CN104480510A - Preparation method of secondary concentrator reflective film - Google Patents
Preparation method of secondary concentrator reflective film Download PDFInfo
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- CN104480510A CN104480510A CN201410675269.XA CN201410675269A CN104480510A CN 104480510 A CN104480510 A CN 104480510A CN 201410675269 A CN201410675269 A CN 201410675269A CN 104480510 A CN104480510 A CN 104480510A
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- preparation
- arc oxidation
- aluminum alloy
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- reflectance coating
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D11/00—Electrolytic coating by surface reaction, i.e. forming conversion layers
- C25D11/02—Anodisation
- C25D11/04—Anodisation of aluminium or alloys based thereon
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D11/00—Electrolytic coating by surface reaction, i.e. forming conversion layers
- C25D11/02—Anodisation
- C25D11/04—Anodisation of aluminium or alloys based thereon
- C25D11/06—Anodisation of aluminium or alloys based thereon characterised by the electrolytes used
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D11/00—Electrolytic coating by surface reaction, i.e. forming conversion layers
- C25D11/02—Anodisation
- C25D11/04—Anodisation of aluminium or alloys based thereon
- C25D11/16—Pretreatment, e.g. desmutting
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D11/00—Electrolytic coating by surface reaction, i.e. forming conversion layers
- C25D11/02—Anodisation
- C25D11/04—Anodisation of aluminium or alloys based thereon
- C25D11/18—After-treatment, e.g. pore-sealing
Abstract
The invention discloses a preparation method of a secondary concentrator reflective film, and relates to a preparation method of a reflective film, aiming at solving the problems of poor binding force, low reflectivity, short service life and the like of a secondary concentrator aluminum-alloy-surface reflective film prepared by virtue of an existing method. The preparation method comprises the following steps: I. carrying out surface pretreatment on aluminum alloy, implementing ultrasonic treatment, cleaning the aluminum alloy by virtue of distilled water and drying the aluminum alloy; II. adding the dried aluminum alloy in a micro-arc oxidation electrolytic bath, and preparing a dense ceramic film layer on the surface of the aluminum alloy under an arc discharge action of high voltage and low current; III. sealing the aluminum alloy in distilled water after micro-arc oxidation; and IV. polishing the sealed ceramic film, thus the preparation of the reflective film is completed. The reflective film disclosed by the invention is high in binding force which is more than 35MPAa, high in sunlight reflectivity which is more than 95% within a spectrum range from 500nm to 2000nm, controllable in thickness within 5-80microns, good in ultraviolet radiation resistance and the like.
Description
Technical field
The present invention relates to a kind of preparation method of alumina ceramic membrane, particularly relate to a kind of preparation method of secondary condenser reflectance coating, be specifically related to a kind of preparation method being applied to the secondary condenser reflectance coating of condensation photovoltaic module.
Background technology
Along with the aggravation of exhaustion and the environmental pollution day by day of traditional energy, sun power has become a kind of new forms of energy of great exploitation potential for its.In field of solar energy utilization, solar photovoltaic technology is the Solar use mode most with application prospect, solar photovoltaic technology has now become countries in the world and to have tried to be the first one of the important topic of research, and the emphasis of research is the photoelectric transformation efficiency how improving solar cell, and how to reduce the cost of photovoltaic generation.Current most widely used solution introduces condensing apparatus exactly in solar energy photovoltaic system, namely takes concentration photovoltaic system to realize the technology of photovoltaic generation.
Current, take Fresnel lens as the transmission-type condensing apparatus production in enormous quantities with low cost with it, easy of representative, facilitate the plurality of advantages such as integrated, be at home and abroad widely used.But through Fresnel lens high power concentrator and the hot spot that formed can produce focus because of the uneven Uniform of optically focused, easy Yin Wendu is too high and damage solar cell, greatly will reduce the photoelectric transformation efficiency of solar cell like this, reduce battery, therefore need to equip secondary condenser.And the performance of secondary condenser reflectance coating directly has influence on the spotlight effect of whole condensing apparatus, so the efficiency of solar cell and life-span.
At present, secondary condenser reflectance coating often adopts anode oxidation method to prepare, and this film exists the shortcomings such as bonding force difference, reflectivity be low.Bonding force difference directly causes the secondary condenser life-span short, the low photoelectric efficiency not only reducing condensing apparatus of reflectivity, and causes condensing apparatus to generate heat, and adds the heat radiation difficulty of condensation photovoltaic module.Therefore, the processing method that research is new is badly in need of, to meet service requirements.
