CN109262159A - A kind of cryomagnetism solder and preparation method thereof - Google Patents
A kind of cryomagnetism solder and preparation method thereof Download PDFInfo
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- CN109262159A CN109262159A CN201811030255.7A CN201811030255A CN109262159A CN 109262159 A CN109262159 A CN 109262159A CN 201811030255 A CN201811030255 A CN 201811030255A CN 109262159 A CN109262159 A CN 109262159A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
- B23K35/24—Selection of soldering or welding materials proper
- B23K35/26—Selection of soldering or welding materials proper with the principal constituent melting at less than 400 degrees C
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/40—Making wire or rods for soldering or welding
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Abstract
The present invention relates to a kind of cryomagnetism solders and preparation method thereof；The preparation method is to be heated to being completely melt by solder matrix, cooling is put into closed environment, covering solution is added to closed environment, the covering solution need to submerge the solder matrix, it is heated to after the solder matrix melts completely, magnetic phase particle is added into gained molten system, until whole fusings, cooling to obtain the final product；The magnetism phase particle is selected from one or more of iron powder, cobalt powder, nickel powder, iron cobalt nickel alloy powder；The dosage of the magnetism phase particle accounts for the cryomagnetism solder total weight 0.1%~15%.Preparation method of the invention effectively reduces alloy secondary oxidation caused by melting mechanical stirring；It is not limited to currently used iron powder, nickel powder etc.；Magnetic-particle can largely be mixed into molten alloy and can effectively be uniformly distributed, and improve the utilization rate of magnetic phase particle；Mixed solution can also reuse, and effectively reduce cost；Hybrid reaction is rapid, and production efficiency is greatly improved.
Description
Technical field
The present invention relates to electronic device welding and surface encapsulation Material Field more particularly to a kind of cryomagnetism solder and its
Preparation method.
Background technique
The conventional solder of use for electronic products is tin-lead solder (about 183 DEG C of fusing point), because of it with good welding performance and
Service performance and it is with a long history.In recent years, electronics manufacturing is grown rapidly, and lead contamination is on the rise, and becomes influence health of people
A big public hazards.Therefore, the comprehensive unleaded of electronics manufacturing is carried out, is to reduce environmental pollution, promotes green manufacturing competitiveness
Inevitable measure.In addition, the excessively high brazing temperature of conventional solder may also cause the damage of chip and electronic device.
For example, being 130 DEG C or less with heat resisting temperature for the semiconductor element with Peltier element etc.
General electronic component compare, have lower heat resistance, the low electronic component of such heat resistance is (hereinafter referred to as low being brazed
Heat resistance part) when, brazing temperature certainly must be lower than 130 DEG C.It is generally believed that brazing temperature is with the liquidus curve of the solder used
Temperature+20~40 DEG C are advisable, and therefore, are brazed the solder of low heat-resisting part, liquidus temperature must be near 90 DEG C, i.e.,
80~100 DEG C are necessary for, is the key that solve the problems, such as this using low temperature solder materials.
Chinese patent CN 201110361214.8 discloses a kind of magnetic particle tin-zinc matrix composite solder and its preparation side
Method.Being made by for the ferrous powder granules of nickel plating to be mixed into tin-zinc base solder powder of the magnetism solder makes and obtains, it is necessary first to
Ferrous powder granules are plated to the nickel layer of one layer of 1~3 μ m-thick by the way of chemical nickel plating, then by tin-zinc base welding powder and nickel-clad iron
Powder is proportionally added into smelting furnace and mixes and obtain.This method processing technology is more complex, and nickel layer thickness cannot protect in manufacturing process
Card is uniform, but also handy welding powder makes, and increases cost.
The solder base that Chinese patent CN 201310002553.6 discloses a kind of fabricated in situ magnetism phase particle is compound
Solder and preparation method thereof.The magnetism solder is that addition manganese and bismuth form manganese bismuth and be mutually used as magnetic material, and when production needs first general
It is equipped with tin-manganese intermediate alloy, then by tin-manganese intermediate alloy and the common melting of Sn-Bi parent metal, is needed when cooling according to certain
Condition cooling be made.This method has that production process complexity, magnetic-particle are not necessarily uniformly mixed.
Chinese patent CN 201410406921.8 discloses a kind of preparation method of magnetic solder.This method is only simple
Ground, which describes, mixes magnetic-particle, scaling powder and melt solder, and specific information is fuzzy.
