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A kind of preparation method of tin phosphorus alloy

An alloy and tin flake technology is applied in the field of preparation of tin-phosphorus alloys, which can solve the problems of insufficient content, poor anti-oxidation effect, and inability to exert anti-oxidation well, and achieve the effect of broad application prospects.

Active Publication Date: 2019-07-05
GUANGZHOU BOSHIDA NEW MATERIAL
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Problems solved by technology

During production, the amount of phosphorus added is generally 1.6%. During the production process, phosphorus vapor escapes due to high temperature, so that the phosphorus content in the final product tin-phosphorus alloy is insufficient. The phosphorus content in the current finished alloy is about 0.08%, the anti-oxidation effect is poor, and the anti-oxidation effect cannot be well exerted

Method used

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preparation example Construction

[0023] The preparation method of tin phosphorus alloy of the present invention comprises the following steps:

[0024] S1. Melting tin with a purity of 99.99% to make a circular tin sheet with a thickness of 0.3-0.5 mm and a diameter of 150 mm;

[0025] After S2, 150# flat-bottomed graphite crucible is preheated to 200 ℃, the red phosphorus of 3kg purity ≥ 99.9%, the 20kg round tin sheet that step S1 makes, and 2kg active carbon are bottom-up in described flat-bottomed graphite crucible Lay the lower activated carbon layer, the alternately laid tin sheet layer and red phosphorus layer, and the upper activated carbon layer, wherein the weight of the upper layer of activated carbon is 1kg, and the weight of the lower layer of activated carbon is 1kg; after pressing the tin sheet layer and the red phosphorus layer tightly, use refractory mud The crucible is sealed;

[0026] S3. Put the crucible loaded in step S2 into the coke furnace, turn on the blower to heat to 600°C, react f...

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Abstract

The invention relates to the field of metal materials, and discloses a preparation method of a tin phosphorus alloy. The preparation method of the tin phosphorus alloy comprises the following steps: (S1) 20 weight parts of tin pieces, 3 weight parts of phosphrous and 2 weight parts of activated carbons are sealed after layered pavement; (S2) a mixture obtained in the step (S1) is heated to 1500 DEG C within 90 min for reaction by 30 min, and then, is cooled to 1000 DEG C for reaction by 20 min; (S3) the mixture obtained in the step (S2) is rotated by 5 min; and (S4) the mixture obtained in the step (S3) is cooled to form the tin phosphorus alloy. Finally, the phosphorus content in the alloy reaches 4% to satisfy the oxidation resisting effect in use to achieve broad application prospect.

Description

technical field [0001] The invention relates to the field of metal materials, in particular to a preparation method of tin-phosphorus alloy. Background technique [0002] In the electronic assembly industry, the temperature of solder when used is as high as 260°C to 280°C. At such temperatures, tin solder is highly susceptible to oxidation. In order to solve the problem of solder oxidation, it is necessary to add an anti-oxidation alloy that can delay solder oxidation during the production of tin solder. At present, the anti-oxidation alloys used in the production of solder bars in the tin solder industry are mainly tin-phosphorus alloys. [0003] The alloy of tin-phosphorus is mainly obtained by high-temperature steam method of tin and red phosphorus. During production, the amount of phosphorus added is generally 1.6%. During the production process, phosphorus vapor escapes due to high temperature, so that the phosphorus content in the final product tin-phosphorus alloy ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C13/00C22C1/02
CPCC22C1/02C22C13/00
Inventor 周桥均周辉
Owner GUANGZHOU BOSHIDA NEW MATERIAL
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