CN108080816A - A kind of preparation method of stop-off gent for titanium alloy vacuum brazing - Google Patents
A kind of preparation method of stop-off gent for titanium alloy vacuum brazing Download PDFInfo
- Publication number
- CN108080816A CN108080816A CN201711313745.3A CN201711313745A CN108080816A CN 108080816 A CN108080816 A CN 108080816A CN 201711313745 A CN201711313745 A CN 201711313745A CN 108080816 A CN108080816 A CN 108080816A
- Authority
- CN
- China
- Prior art keywords
- oxide powder
- gent
- stop
- mixture
- titanium alloy
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- 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
-
- 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
- B23K35/36—Selection of non-metallic compositions, e.g. coatings, fluxes; Selection of soldering or welding materials, conjoint with selection of non-metallic compositions, both selections being of interest
- B23K35/362—Selection of compositions of fluxes
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacture Of Metal Powder And Suspensions Thereof (AREA)
Abstract
The present invention relates to welding technology fields, it is desirable to provide a kind of preparation method of stop-off gent for titanium alloy vacuum brazing.Including：Mixture one will be obtained after lanthanum oxide powder, nano yttrium oxide powder, micron yttrium oxide powder, styrene-acrylic emulsion and hydroxypropyl methyl cellulose ball milling；After ethylene glycol and deionized water are mixed and stirred for uniformly, add in association type alkali swollen thickener and stir evenly, obtain mixture two；Mixture three is obtained after mixture two and mixture one are stirred；PH to 8 10 is adjusted, the stop-off gent for titanium alloy vacuum brazing is then obtained to room temperature using grinding postcooling.The present invention solves the problems, such as that titanium elements react with the oxide component in stop-off gent and cause the decomposition of stop-off gent oxide component and titanium alloy oxidation stain in the process of titanium alloy vacuum brazing；It can change to avoid carbon in Process of Vacuum Brazing and titanium reaction generation TiC so as to cause the titanium alloy surface property for smearing stop-off gent.
Description
Technical field
The present invention relates to welding technology fields, and in particular to a kind of preparation side of stop-off gent for titanium alloy vacuum brazing
Method.
Background technology
Stop-off gent is to be used for protecting by a kind of material of weldering metal surface in brazing process, is by oxide and bonding
Agent mixes and stable suspension system is made, and can be configured to have suitable viscosity and rheology spy according to the difference for applying technique
Property composition, effect be can under brazing temperature effectively prevent melting solder arbitrarily flowed to the surface that need not be welded
It drops down, and can remove in a certain way after brazing, without polluting and corroding brazing metal.
It is conventional in the process of titanium alloy vacuum brazing since titanium elements are the higher active metal element of activity
The titanium elements in oxide component and titanium alloy in stop-off gent react, and cause the decomposition of stop-off gent oxide component and titanium member
Plain oxidation stain fails so as to cause soldering.In addition, titanium elements can react to form TiC with carbon under the high temperature conditions, if stop-off gent
Component remains more carbon in vacuum environment, then is easy to cause coated base material surface nature and changes, so as to
Influence follow-up use.Therefore, there should be fabulous reactionlessness and less for stop-off gent used in titanium alloy vacuum brazing
Vacuum brazing carbon residual.
The content of the invention
The technical problem to be solved by the present invention is to overcome deficiency of the prior art, provide a kind of for titanium alloy vacuum
The preparation method of the stop-off gent of soldering.
