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MOFs carbonized product, preparation method and application to modification of lead-free solder

A lead-free solder and product technology, applied in the field of materials, can solve the problems of limitation of modification effect, increase of composite solder defects, affecting the performance of matrix solder, etc., and achieve the effect of avoiding agglomeration

Active Publication Date: 2020-11-03
CHINA UNIV OF MINING & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the addition of phases can improve the overall performance of the composite solder to a certain extent, however, the addition of nanoparticles is an unstable process. The effect is not only limited but also affects the performance of the base solder

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0018] A kind of preparation method of the lead-free solder modifier based on MOFs carbonization product of the present invention, comprises the following steps:

[0019] (1) Preparation of MOFs;

[0020] Mix the nitrate as the metal particle source, the organic ligand, and the liquid as the reaction condition according to the molar ratio of 1:(4-16):(4-16), and ultrasonically stir the mixed solution at room temperature for 10-20min; Then put the solution into a reaction kettle and place it in an oven at a temperature of 100-150°C for 12-24h, centrifuge and filter the resulting precipitate with absolute ethanol, and finally dry it under an environment of 70-100°C for 12-24h , to obtain the dodecahedral, layered or flake MOFs powder with a particle size of 100nm-1μm.

[0021] (2) Carbonization treatment:

[0022] Put the MOFs powder obtained in step (1) in the tube furnace to set the temperature rise curve, make the tube furnace heat up at 3-6°C / min under the protection of ar...

Embodiment 1

[0030] (1) Synthesis of ZIF-67

[0031] Weigh 0.5gCo(NO 3 ) 2 ·6H 2 O was dissolved in 50mL deionized water to form A solution; 2-methylimidazole and triethylamine (TEA) were weighed and dissolved in 50mL deionized water to form B solution; A and B solutions were ultrasonically stirred for 10min and then mixed; wherein, Co (NO 3 ) 2 ·6H 2 The molar ratio of O, 2-methylimidazole and triethylamine (TEA) is 1:16:16; the mixed solution was ultrasonically stirred at room temperature for 10 minutes, and then the solution was placed in a reaction vessel at a temperature of 120°C. After reacting in an oven for 24 hours, the obtained precipitate was centrifuged and filtered with absolute ethanol, and finally placed in an oven at a temperature of 70° C. for 12 hours to obtain ZIF-67 powder.

[0032] (2) Carbonization treatment

[0033] The ZIF-67 powder obtained in step (1) was placed in a tube furnace, and the tube furnace was heated at a rate of 5°C / min under the protection of ...

Embodiment 2

[0037] (1) Synthesis of ZIF-67

[0038] Weigh 0.5gCo(NO 3 ) 2 ·6H 2 O was dissolved in 50mL deionized water to form A solution; 2-methylimidazole and triethylamine (TEA) were weighed and dissolved in 50mL deionized water to form B solution; A and B solutions were ultrasonically stirred for 10min and then mixed; wherein, Co (NO 3 ) 2 ·6H 2The molar ratio of O, 2-methylimidazole and triethylamine (TEA) is 1:16:16; the mixed solution was ultrasonically stirred at room temperature for 10 minutes and then washed 2-3 times with deionized water, and then the solution was loaded into The reaction kettle was placed in an oven at a temperature of 100°C for 18 hours, the obtained precipitate was centrifuged and filtered with absolute ethanol, and finally dried in an oven at a temperature of 70°C for 12 hours to obtain ZIF-67 powder.

[0039] (2) Carbonization treatment

[0040] The ZIF-67 powder obtained in step (1) was placed in a tube furnace, and the tube furnace was heated at ...

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Abstract

The invention discloses an MOFs carbonized product, a preparation method and application to modification of a lead-free solder. The preparation method of the MOFs carbonized product comprises the following steps that step 1, nitrate as a metal particle source, organic ligands and liquid as a reaction condition are mixed, a mixed solution is subjected to ultrasonic stirring reaction, then the mixedsolution is loaded into a reaction kettle to be placed into a drying oven for reaction, obtained precipitates are centrifuged and filtered through absolute ethyl alcohol, and finally drying is conducted to obtain MOFs powder in a dodecahedral, lamellar or flaky shape; and step 2, the MOFs powder obtained in the step 1 is carbonized in a tubular furnace to obtain the MOFs carbonized product. The MOFs carbonized product can be applied to modification of the lead-free solder. Nano Ni particles or Co particles are coated with the carbon material organic ligands to obtain a modifier in a special shape, the agglomeration phenomenon is greatly reduced or avoided after the modifier is fused with the lead-free solder, and the modification effect of the modifier is given to full play.

Description

technical field [0001] The invention belongs to the technical field of materials, in particular to a preparation method and application of a lead-free solder modifier based on MOFs carbonization products. Background technique [0002] In the production process of electronic products, it is an indispensable link to realize the connection between electronic components and substrates. Microelectronic welding technology is the core component of electronic packaging and assembly technology. Lead-containing solder and lead alloy coating have long been widely used as basic materials for the interconnection of electronic products, but the toxicity of lead and lead compounds has brought serious harm to the environment and human body. Therefore, the development and application of lead-free solder has become a hot topic in the industry, and has great application prospects in electronic packaging. [0003] During the brazing process, intermetallic compounds are generated between the su...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/363B23K35/40
CPCB23K35/36B23K35/40
Inventor 委福祥林波张绪平隋艳伟戚继球何叶增孟庆坤
Owner CHINA UNIV OF MINING & TECH
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