Summary of the invention
The present invention in order to solve existing anode oxidation method shortcoming of preparing that the bonding force that reflectance coating exists is poor, reflectivity is low etc., and provides a kind of preparation method of secondary condenser reflectance coating.
The present invention is achieved through the following technical solutions:
A preparation method for secondary condenser reflectance coating, comprises the following steps:
One, adopt electrochemical deoiling technique to carry out surface preparation to aluminium alloy, then with distilled water cleaning, then put into acetone soln supersound process 1 ~ 10min, through distilled water cleaning post-drying;
Two, the aluminium alloy processed through step one after drying is placed in the differential arc oxidation electrolyzer containing micro-arc oxidation electrolyte, pulse mao power source is adopted to power, under constant-current mode, carry out differential arc oxidation reaction, obtain the fine and close aluminum alloy ceramic film of differential arc oxidation in aluminum alloy surface; Wherein, micro-arc oxidation electrolyte is dissolved in the water is made by SODIUM PHOSPHATE, MONOBASIC, potassium hydroxide, Sodium Fluoride, quadrol, in electrolytic solution, the concentration of SODIUM PHOSPHATE, MONOBASIC is 3 ~ 30g/L, the concentration of potassium hydroxide is 0.1 ~ 10g/L, the concentration of Sodium Fluoride is 0.1 ~ 10g/L, and the concentration of quadrol is 2 ~ 20ml/L;
Three, the aluminum alloy ceramic film of acquisition is placed in the distilled water of pH value 5 ~ 7, temperature 90 ~ 100 DEG C, carries out the sealing pores of 3 ~ 30min;
Four, the aluminum alloy ceramic film after sealing pores is carried out polished finish, namely obtain secondary condenser reflectance coating.
In step 2, the condition of differential arc oxidation is that current density controls at 1 ~ 20A/dm
2, frequency is 50 ~ 2000Hz, and dutycycle is 5% ~ 45%.
In step 2, micro-arc oxidation electrolyte temperature is 5 ~ 50 DEG C, and the reaction times is 5 ~ 50min.
Described micro-arc oxidation electrolyte temperature is by refrigeration cycle water management.
Described electrochemical deoiling technique processes 2 ~ 5min under temperature is the condition of 70 ~ 90 DEG C, and degreaser is dissolved in the water by sodium carbonate and water glass and makes, and in degreaser, the concentration of sodium carbonate is 30 ~ 60g/L, and the concentration of water glass is 30 ~ 60g/L.
Dry in step one is be the condition process 10min of 90 ~ 100 DEG C in temperature.
Described polished finish adopts 300 ~ 700 object waterproof abrasive papers to carry out, until the smooth finish of ceramic membrane reaches Ra0.2 ~ 0.4.
Compared with prior art, the present invention has following useful technique effect:
The present invention obtains secondary condenser reflectance coating by differential arc oxidization technique in aluminum alloy surface, and technique is simple, processing efficiency is high, environmental protection, and gained ceramic reflecting film is primarily of Al
2o
3ceramic phase is formed, and has bonding force and is greater than 35MPa; Sunlight reflectivity is high, in 500 to 2000nm spectral range internal reflection rate more than 95%; Thicknesses of layers can control, and 5 ~ 80 μm controlled; The advantages such as resistance to uv irradiation is good.
Accompanying drawing explanation
Fig. 1 is the phase composition X-ray diffractogram of the ceramic reflecting film that in embodiment one, aluminum alloy surface obtains, the formation mainly Al of visible reflectance film
2o
3ceramic phase (crystalline form is α and γ two kinds), the Mg in addition containing minute quantity
4si
5o
18.
The spot intensity distribution plan of solar battery surface when Fig. 2 is non reflecting film;
Fig. 3 is the spot intensity distribution plan of solar battery surface when having reflectance coating.
Embodiment
Below in conjunction with specific embodiment, the present invention is described in further detail, and the explanation of the invention is not limited.