To solve technical problem, solution of the invention is：
A kind of preparation method of the stop-off gent for titanium alloy vacuum brazing is provided, is included the following steps：
(1) each component is weighed by the weight percent：Lanthanum oxide powder 0.02%-0.05%；Nano yttrium oxide powder
5%-15%；Micron yttrium oxide powder 35%-60%；Hydroxypropyl methyl cellulose 0.15%-0.5%；Styrene-acrylic emulsion 4.0%-
9.0%；Association type alkali swollen thickener 1.5%-5%；Ethylene glycol 2%-4%；Deionized water 16%-38.48%；
(2) by lanthanum oxide powder, nano yttrium oxide powder, micron yttrium oxide powder, styrene-acrylic emulsion and hydroxypropyl methyl
Cellulose is added in ball grinder, and postcooling obtains mixture one to room temperature when ball milling 6-12 is small；
(3) after being mixed and stirred for ethylene glycol and deionized water uniformly, add in association type alkali swollen thickener and stir evenly,
Obtain mixture two；
(4) after mixture two being warming up to 65-85 DEG C, addition mixture one, 30-60 minutes postcoolings of stirring to room temperature,
Obtain mixture three；
(5) ammonium hydroxide is added in into mixture three while stirring, adjusts pH to 8-10,5- is then ground using three-roll grinder
15 postcoolings obtain the stop-off gent for titanium alloy vacuum brazing to room temperature.
In the present invention, the grain size of the lanthanum oxide powder is between 25 microns~75 microns.
In the present invention, the grain size of the nano yttrium oxide powder is not more than 100 nanometers.
In the present invention, the grain size of the micron yttrium oxide powder is between 25~75 microns.
In the present invention, the hydroxypropyl methyl cellulose be Ashaland Benecel K200M, Benecel E10M or
At least one of Benecel F4MC type products.
In the present invention, the styrene-acrylic emulsion is to be obtained by styrene units and acrylic ester unit through emulsion copolymerization, propylene
Acid esters unit is 5 with styrene units mass ratio:1~1:1；The solid content of styrene-acrylic emulsion is between 40%-50%.
In the present invention, the association type alkali swollen thickener is the SN- of the ACRYSOLTT-935 or Pu Nuoke of ROHM AND HAAS
At least one of 636 type products.
The realization principle of the present invention：
1st, using the rare-earth oxide (lanthana and yttrium oxide) with reactionlessness as stop-off gent main body into
Point, and pass through a large number of experiments and obtain optimal oxide composition and ratio, it solves in the process of titanium alloy vacuum brazing
The problem of titanium elements are reacted with the oxide component in stop-off gent.
2nd, filtered out by many experiments and more complete polymers compositions is decomposed in Process of Vacuum Brazing as raw material, and
It combines to obtain optimal polymer composition and ratio, stop-off gent provided by the invention carbon residue pole after vacuum brazing by a large number of experiments
It is few.
Compared with prior art, the invention has the advantages that：
1st, stop-off gent provided by the invention solves titanium elements and stop-off gent in the process of titanium alloy vacuum brazing
In oxide component reaction and stop-off gent oxide component is caused to decompose and the problem of titanium alloy oxidation stain；
2nd, due to stop-off gent provided by the invention, carbon residue is few after vacuum brazing, can also avoid vacuum brazing
Carbon and titanium reaction generation TiC, change so as to cause the titanium alloy surface property for smearing stop-off gent in journey.
Specific embodiment
With reference to specific embodiment, the present invention is described in detail.Following embodiment will be helpful to the technology of this field
Personnel further understand the present invention, but the invention is not limited in any way.It should be pointed out that the ordinary skill to this field
For personnel, without departing from the inventive concept of the premise, various modifications and improvements can be made.These belong to the present invention
Protection domain.
