A mixed metal powder for shingling conductive adhesive and preparation method thereof

Abstract

The invention discloses a mixed metal powder for shingling conductive adhesive and a preparation method thereof. The mixed metal powder is mainly composed of flake silver powder, metal hydride and zinc sulfate, and the zinc sulfate is filled on the surface of the metal hydride The gap where the flaky silver powder is not completely deposited and coated; the content of the flaky silver powder is 4.95-89.94%; the average particle diameter of the mixed metal powder is 0.1-20 μm; the preparation method includes weighing the flaky silver powder in proportion, Metal hydride and zinc sulfate raw materials are mixed together, terpineol, coating agent and grinding beads are added, sand milled, filtered and dried to obtain mixed metal powder for shingling conductive adhesive. The preparation method provided by the invention has a simple process, and the use of sand milling can shorten the production cycle, thereby reducing production costs, and can realize mass production; the silver content of the mixed metal powder provided by the invention is reduced, thereby reducing costs and at the same time overcoming the existing problems. Silver migration caused by pure silver powder; in addition, it also overcomes the defect that the existing silver-clad copper shingled conductive adhesive is easy to oxidize.

Description

technical field

[0001] The invention relates to the technical field of metal powder processing, in particular to a mixed metal powder used for shingling conductive adhesive and a preparation method thereof. Background technique

[0002] With the technological development of components in the photovoltaic industry, new types of photovoltaic components represented by shingled technology are increasingly recognized by the market. At the same time, the technology of shingled conductive adhesive, the key material for photovoltaic shingled modules, has also developed rapidly. The traditional conductive powder for shingling conductive adhesive is generally silver powder or silver-coated copper powder. The shingling conductive adhesive using silver powder is expensive, and pure silver powder is prone to silver migration, resulting in a slight lack of overall performance in terms of weather resistance. Although the cost of silver-clad copper shingled conductive adhesive has advantag...

Examples

preparation example Construction

[0019] The present invention also proposes a method for preparing mixed metal powder for shingling conductive adhesive, comprising the following steps:

[0020] S1: Weigh (6~85)% flake silver powder, (10~90)% metal hydride and (0.1~10)% zinc sulfate by weight percentage, and mix them evenly to obtain a metal mixture; according to the ratio The prepared mixed metal powder has low preparation cost and excellent electrical conductivity, and can better overcome the problems of silver migration and oxidation caused by the existing pure silver powder.

[0021] Preferably, the purity of the flake silver powder, metal hydride and zinc sulfate are all ≥99%, and raw materials with high purity can ensure that the final product has low impurity content, so that the performance is better.

[0022] Preferably, the average particle size of the flaky silver powder is 0.3 ~ 10mm, if the particle size of the silver powder is too large, it will be difficult to chemically deposit or coat the surf...

Embodiment 1

[0033] This embodiment provides a mixed metal powder for shingling conductive adhesive, the mixed metal powder is composed of silver powder, metal hydride and zinc sulfate, the silver powder content is 74.89%; the average particle size of the mixed metal powder is 5mm .

[0034] This embodiment also provides a method for preparing mixed metal powder for shingling conductive adhesive, including the following steps:

[0035] S1: Weigh 12 kg of silver powder, 3 kg of bismuth hydride and 1 kg of zinc sulfate, and mix them uniformly to obtain a metal mixture;

[0036] S2: Add 8 kg of terpineol to the metal mixture, then add 0.5 kg of resin L (Hunan Unico Chemical Technology Co., Ltd.) and 16 kg of zirconia beads (particle size: 1 mm), and perform sanding for 30 minutes to obtain a mixture liquid;

[0037] S3: Filter the mixed material liquid and dry it at 60° C. for 30 minutes to obtain mixed metal powder for shingling conductive adhesive.

Embodiment 2

[0039]This embodiment provides a mixed metal powder for shingling conductive adhesive, the mixed metal powder is composed of silver powder, metal hydride and zinc sulfate, the silver powder content is 83.81%; the average particle size of the mixed metal powder is 6mm .