Summary of the invention
No matter made at present using outside plus by the way of compound, powder remelting or In-situ reaction in magnetic solder research field
There is more complex manufacture craft, higher cost, the limited problem of used magnetic phase particle material in magnetic solder.
To solve the above problems, it is an object of the invention to propose it is a kind of there is simple process, magnetic-particle to be uniformly mixed,
The preparation method of the low-temperature environment-friendly magnetism solder compared with multiple types magnetism phase particle can be mixed.
A method of cryomagnetism solder is prepared, is to be heated to being completely melt by solder matrix, cooling is put to closed appearance
In device, covering solution is added to the closed container, the covering solution need to submerge the solder matrix, be heated to the solder
After matrix melts completely, magnetic phase particle is added into gained molten system, until nonmagnetic phase particle exists in solution, it is cooling
To obtain the final product；
The magnetism phase particle is selected from iron powder, cobalt powder, nickel powder, iron cobalt nickel alloy powder, sendust powder, alnico alloy
One or more of powder, molybdenum permalloy powder；More preferable cobalt powder.The dosage of the magnetism phase particle accounts for the magnetic phase particle
With the 0.1%~15% of solder matrix total weight.
Preferably, the dosage of the magnetic phase particle accounts for the 0.5%~10.0% of the cryomagnetism solder total weight.
Method proposed by the invention, it is similar with " the endocytosis effect " that cell swallows outer boundry particle using solution endocytosis method,
The particle of surrounding efficiently can be swallowed body in the effect by electric field or chemical substance by the molten system in solution environmental
It is interior, alloy secondary oxidation problem caused by melting mechanical stirring can be effectively reduced.And it can be with a variety of magnetic phases of endocytosis
Grain, is not limited only to currently used iron powder, nickel powder etc..
The partial size of preparation method of the present invention, the magnetism phase particle is 0.1~50 μm；It is preferred that 10-30 μm.
Preparation method of the present invention, it is preferable that the covering solution is acid solution of the pH value less than 6；This field
Technical staff is appreciated that when magnetic phase particle is added into gained molten system, need to be stirred continuously reinforcing molten system and gulp down
The speed of magnetic phase particle is bitten, until nonmagnetic phase particle exists in solution.
It is further preferred that the acid solution is the HCl solution of 0.1mol/L~2.0mol/L, 0.1mol/L~2.0mol/L
H2SO4The H of solution, 0.1mol/L~2.0mol/L3PO4One or more mixtures of solution.Most preferably, the acid solution
It is the HCl solution of 1.0mol/L or the H of 0.5mol/L2SO4The H of solution and 1.0mol/L3PO4Solution is according to 2:(1-3) ratio
Mixed solution made of proportion.
Using acid solution as covering solution, there are the quick magnetic phase particle reaction of phagocytosis, molten system and magnetic phase
The advantages of grain surface oxide layer easily removes.Above-mentioned covering solution magnetic phase particle preferably is selected from iron powder, cobalt powder etc. and is easily oxidized
The situation of magnetic phase particle.
Or,
Preferably, the covering solution is the neutral solution that pH is equal to 7；Preferably, adding into gained molten system
When entering magnetic phase particle, the DC voltage of 2~30V need to be applied to the molten system；Apply voltage in the solution and constitute electric field,
Because electrowetting effect enhances the wetability of molten system, to strengthen molten system to the phagocytosis speed of extraneous magnetic phase particle
Degree.
It is further preferred that the neutral solution is the NaCl solution of 0.1mol/L~2.0mol/L；
Using neutral solution as covering solution, there is magnetism that is easy to make, being readily transported, the removal of oxide layer difficulty can be swallowed
The advantages of phase particle.When pH value is 7, magnetism phase particle preferably is selected from the situation of cobalt powder, nickel powder, iron cobalt nickel alloy powder etc..
Or,
Preferably, the covering solution is the alkaline solution that pH is greater than 7；Preferably, adding into gained molten system
When entering magnetic phase particle, it need to add again and be equivalent to the alumina particles that the solder matrix weight ratio is 0.1%~5%.The aluminium
The selection of grain can be by those skilled in the art in arbitrarily selecting in normal ranges.
It is highly preferred that the alkaline solution is the NaOH solution of 0.1mol/L~2.0mol/L.
Using alkaline solution as covering solution, there are easily removal molten system surface oxide layer or impurity, enhancing molten mass
The advantage of system and magnetic phase surface activity.