Embodiment 1：
It is into being grouped by following weight percent content for the stop-off gent of titanium alloy vacuum brazing：
Lanthanum oxide powder (25 microns~45 microns)：0.02%
Nano yttrium oxide powder (70 nanometers~100 nanometers)：15%
Micron yttrium oxide powder (45 microns~75 microns)：35%
Hydroxypropyl methyl cellulose (AshalandBenecel F4MC)：0.5%
Styrene-acrylic emulsion：4.0%
Association type alkali swollen thickener (ACRYSOL TT-935)：5%
Ethylene glycol：2%
Deionized water：38.48%
The styrene-acrylic emulsion solid content is to be obtained by styrene units and acrylic ester unit through emulsion copolymerization 40%,
Acrylic ester unit is 5 with styrene units mass ratio:1；
The preparation of the stop-off gent, includes the following steps：
(1) each component is weighed by the weight percent；
(2) by lanthanum oxide powder, nano yttrium oxide powder, micron yttrium oxide powder, styrene-acrylic emulsion and hydroxypropyl methyl
Cellulose is added in ball grinder, when ball milling 6 is small, is taken out after being cooled to room temperature, is obtained mixture one；
(3) after being mixed and stirred for ethylene glycol and deionized water uniformly, add in association type alkali swollen thickener and stir evenly,
Obtain mixture two；
(4) after mixture two being warming up to 65 DEG C, mixture one is added in, when stirring 1 is small, and is cooled to room temperature and is mixed
Object three；
(5) ammonium hydroxide is added in into mixture three while stirring, after adjusting PH to 8, is ground 15 times using three-roll grinder, it is cold
But to obtaining the stop-off gent for titanium alloy vacuum brazing after room temperature.
Embodiment 2:
It is into being grouped by following weight percent content for the stop-off gent of titanium alloy vacuum brazing：
Lanthanum oxide powder (45 microns~75 microns)：0.05%
Nano yttrium oxide powder (10 nanometers~40 nanometers)：5%
Micron yttrium oxide powder (25 microns~45 microns)：60%
Hydroxypropyl methyl cellulose (AshalandBenecel E10M)：0.15%
Styrene-acrylic emulsion：9.0%
Association type alkali swollen thickener (SN-636)：1.5%
Ethylene glycol：4%
Deionized water：20.3%
Styrene-acrylic emulsion solid content is to be obtained by styrene units and acrylic ester unit through emulsion copolymerization 50%, propylene
Acid esters unit is 1 with styrene units mass ratio:Between 1；
The preparation of the stop-off gent, includes the following steps：
(1) each component is weighed by the weight percent；
(2) by lanthanum oxide powder, nano yttrium oxide powder, micron yttrium oxide powder, styrene-acrylic emulsion and hydroxypropyl methyl
Cellulose is added in ball grinder, when ball milling 12 is small, is taken out after being cooled to room temperature, is obtained mixture one；
(3) after being mixed and stirred for ethylene glycol and deionized water uniformly, add in association type alkali swollen thickener and stir evenly,
Obtain mixture two；
(4) after mixture two being warming up to 85 DEG C, mixture one is added in, is stirred 30 minutes, and is cooled to room temperature and is mixed
Close object three；
(5) ammonium hydroxide is added in into mixture three while stirring, after adjusting PH to 10, is ground 5 times using three-roll grinder, it is cold
But to obtaining the stop-off gent for titanium alloy vacuum brazing after room temperature.
Embodiment 3:
It is into being grouped by following weight percent content for the stop-off gent of titanium alloy vacuum brazing：
Lanthanum oxide powder (35 microns~55 microns)：0.03%
Nano yttrium oxide powder (40 nanometers~70 nanometers)：10%
Micron yttrium oxide powder (35 microns~55 microns)：50%
Hydroxypropyl methyl cellulose (AshalandBenecel K200M)：0.3%
Styrene-acrylic emulsion：7.0%
(ACRYSOLTT-935 and SN-636 is with mass ratio 1 for association type alkali swollen thickener：1 mixing)：4.0%
Ethylene glycol：3%
Deionized water：25.67%
Styrene-acrylic emulsion solid content is to be obtained by styrene units and acrylic ester unit through emulsion copolymerization 45%, propylene
Acid esters unit is 3 with styrene units mass ratio:1；
The preparation of the stop-off gent, includes the following steps：
(1) each component is weighed by the weight percent；
(2) by lanthanum oxide powder, nano yttrium oxide powder, micron yttrium oxide powder, styrene-acrylic emulsion and hydroxypropyl methyl
Cellulose is added in ball grinder, when ball milling 9 is small, is taken out after being cooled to room temperature, is obtained mixture one；
(3) after being mixed and stirred for ethylene glycol and deionized water uniformly, add in association type alkali swollen thickener and stir evenly,
Obtain mixture two；
(4) after mixture two being warming up to 70 DEG C, mixture one is added in, is stirred 50 minutes, and is cooled to room temperature and is mixed
Close object three；
(5) ammonium hydroxide is added in into mixture three while stirring, after adjusting PH to 9, is ground 10 times using three-roll grinder, it is cold
But to obtaining the stop-off gent for titanium alloy vacuum brazing after room temperature.