[0040] This embodiment also provides a method for preparing mixed metal powder for shingling conductive adhesive, including the following steps:

[0041] S1: Weigh 13 kg of silver powder, 2 kg of titanium hydride and 0.5 kg of zinc sulfate, and mix them uniformly to obtain a metal mixture;

[0042] S2: Add 15 kg of terpineol to the metal mixture, then add 0.2 kg of resin L (Hunan Unico Chemical Technology Co., Ltd.), 0.55 kg of butyl butyrate and 50 kg of zirconia beads (0.6mm) for sanding 5min, obtain mixed material liquid;

[0043] S3: Filter the mixed material liquid and dry it at 70° C. for 20 minutes to obtain mixed metal powder for shingling conductive adhesive.

technical field

[0001] The invention relates to the technical field of metal powder processing, in particular to a mixed metal powder used for shingling conductive adhesive and a preparation method thereof. Background technique

[0002] With the technological development of components in the photovoltaic industry, new types of photovoltaic components represented by shingled technology are increasingly recognized by the market. At the same time, the technology of shingled conductive adhesive, the key material for photovoltaic shingled modules, has also developed rapidly. The traditional conductive powder for shingling conductive adhesive is generally silver powder or silver-coated copper powder. The shingling conductive adhesive using silver powder is expensive, and pure silver powder is prone to silver migration, resulting in a slight lack of overall performance in terms of weather resistance. Although the cost of silver-clad copper shingled conductive adhesive has advantag...

Examples

preparation example Construction

[0019] The present invention also proposes a method for preparing mixed metal powder for shingling conductive adhesive, comprising the following steps:

[0020] S1: Weigh (6~85)% flake silver powder, (10~90)% metal hydride and (0.1~10)% zinc sulfate by weight percentage, and mix them evenly to obtain a metal mixture; according to the ratio The prepared mixed metal powder has low preparation cost and excellent electrical conductivity, and can better overcome the problems of silver migration and oxidation caused by the existing pure silver powder.

[0021] Preferably, the purity of the flake silver powder, metal hydride and zinc sulfate are all ≥99%, and raw materials with high purity can ensure that the final product has low impurity content, so that the performance is better.

[0022] Preferably, the average particle size of the flaky silver powder is 0.3 ~ 10mm, if the particle size of the silver powder is too large, it will be difficult to chemically deposit or coat the surf...

Embodiment 1

[0033] This embodiment provides a mixed metal powder for shingling conductive adhesive, the mixed metal powder is composed of silver powder, metal hydride and zinc sulfate, the silver powder content is 74.89%; the average particle size of the mixed metal powder is 5mm .

[0034] This embodiment also provides a method for preparing mixed metal powder for shingling conductive adhesive, including the following steps:

[0035] S1: Weigh 12 kg of silver powder, 3 kg of bismuth hydride and 1 kg of zinc sulfate, and mix them uniformly to obtain a metal mixture;

[0036] S2: Add 8 kg of terpineol to the metal mixture, then add 0.5 kg of resin L (Hunan Unico Chemical Technology Co., Ltd.) and 16 kg of zirconia beads (particle size: 1 mm), and perform sanding for 30 minutes to obtain a mixture liquid;

[0037] S3: Filter the mixed material liquid and dry it at 60° C. for 30 minutes to obtain mixed metal powder for shingling conductive adhesive.

Embodiment 2

[0039]This embodiment provides a mixed metal powder for shingling conductive adhesive, the mixed metal powder is composed of silver powder, metal hydride and zinc sulfate, the silver powder content is 83.81%; the average particle size of the mixed metal powder is 6mm .

[0040] This embodiment also provides a method for preparing mixed metal powder for shingling conductive adhesive, including the following steps:

[0041] S1: Weigh 13 kg of silver powder, 2 kg of titanium hydride and 0.5 kg of zinc sulfate, and mix them uniformly to obtain a metal mixture;

[0042] S2: Add 15 kg of terpineol to the metal mixture, then add 0.2 kg of resin L (Hunan Unico Chemical Technology Co., Ltd.), 0.55 kg of butyl butyrate and 50 kg of zirconia beads (0.6mm) for sanding 5min, obtain mixed material liquid;

[0043] S3: Filter the mixed material liquid and dry it at 70° C. for 20 minutes to obtain mixed metal powder for shingling conductive adhesive.

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