When pH value is greater than 7, magnetism phase particle preferably is selected from cobalt powder, sendust powder, alnico alloy powder, molybdenum slope
The not situation of alloyed powder.
In preparation method of the present invention, the solder matrix is selected from one or more of bismuthino, indium base, tinbase, choosing
With the acceptable solder matrix in this field.
Preparation method of the present invention is to be added in smelting furnace to be mixed and heated to by solder to be completely melt, mixes
Stirring keeps the temperature 30-60min, is cooled to room temperature taking-up and puts into container.
Preparation method of the present invention, the cryomagnetism solder after cooling are cleaned with clear water.
Preparation method proposed by the invention is effectively reduced and is closed caused by melting mechanical stirring using solution endocytosis method
Golden secondary oxidation problem；Currently used iron powder, nickel powder etc. can be not limited only to a variety of magnetic phase particles of endocytosis；Magnetic-particle
Major part can be mixed into molten alloy and can effectively evenly Dispersed precipitate, improve the utilization rate of magnetic phase particle；Mixing
Solution afterwards can also reuse, and effectively reduce cost；Hybrid reaction is rapid, and magnetic can be completed in 5 seconds under agitation
Property phase particle mixing, greatly increase the production efficiency.
The present invention provides above-mentioned any one technical solution preparation-obtained magnetic solder together.
Preferably, magnetic solder proposed by the invention, (preferably fusing point is at 74 DEG C at 60 DEG C~150 DEG C for melting range
More than), and/or, (preferably magnetic induction is in 0.4T or more) in 0.05T or more for magnetic induction.
A kind of low-temperature environment-friendly magnetism solder, including low-temperature environment-friendly solder matrix and magnetic phase particle, the low-temperature environment-friendly
Solder matrix includes bismuthino, indium base, tinbase etc..The magnetic phase particle is the Dispersed precipitate in low-temperature environment-friendly solder matrix
Micron particles, wherein the weight percent that magnetic phase particle accounts for the cryomagnetism solder is 0.1%~15%, remaining is low
Warm environment-friendly soldering matrix.Preferred content is 0.1%~10.0%.
The magnetic phase particle is magnetic material powder, for example iron powder, cobalt powder, nickel powder, iron cobalt nickel alloy powder, iron sial close
Bronze, alnico alloy powder, molybdenum permalloy powder etc., the partial size of the magnetic phase particle are 0.1~50 μm；And the prior art
In, need when preparation the partial size for requiring magnetic phase particle between 10-35um, but according to preparation means provided herein,
The use scope that partial size can then be widened significantly, is detached from the limitation of the prior art.
The present invention provides above-mentioned solder for the application in welding technique, semiconductor welding field together.
Magnetic solder has many possible new applications, such as can pass through alternating magnetic field three as a kind of new solder
Dimension control welding, and this solder is selectively heated, only melt this solder itself, and the material of surrounding can be in peace
Full temperature；Furthermore, it is possible to carry out remote welding with externally-applied magnetic field control, therefore it can enter the position for being difficult to reach, example
Such as narrow vertical channel, which means that magnetic field can be applied by solder fusing, endpoint is connected, thus prosthetic device
The connection that the inside disconnects；In addition, just solder can be extracted easily using magnetic tweezers, is brought greatly just to the clamping of solder
Benefit, the especially welding field of micro devices in the semiconductor industry.
The beneficial effects of the present invention are: the introducing method of magnetic-particle is endocytosis method, the mechanical stirring for comparing ordinary solder is mixed
It closes and is had the considerable advantage that using the cryomagnetism solder that intermediate magnetic alloy molten is mixed with
1, the present invention uses solution endocytosis method, effectively reduces alloy secondary oxidation problem caused by melting mechanical stirring；
2, due to using solution endocytosis method, currently used iron powder, nickel can be not limited only to a variety of magnetic phase particles of endocytosis
Powder etc.；
3, due to using solution endocytosis method, magnetic-particle can largely be mixed into molten alloy and can effectively evenly more
Distribution is dissipated, the utilization rate of magnetic phase particle is improved；
4, mixed solution can also reuse, and effectively reduce cost；
5, hybrid reaction is rapid, and magnetic phase particle mixing can be completed in 5 seconds under agitation, greatly improve production
Efficiency.
