At present, in order to solidify liquid gallium into a solid state, it is often necessary to freeze the liquid gallium in an environment of minus 30°C for a long time, and it takes up to 3 days to induce spontaneous solidification. [0003] Due to the supercooling of high-purity gallium, it has caused considerable difficulties for rapid modern production. In addition, h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D7/00
Inventor 康云飞乔文钟晓露
Owner 桐乡乐维新材料有限公司