Embodiment one:
The preparation method of secondary condenser reflectance coating provided by the invention, comprise the following steps: one, adopt electrochemical deoiling technique to carry out surface preparation to aluminium alloy, then with distilled water cleaning, then acetone soln supersound process 2min is put into, through distilled water cleaning post-drying;
Two, the aluminium alloy processed through step one after drying is placed in the differential arc oxidation electrolyzer containing micro-arc oxidation electrolyte, pulse mao power source is adopted to power, differential arc oxidation reaction is carried out under constant-current mode, the fine and close aluminum alloy ceramic film of differential arc oxidation is obtained in aluminum alloy surface, also dry with distilled water cleaning after taking-up; Wherein, micro-arc oxidation electrolyte in step 2 differential arc oxidation electrolyzer is dissolved in the water is made by SODIUM PHOSPHATE, MONOBASIC, potassium hydroxide, Sodium Fluoride, quadrol, in electrolytic solution, the concentration of SODIUM PHOSPHATE, MONOBASIC is 3g/L, the concentration of potassium hydroxide is 8g/L, the concentration of Sodium Fluoride is 6g/L, and the concentration of quadrol is 20ml/L.In step 2, the condition of differential arc oxidation is that current density controls at 1 ~ 20A/dm
2, frequency is 50 ~ 2000Hz, and dutycycle is 5% ~ 45%, and electrolyte temperature is 5 ~ 50 DEG C, and the reaction times is 5 ~ 50min.
Three, the aluminum alloy ceramic film of acquisition is placed in the distilled water of pH value 6, temperature 100 DEG C, carries out the sealing pores of 30min;
Four, the aluminum alloy ceramic film after sealing pores is carried out polished finish, namely complete the preparation of reflectance coating.
Electrochemical deoiling technique in present embodiment step one processes 2 ~ 5min under temperature is the condition of 70 ~ 90 DEG C, degreaser is dissolved in the water by sodium carbonate and water glass and makes, in degreaser, the concentration of sodium carbonate is 30 ~ 60g/L, and the concentration of water glass is 30 ~ 60g/L.
Dry in present embodiment step one is be the condition process 10min of 100 DEG C in temperature.
In present embodiment step 2, electrolyte temperature is by refrigeration cycle water management.
The object of present embodiment step 3 be to differential arc oxidation after aluminium alloy carry out sealing of hole.
In present embodiment step 4, polishing adopts 300 ~ 700 object waterproof abrasive papers to carry out, until the smooth finish of ceramic membrane reaches Ra0.2 ~ 0.4.
See Fig. 1, Fig. 2, Fig. 3, Fig. 1 is the phase composition X-ray diffractogram of the ceramic reflecting film that in embodiment one, aluminum alloy surface obtains, the formation mainly Al of visible reflectance film
2o
3ceramic phase (crystalline form is α and γ two kinds), the Mg in addition containing minute quantity
4si
5o
18.Fig. 2,3 be without, have a reflectance coating time, solar battery surface spot intensity distribution plan, visible adopt reflectance coating after spot intensity distribution consistency degree obtain and improve greatly.
Embodiment two:
Present embodiment and embodiment one are process 5min under temperature is the condition of 80 DEG C unlike step one electrochemical deoiling technique, degreaser is dissolved in the water by sodium carbonate and water glass and makes, in degreaser, the concentration of sodium carbonate is 40g/L, and the concentration of water glass is 50g/L.Other step and parameter identical with embodiment one.
Embodiment three:
Present embodiment and embodiment two are that current density controls at 20A/dm unlike the condition of differential arc oxidation in step 2
2, frequency is 2000Hz, and dutycycle is 45%.In step 2, micro-arc oxidation electrolyte temperature is 50 DEG C, and the reaction times is 50min, then also dry with distilled water cleaning.Other step and parameter identical with embodiment two.
Embodiment four:
Present embodiment and embodiment two are that current density controls at 4A/dm unlike the condition of differential arc oxidation in step 2
2, frequency is 600Hz, and dutycycle is 35%, and electrolyte temperature is 25 DEG C, and the reaction times is 10min, then also dry with distilled water cleaning.Other step and parameter identical with embodiment two.
Embodiment five:
Present embodiment and embodiment three are 10g/L unlike the concentration of SODIUM PHOSPHATE, MONOBASIC in step 2 electrolytic solution, and the concentration of potassium hydroxide is 2g/L, and the concentration of Sodium Fluoride is 1g/L, and the concentration of quadrol is 10ml/L.Other step and parameter identical with embodiment three.
Embodiment six:
Present embodiment and embodiment four are 15g/L unlike the concentration of SODIUM PHOSPHATE, MONOBASIC in step 2 electrolytic solution, and the concentration of potassium hydroxide is 3g/L, and the concentration of Sodium Fluoride is 2g/L, and the concentration of quadrol is 10ml/L.Other step and parameter identical with embodiment four.
Embodiment seven:
Present embodiment and embodiment four are 15g/L unlike the concentration of SODIUM PHOSPHATE, MONOBASIC in step 2 electrolytic solution, and the concentration of potassium hydroxide is 4g/L, and the concentration of Sodium Fluoride is 3g/L, and the concentration of quadrol is 15ml/L.Other step and parameter identical with embodiment four.