Embodiment 4
It is into being grouped by following weight percent content for the stop-off gent of titanium alloy vacuum brazing：
Lanthanum oxide powder (45 microns~75 microns)：0.05%
Nano yttrium oxide powder (10 nanometers~40 nanometers)：9.3%
Micron yttrium oxide powder (25 microns~45 microns)：60%
Hydroxypropyl methyl cellulose (AshalandBenecel E10M)：0.15%
Styrene-acrylic emulsion：9.0%
Association type alkali swollen thickener (SN-636)：1.5%
Ethylene glycol：4%
Deionized water：16%
Styrene-acrylic emulsion solid content is to be obtained by styrene units and acrylic ester unit through emulsion copolymerization 50%, propylene
Acid esters unit is 1 with styrene units mass ratio:Between 1；
The preparation of the stop-off gent, includes the following steps：
(1) each component is weighed by the weight percent；
(2) by lanthanum oxide powder, nano yttrium oxide powder, micron yttrium oxide powder, styrene-acrylic emulsion and hydroxypropyl methyl
Cellulose is added in ball grinder, when ball milling 12 is small, is taken out after being cooled to room temperature, is obtained mixture one；
(3) after being mixed and stirred for ethylene glycol and deionized water uniformly, add in association type alkali swollen thickener and stir evenly,
Obtain mixture two；
(4) after mixture two being warming up to 85 DEG C, mixture one is added in, is stirred 30 minutes, and is cooled to room temperature and is mixed
Close object three；
(5) ammonium hydroxide is added in into mixture three while stirring, after adjusting PH to 10, is ground 5 times using three-roll grinder, it is cold
But to obtaining the stop-off gent for titanium alloy vacuum brazing after room temperature.
Invention effect is verified
1st, the stop-off gent for titanium alloy vacuum brazing that embodiment 1 is prepared, is denoted as sample one.
2nd, the stop-off gent that commercially available product type is taken to be BRAZ-STOP (Vitta corporation), is denoted as sample two.
3rd, the above-mentioned two titanium alloy vacuum brazing of acquisition is brazed stop-off gent product, coating carries out true with titanium alloy surface
Sky soldering；
1) surface carbon residue situation of the observation coated with stop-off gent, test result are as follows after being brazed：
| Sample | Stop-off gent surface carbon residue situation |
| Sample one | It is visible by naked eyes carbon residue |
| Sample two | The visible carbon residue of micro naked eyes |
2) by the oxidization condition of titanium alloy surface of the stop-off gent removal post analysis coated with stop-off gent after being brazed：
| Sample | Titanium alloy surface oxygen content At% after removal stop-off gent after soldering |
| Sample one | 0.61 |
| Sample two | 7.52 |
| Uncoated surface | 0.56 |
By upper table as can be seen that compared with stop-off gent of the prior art, stop-off gent using the present invention can effectively be kept away
The titanium elements exempted from oxide component and titanium alloy in stop-off gent react, and cause the decomposition of stop-off gent oxide component and titanium
Element oxide pollutes.In addition, also there is the stop-off gent of the present invention fabulous reactionlessness and less vacuum brazing carbon to remain,
In contrast technique effect is very significant.
Specific embodiments of the present invention are described above.It is to be appreciated that the invention is not limited in above-mentioned
Particular implementation, those skilled in the art can make various deformations or amendments within the scope of the claims, this not shadow
Ring the substantive content of the present invention.