Detailed description of the invention
Fig. 1 is the embodiment of the present invention 1: acidity covering solution solder makes structural schematic diagram；
Fig. 2 is the embodiment of the present invention 2: neutrality covering solution solder makes structural schematic diagram；
Fig. 3 is the embodiment of the present invention 3: alkalinity covering solution solder makes structural schematic diagram；
Fig. 4 is the scanning electron microscope image of low-temperature environment-friendly magnetism solder prepared by the embodiment of the present invention 1.
Appended drawing reference:
Close crucible 1；Close crucible lid 2；Cover solution 3；Stirring 4；Cobalt powder 5；Cryomagnetism solder 6；Direct current 7；Aluminium
Particle 8.
Specific embodiment
The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention..
Embodiment 1
Incorporated by reference to attached drawing 1, for the present embodiment using acid covering solution 3, selected acid covering solution 3 is 0.5mol/L's
H2SO4Solution, the cobalt powder 5 that selected magnetism phase particle is 23 μm.The solder matrix of selected solder is Sn46-In12-Bi42.
Steps are as follows for preparation method:
(1) the component of the low-temperature environment-friendly solder of 99.5%wt is weighed according to the proportion, and is added in smelting furnace and has been mixed and heated to
Running down is mixed, and keeps the temperature 30min, is cooled to room temperature taking-up and puts into close crucible 1；
(2) the H of 0.5mol/L is prepared2SO4Cover solution 3；
(3) by the H of 0.5mol/L2SO4Covering solution 3 is added in close crucible 1, the H of the 0.5mol/L2SO4Covering
Solution 3 is added with a thickness of 10mm；
(4) heating fills low-temperature environment-friendly solder matrix and covers the close crucible 1 of solution 3, until solder matrix is completely molten
Melt；
(5) the cobalt powder 5 for weighing 0.5%wt according to the proportion is put into heating close crucible 1, and is constantly stirred until not having
There is cobalt powder 5 remaining；
(6) mixed cryomagnetism solder 6 is cooled down, cryomagnetism solder 6 is taken out and is rinsed well with clear water to get institute
The low-temperature environment-friendly magnetism solder needed.
Embodiment 2
Incorporated by reference to attached drawing 2, for the present embodiment using neutral covering solution 3, selected neutral covering solution 3 is 0.1mol/L's
NaCl solution, the cobalt powder 5 that selected magnetism phase particle is 23 μm.The solder matrix of selected solder is In-Bi33.
Steps are as follows for preparation method:
(1) the solder matrix of the low-temperature environment-friendly solder of 98%wt is weighed according to the proportion, and is added in smelting furnace and is mixed and heated to
It is completely melt, is mixed, keep the temperature 30min, be cooled to room temperature taking-up and put into close crucible 1；
(2) the NaCl for preparing 0.1mol/L covers solution 3；
(3) the NaCl covering solution 3 of 0.1mol/L is added in close crucible 1, the NaCl covering of the 0.1mol/L is molten
Liquid 3 is added with a thickness of 20mm；
(4) heating fills the close crucible 1 of low-temperature environment-friendly solder matrix and the NaCl covering solution 3 of 0.1mol/L, until weldering
Material matrix melts completely；
(5) the cobalt powder 5 for weighing 1.0%wt according to the proportion is put into heating close crucible 1, is covered to the NaCl of 0.1mol/L
Solution 3 applies 3V direct current 7, and is constantly stirred until, disconnection 3V direct current 7 remaining without cobalt powder 5；
(6) mixed cryomagnetism solder 6 is cooled down, cryomagnetism solder 6 is taken out and is rinsed well with clear water to get institute
The low-temperature environment-friendly magnetism solder needed.
Embodiment 3
Incorporated by reference to attached drawing 3, the present embodiment is using alkalinity covering solution 3, the NaOH that selected alkalinity covering solution 3 is 1mol/L
Solution, the cobalt powder 5 that selected magnetism phase particle is 23 μm.The solder matrix of selected solder is Sn-In51-Bi33.
Steps are as follows for preparation method:
(1) the solder matrix of the low-temperature environment-friendly solder of 95%wt is weighed according to the proportion, and is added in smelting furnace and is mixed and heated to
It is completely melt, is mixed, keep the temperature 30min, be cooled to room temperature taking-up and put into close crucible 1；
(2) the NaOH for preparing 1mol/L covers solution 3；
(3) the NaOH covering solution 3 of 1mol/L is added in close crucible 1, the NaOH of the 1mol/L covers solution 3
It is added with a thickness of 15mm；
(4) heating fills the close crucible 1 of low-temperature environment-friendly solder matrix and the NaOH covering solution 3 of 1mol/L, until solder
Matrix melts completely；
(5) the cobalt powder 5 for weighing 5.0%wt according to the proportion is put into heating close crucible 1, weighs the aluminium that 0.5%wt is added
Particle 8, and be constantly stirred until remaining without cobalt powder 5；
(6) mixed cryomagnetism solder 6 is cooled down, cryomagnetism solder 6 is taken out and is rinsed well with clear water to get institute
The low-temperature environment-friendly magnetism solder needed.
Embodiment 4
Incorporated by reference to attached drawing 1, for the present embodiment using acid covering solution 3, selected acid covering solution 3 is mixed in 2:1 ratio
The H of the 0.5mol/L of conjunction2SO4The H of solution and 1.0mol/L3PO4Solution, the cobalt powder 5 that selected magnetism phase particle is 23 μm.It is selected
The solder matrix of solder is Sn46-In12-Bi42.
Steps are as follows for preparation method:
(1) the component of the low-temperature environment-friendly solder of 99.5%wt is weighed according to the proportion, and is added in smelting furnace and has been mixed and heated to
Running down is mixed, and keeps the temperature 30min, is cooled to room temperature taking-up and puts into close crucible 1；
(2) the H of the 0.5mol/L mixed in 2:1 ratio is prepared2SO4The H of solution and 1.0mol/L3PO4Solution is as covering
Solution 3；
(3) by the H of the 0.5mol/L mixed in 2:1 ratio2SO4The H of solution and 1.0mol/L3PO4Solution covers solution 3 and adds
Enter into close crucible 1, the H of the 0.5mol/L2SO4Solution 3 is covered to be added with a thickness of 10mm；
(4) heating fills low-temperature environment-friendly solder matrix and covers the close crucible 1 of solution 3, until solder matrix is completely molten
Melt；
(5) the cobalt powder 5 for weighing 0.5%wt according to the proportion is put into heating close crucible 1, and is constantly stirred until not having
There is cobalt powder 5 remaining；(6) mixed cryomagnetism solder 6 is cooled down, cryomagnetism solder 6 is taken out and is rinsed well with clear water, i.e.,
Obtain required low-temperature environment-friendly magnetism solder.
Comparative example 1
This comparative example provides a kind of cryomagnetism solder and preparation method thereof, and the difference with embodiment 1 is only that, will be described
The H of 0.5mol/L2SO4Replace with the nitric acid of 1mol/L.
Comparative example 2
This comparative example provides a kind of cryomagnetism solder and preparation method thereof, and the difference with embodiment 2 is only that, will be described
The NaCl of 0.1mol/L replaces with the potassium chloride of 0.1mol/L.
Comparative example 3
This comparative example provides a kind of cryomagnetism solder and preparation method thereof, and the difference with embodiment 3 is only that, will be described
The NaOH solution of 1mol/L replaces with the KOH solution of 1mol/L.
Test example 1
The spreading area measurement result such as table 1 of embodiment 1,2,3,4 (measure the wetability of solder in Ovenized electric furnace
Can, sample quality 0.2g, 150 DEG C of test temperature, soaking time 60s sprawls test specimen by GB/T11364-2008 standard system
It is standby.)
Table 1
The spreading area for measuring traditional Sn46-In12-Bi42 solder simultaneously is 47.52mm2, it is seen that of the invention sprawls face
The more traditional Sn46-In12-Bi42 solder of product has biggish promotion.
At 85 DEG C, in the case of applying 18.5MPa stress, the average creep rupture life of embodiment 1-4 is as shown in table 2.Together
When measure Sn46-In12-Bi42 solder the average creep service life be 260min.
It can be seen that croop property of the invention is more much better than traditional bismuth indium tin solder.
Table 2
Solder welding point shear strength test carries out on LLOYD universal testing machine, loading speed 0.01mm/
S, maximum tension shear-type load are 2500N, and the average measurements of embodiment 1,2,3,4 are as shown in table 3.Sn46- is measured simultaneously
In12-Bi42 solder average shear strength is 18MPa.It can be seen that shear strength of the invention is more much better than traditional bismuth indium tin solder.
Actual measurement embodiment 1-4, the fusing point and magnetic induction of comparative example 1-3, as shown in table 4.
Table 3
Table 4
Test example 2
In conjunction with attached drawing 4, after resulting low-temperature environment-friendly magnetism solder prepared by embodiment 1 is amplified 400 times, it can be seen that 23
μm cobalt powder in solder matrix distribution uniform.
The cobalt powder of the preparation-obtained low-temperature environment-friendly magnetism solder of embodiment 2-4 distributed effect phase in solder matrix
When.
Although above having used general explanation, specific embodiment and test, the present invention is made to retouch in detail
It states, but on the basis of the present invention, it can be made some modifications or improvements, this is apparent to those skilled in the art
's.Therefore, these modifications or improvements without departing from theon the basis of the spirit of the present invention, belong to claimed
Range.
Claims (10)
1. a kind of method for preparing cryomagnetism solder, which is characterized in that solder matrix is heated to being completely melt, it is cooling put to
In closed environment, covering solution is added to closed environment, the covering solution need to submerge the solder matrix, be heated to the weldering
After material matrix melts completely, magnetic phase particle is added into gained molten system, until whole fusings, cooling to obtain the final product；
It is described magnetism phase particle be selected from iron powder, cobalt powder, nickel powder, iron cobalt nickel alloy powder, sendust powder, alnico alloy powder,
One or more of molybdenum permalloy powder；The dosage of the magnetism phase particle accounts for the cryomagnetism solder total weight
0.1%~15%.
2. the method according to claim 1, wherein the partial size of the magnetism phase particle is 0.1~50 μm；It is preferred that
10~30 μm；
And/or the dosage of the magnetic phase particle accounts for the 0.5%~10.0% of the cryomagnetism solder total weight.
3. method according to claim 1 or 2, which is characterized in that the covering solution is that acidity of the pH value less than 6 is molten
Liquid；It is preferred that need to be stirred continuously when magnetic phase particle is added into gained molten system and strengthen the magnetic phase of molten system phagocytosis
The speed of grain, until nonmagnetic phase particle exists in solution.
4. according to the method described in claim 3, it is characterized in that, the acid solution is 0.1mol/L~2.0mol/L's
The H of HCl solution, 0.1mol/L~2.0mol/L2SO4The H of solution, 0.1mol/L~2.0mol/L3PO4One kind of solution is more
Kind mixture；
It is preferred that the magnetism phase particle is selected from one or both of iron powder, cobalt powder.
5. method according to claim 1 or 2, which is characterized in that the covering solution is the neutral solution that pH is equal to 7；
It is preferred that the DC voltage of 2~30V need to be applied to the molten system when magnetic phase particle is added into gained molten system；
It is further preferred that the neutral solution is the NaCl solution of 0.1mol/L~2.0mol/L；
And/or the magnetic phase particle is selected from cobalt powder, nickel powder, iron cobalt nickel alloy powder.
6. method according to claim 1 or 2, which is characterized in that the covering solution is the alkaline solution that pH is greater than 7；
It is preferred that when magnetic phase particle is added into gained molten system, it need to add being equivalent to the solder matrix weight ratio and be again
0.1%~5% alumina particles；
It is further preferred that the alkaline solution is the NaOH solution of 0.1mol/L~2.0mol/L；
And/or the magnetic phase particle is selected from cobalt powder, sendust powder, alnico alloy powder, molybdenum permalloy powder.
7. method according to claim 1-6, which is characterized in that the solder matrix is selected from bismuthino, indium base, tin
One or more of base.
8. a kind of cryomagnetism solder, which is characterized in that be prepared by the described in any item methods of claim 1-7.
9. cryomagnetism solder according to claim 8, which is characterized in that its melting range at 60 DEG C~150 DEG C, and/
Or, magnetic induction is in 0.05T or more.
10. cryomagnetism solder described in claim 8 or 9 is for the application in welding technology field；Preferably, for partly leading
Application in body welding field.
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| CN103071942A (en) * | 2013-01-05 | 2013-05-01 | 张家港市东大工业技术研究院 | Low-temperature solder matrix composite solder for synthesizing magnetic-phase particles in situ and preparation method thereof |
| CN105710555A (en) * | 2014-08-13 | 2016-06-29 | 宁波市鄞州品达电器焊料有限公司 | Magnetic solder |
| CN108085519A (en) * | 2016-11-21 | 2018-05-29 | 云南科威液态金属谷研发有限公司 | A kind of method and its application that micro-nano granules are adulterated into liquid metal |
| CN107583576A (en) * | 2017-09-06 | 2018-01-16 | 云南靖创液态金属热控技术研发有限公司 | A kind of liquid metal microreactor |
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