Embodiment eight:
One, adopt electrochemical deoiling technique to carry out surface preparation to aluminium alloy, then with distilled water cleaning, then put into acetone soln supersound process 5min, after distilled water cleaning, under temperature is the condition of 90 DEG C, dry 10min; Electrochemical deoiling technique in step one processes 3min under temperature is the condition of 70 DEG C, and degreaser is dissolved in the water by sodium carbonate and water glass and makes, and in degreaser, the concentration of sodium carbonate is 45g/L, and the concentration of water glass is 30g/L;
Two, the aluminium alloy processed through step one after drying is placed in the differential arc oxidation electrolyzer containing micro-arc oxidation electrolyte, pulse mao power source is adopted to power, under constant-current mode, carry out differential arc oxidation reaction, obtain the fine and close aluminum alloy ceramic film of differential arc oxidation in aluminum alloy surface; Wherein, micro-arc oxidation electrolyte in step 2 differential arc oxidation electrolyzer is dissolved in the water is made by SODIUM PHOSPHATE, MONOBASIC, potassium hydroxide, Sodium Fluoride, quadrol, in electrolytic solution, the concentration of SODIUM PHOSPHATE, MONOBASIC is 18g/L, the concentration of potassium hydroxide is 5g/L, the concentration of Sodium Fluoride is 5g/L, and the concentration of quadrol is 11ml/L.In step 2, the condition of differential arc oxidation is that current density controls at 10A/dm
2, frequency is 1025Hz, and dutycycle is 25%.In step 2, micro-arc oxidation electrolyte temperature is 26 DEG C, and the reaction times is 26min.
Three, the aluminum alloy ceramic film of acquisition is placed in the distilled water of pH value 7, temperature 95 DEG C, carries out the sealing pores of 17min.
Four, the aluminum alloy ceramic film after sealing pores is carried out polished finish, namely complete the preparation of reflectance coating.
Embodiment nine:
One, adopt electrochemical deoiling technique to carry out surface preparation to aluminium alloy, then with distilled water cleaning, then put into acetone soln supersound process 10min, after distilled water cleaning, under temperature is the condition of 95 DEG C, dry 10min; Electrochemical deoiling technique in step one processes 5min under temperature is the condition of 80 DEG C, and degreaser is dissolved in the water by sodium carbonate and water glass and makes, and in degreaser, the concentration of sodium carbonate is 60g/L, and the concentration of water glass is 45g/L;
Two, the aluminium alloy processed through step one after drying is placed in the differential arc oxidation electrolyzer containing micro-arc oxidation electrolyte, pulse mao power source is adopted to power, under constant-current mode, carry out differential arc oxidation reaction, obtain the fine and close aluminum alloy ceramic film of differential arc oxidation in aluminum alloy surface; Wherein, micro-arc oxidation electrolyte in step 2 differential arc oxidation electrolyzer is dissolved in the water is made by SODIUM PHOSPHATE, MONOBASIC, potassium hydroxide, Sodium Fluoride, quadrol, in electrolytic solution, the concentration of SODIUM PHOSPHATE, MONOBASIC is 30g/L, the concentration of potassium hydroxide is 10g/L, the concentration of Sodium Fluoride is 10g/L, and the concentration of quadrol is 20ml/L.In step 2, the condition of differential arc oxidation is that current density controls at 1A/dm
2, frequency is 50Hz, and dutycycle is 5%.In step 2, micro-arc oxidation electrolyte temperature is 5 DEG C, and the reaction times is 5min.
Three, the aluminum alloy ceramic film of acquisition is placed in the distilled water of pH value 5, temperature 90 DEG C, carries out the sealing pores of 3min.
Four, the aluminum alloy ceramic film after sealing pores is carried out polished finish, namely complete the preparation of reflectance coating.
The advantage of gained ceramic reflecting film of the present invention has: bonding force is high, is greater than 35MPa; Sunlight reflectivity is high, in 500 to 2000nm spectral range internal reflection rate more than 95%; Thicknesses of layers can control, and 5 ~ 80 μm controlled; Resistance to uv irradiation is good.
More than show and describe ultimate principle of the present invention and principal character and advantage of the present invention.The technician of the industry should understand; the present invention is not restricted to the described embodiments; what describe in above-described embodiment and specification sheets just illustrates principle of the present invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements all fall in the claimed scope of the invention.Application claims protection domain is defined by appending claims and equivalent thereof.