Claims (7)
1. the preparation method of a kind of stop-off gent for titanium alloy vacuum brazing, which is characterized in that include the following steps：
(1) each component is weighed by the weight percent：Lanthanum oxide powder 0.02%-0.05%；Nano yttrium oxide powder 5%-
15%；Micron yttrium oxide powder 35%-60%；Hydroxypropyl methyl cellulose 0.15%-0.5%；Styrene-acrylic emulsion 4.0%-
9.0%；Association type alkali swollen thickener 1.5%-5%；Ethylene glycol 2%-4%；Deionized water 16%-38.48%；
(2) by lanthanum oxide powder, nano yttrium oxide powder, micron yttrium oxide powder, styrene-acrylic emulsion and hydroxypropyl methyl fiber
Element is added in ball grinder, and postcooling obtains mixture one to room temperature when ball milling 6-12 is small；
(3) after being mixed and stirred for ethylene glycol and deionized water uniformly, add in association type alkali swollen thickener and stir evenly, obtain
Mixture two；
(4) after mixture two being warming up to 65-85 DEG C, mixture one is added in, 30-60 minutes postcoolings of stirring are obtained to room temperature
Mixture three；
(5) ammonium hydroxide is added in into mixture three while stirring, adjusts pH to 8-10, is then ground 5-15 times using three-roll grinder
Postcooling obtains the stop-off gent for titanium alloy vacuum brazing to room temperature.
2. according to the method described in claim 1, it is characterized in that, the grain size of the lanthanum oxide powder 25~75 microns it
Between.
3. according to the method described in claim 1, it is characterized in that, the grain size of the nano yttrium oxide powder is received no more than 100
Rice.
4. according to the method described in claim 1, it is characterized in that, the grain size of the micron yttrium oxide powder is at 25~75 microns
Between.
5. according to the method described in claim 1, it is characterized in that, the hydroxypropyl methyl cellulose is Ashaland
At least one of Benecel K200M, Benecel E10M or Benecel F4MC type products.
6. according to the method described in claim 1, it is characterized in that, the styrene-acrylic emulsion is by styrene units and acrylate
Unit is obtained through emulsion copolymerization, and acrylic ester unit is 5 with styrene units mass ratio:1~1:1；The solid content of styrene-acrylic emulsion
Between 40%-50%.
7. according to the method described in claim 1, it is characterized in that, the association type alkali swollen thickener is ROHM AND HAAS
At least one of SN-636 type products of ACRYSOLTT-935 or Pu Nuoke.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711313745.3A CN108080816B (en) | 2017-12-04 | 2017-12-04 | Preparation method of flow resisting agent for titanium alloy vacuum brazing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711313745.3A CN108080816B (en) | 2017-12-04 | 2017-12-04 | Preparation method of flow resisting agent for titanium alloy vacuum brazing |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108080816A true CN108080816A (en) | 2018-05-29 |
| CN108080816B CN108080816B (en) | 2020-05-19 |
Family
ID=62174664
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711313745.3A Active CN108080816B (en) | 2017-12-04 | 2017-12-04 | Preparation method of flow resisting agent for titanium alloy vacuum brazing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108080816B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110293339A (en) * | 2019-07-06 | 2019-10-01 | 佛山市创渡科技有限公司 | A kind of aqueous solder resist and preparation method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4303570A (en) * | 1978-08-25 | 1981-12-01 | Rockwell International Corporation | Composition for fabricating superplastically formed/diffusion bonded structures |
| CN102182907A (en) * | 2010-12-06 | 2011-09-14 | 中国航空工业集团公司北京航空制造工程研究所 | Titanium alloy I-shaped section corrugation girder and manufacturing method thereof |
| CN102807374A (en) * | 2012-07-12 | 2012-12-05 | 中国电子科技集团公司第五十五研究所 | Solder resist for high-temperature co-fired multilayer ceramic and preparation method of solder resist |