Claims (7)
1. a preparation method for secondary condenser reflectance coating, is characterized in that, comprises the following steps:
One, adopt electrochemical deoiling technique to carry out surface preparation to aluminium alloy, then with distilled water cleaning, then put into acetone soln supersound process 1 ~ 10min, through distilled water cleaning post-drying;
Two, the aluminium alloy processed through step one after drying is placed in the differential arc oxidation electrolyzer containing micro-arc oxidation electrolyte, pulse mao power source is adopted to power, under constant-current mode, carry out differential arc oxidation reaction, obtain the fine and close aluminum alloy ceramic film of differential arc oxidation in aluminum alloy surface; Wherein, micro-arc oxidation electrolyte is dissolved in the water is made by SODIUM PHOSPHATE, MONOBASIC, potassium hydroxide, Sodium Fluoride, quadrol, in electrolytic solution, the concentration of SODIUM PHOSPHATE, MONOBASIC is 3 ~ 30g/L, the concentration of potassium hydroxide is 0.1 ~ 10g/L, the concentration of Sodium Fluoride is 0.1 ~ 10g/L, and the concentration of quadrol is 2 ~ 20ml/L;
Three, the aluminum alloy ceramic film of acquisition is placed in the distilled water of pH value 5 ~ 7, temperature 90 ~ 100 DEG C, carries out the sealing pores of 3 ~ 30min;
Four, the aluminum alloy ceramic film after sealing pores is carried out polished finish, namely obtain secondary condenser reflectance coating.
2. the preparation method of secondary condenser reflectance coating according to claim 1, it is characterized in that, in step 2, the condition of differential arc oxidation is that current density controls at 1 ~ 20A/dm
2, frequency is 50 ~ 2000Hz, and dutycycle is 5% ~ 45%.
3. the preparation method of secondary condenser reflectance coating according to claim 1 and 2, is characterized in that, in step 2, micro-arc oxidation electrolyte temperature is 5 ~ 50 DEG C, and the reaction times is 5 ~ 50min.
4. the preparation method of secondary condenser reflectance coating according to claim 3, is characterized in that, described micro-arc oxidation electrolyte temperature is by refrigeration cycle water management.
5. the preparation method of secondary condenser reflectance coating according to claim 1, it is characterized in that, described electrochemical deoiling technique processes 2 ~ 5min under temperature is the condition of 70 ~ 90 DEG C, degreaser is dissolved in the water by sodium carbonate and water glass and makes, in degreaser, the concentration of sodium carbonate is 30 ~ 60g/L, and the concentration of water glass is 30 ~ 60g/L.
6. the preparation method of secondary condenser reflectance coating according to claim 1, is characterized in that, drying in step one is be the condition process 10min of 90 ~ 100 DEG C in temperature.
7. the preparation method of secondary condenser reflectance coating according to claim 1, is characterized in that, described polished finish adopts 300 ~ 700 object waterproof abrasive papers to carry out, until the smooth finish of ceramic membrane reaches Ra0.2 ~ 0.4.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1737210A (en) * | 2005-07-12 | 2006-02-22 | 吉林大学 | Electrolytic solution for differential arc oxidization surface treatment of magnesium aluminum alloy in aluminates system |
| CN101210336A (en) * | 2006-12-31 | 2008-07-02 | 比亚迪股份有限公司 | Surface treatment method for light metal material |
| CN101245485A (en) * | 2008-03-21 | 2008-08-20 | 哈尔滨工程大学 | Surface treating method for magnesium lithium alloy |
| CN101634044A (en) * | 2009-09-01 | 2010-01-27 | 李扬德 | Phosphatization and micro-arc oxidation compound treatment method of magnesium alloy surface |
-
2014
- 2014-11-21 CN CN201410675269.XA patent/CN104480510B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1737210A (en) * | 2005-07-12 | 2006-02-22 | 吉林大学 | Electrolytic solution for differential arc oxidization surface treatment of magnesium aluminum alloy in aluminates system |
| CN101210336A (en) * | 2006-12-31 | 2008-07-02 | 比亚迪股份有限公司 | Surface treatment method for light metal material |
| CN101245485A (en) * | 2008-03-21 | 2008-08-20 | 哈尔滨工程大学 | Surface treating method for magnesium lithium alloy |
| CN101634044A (en) * | 2009-09-01 | 2010-01-27 | 李扬德 | Phosphatization and micro-arc oxidation compound treatment method of magnesium alloy surface |
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