| CN103433648A (en) * | 2013-09-09 | 2013-12-11 | 哈尔滨工业大学 | Easily coated TiO2 solid welding-stop flux for titanium alloy SPF/DB (Super Plastic Forming/Diffusion Bonding) and preparation method thereof |
| CN103497608A (en) * | 2013-10-18 | 2014-01-08 | 烟台德邦科技有限公司 | Resistance welding glue with high strength and quick to dry and preparation method thereof |
-
2017
- 2017-12-04 CN CN201711313745.3A patent/CN108080816B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4303570A (en) * | 1978-08-25 | 1981-12-01 | Rockwell International Corporation | Composition for fabricating superplastically formed/diffusion bonded structures |
| CN102182907A (en) * | 2010-12-06 | 2011-09-14 | 中国航空工业集团公司北京航空制造工程研究所 | Titanium alloy I-shaped section corrugation girder and manufacturing method thereof |
| CN102807374A (en) * | 2012-07-12 | 2012-12-05 | 中国电子科技集团公司第五十五研究所 | Solder resist for high-temperature co-fired multilayer ceramic and preparation method of solder resist |
| CN103433648A (en) * | 2013-09-09 | 2013-12-11 | 哈尔滨工业大学 | Easily coated TiO2 solid welding-stop flux for titanium alloy SPF/DB (Super Plastic Forming/Diffusion Bonding) and preparation method thereof |
| CN103497608A (en) * | 2013-10-18 | 2014-01-08 | 烟台德邦科技有限公司 | Resistance welding glue with high strength and quick to dry and preparation method thereof |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110293339A (en) * | 2019-07-06 | 2019-10-01 | 佛山市创渡科技有限公司 | A kind of aqueous solder resist and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108080816B (en) | 2020-05-19 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP5763869B2 (en) | Flaky silver powder, conductive paste, and method for producing flaky silver powder | |
| EP3505272B1 (en) | Bonding material and bonding method using same | |
| CN102513734B (en) | Method for preparing paste soldering flux | |
| CN104002061B (en) | A kind of high-performance high stable nanometer solder(ing) paste and preparation method thereof | |
| CN104751938B (en) | Conductive paste for solar battery | |
| US20170117422A1 (en) | Silver paste for solar cell and method for making same | |
| JP6154194B2 (en) | Bonding metal paste | |
| CN103177789B (en) | A kind of crystal-silicon solar cell electrocondution slurry and preparation method thereof | |
| WO2021044817A1 (en) | Silver particles | |
| CN108080816A (en) | A kind of preparation method of stop-off gent for titanium alloy vacuum brazing | |
| CN107877037A (en) | A kind of stop-off gent for titanium alloy vacuum brazing | |
| US10821558B2 (en) | Bonding material and bonding method using same | |
| CN108044259B (en) | Preparation method of flow resisting agent for stainless steel vacuum brazing | |
| CN109955005B (en) | High-thixotropy paste forming body for sprayable soldering paste and preparation method thereof | |
| CN111524639B (en) | Electrode silver paste, preparation method and N-type crystalline silicon solar cell | |
| CN107838578A (en) | A kind of water-based preparation method into lotion prepared for the nickel-based solders of paste XHBNi 5 | |
| EP3189914A1 (en) | Bonding material and bonding method using same | |
| CN107151540A (en) | A kind of acrylic ester elastic fluid sealant and preparation method thereof | |
| CN113817373A (en) | Cathode electrophoretic coating and preparation method thereof | |
| US20210346949A1 (en) | Silver nanoparticles | |
| CN101934439A (en) | High activity halogen free soldering paste and making method thereof | |
| CN108098093A (en) | A kind of stop-off gent for stainless-steel vacuum soldering | |
| CN206632363U (en) | A kind of preparation system of the cored solder of zinc-silver boron phosphide system | |
| EP3018170B1 (en) | Readily thermally degradable organic resin binder | |
| CN114014972B (en) | Ketone hydrazine crosslinking system for organic carrier in photovoltaic silver paste |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |