CN103044979B - Preparation method for functional power of solar energy absorbed composite coating layer based on chromium-aluminum-manganese oxide - Google Patents

Preparation method for functional power of solar energy absorbed composite coating layer based on chromium-aluminum-manganese oxide Download PDF

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Publication number
CN103044979B
CN103044979B CN201210559544.2A CN201210559544A CN103044979B CN 103044979 B CN103044979 B CN 103044979B CN 201210559544 A CN201210559544 A CN 201210559544A CN 103044979 B CN103044979 B CN 103044979B
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coating
spraying
chromium
raw material
function powder
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CN103044979A (en
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郝勇
张聪林
郝婷婷
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Hao Yong
Qinghai Heng Ming Photoelectric Technology Co Ltd
Electric Power Research Institute of State Grid Qinghai Electric Power Co Ltd
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Abstract

The invention relates to the technical field of solar energy photo-thermal utilization, in particular to a preparation method for functional power of a solar energy absorbed composite coating layer based on chromium-aluminum-manganese oxide. The composite coating layer comprises the following raw materials of a mixed raw material, a bonder and a dispersing agent, which are mixed at the ratio of 500:10:2, wherein the mixed raw material comprises the following components in percentage by mass: 55 percent of chromium oxide, 35 percent of aluminum oxide and 10 percent of manganese chloride tetrahydrate; and the bonder is 1053 silicone resin; and the dispersing agent is glycerine. According to the invention, the functional power prepared by using a spray drying method has excellent flowability and can meet the requirements of plasma spraying on material delivery. A phase structure of the coating layer is stable in selective absorption, can be fixedly combined with a matrix, and has excellent thermal shock resistance both in property and structure.

Description

Based on chromium aluminium Mn oxide function powder solar absorption preparation method of composite coating
Technical field
The present invention relates to solar energy thermal utilization technical field, particularly relate to a kind of based on high temperature solar absorber coatings preparation method in chromium aluminium Mn oxide function powder.
Background technology
Current, under the background that the Nonrenewable energy resources such as fossil are increasingly rare, will there is significant change in world energy sources structure, and sun power will replace conventional energy resources gradually, become indispensable important energy source, and the solar thermal utilization research of sun power has been current focus.Among the generating of Salar light-gathering heat, the solar thermal utilization of high temperature is the development trend of Solar use from now on, wherein the solar energy absorbing coating of coating type is both economical, and the main technical schemes of dealing with problems to develop high performance middle high temperature solar energy selective absorption coating material, its key point to improve the assimilated efficiency of coating to sun power, it also to be made to have lower coatings emissivity, also will solve the high thermal resistance of coating and good cost performance in addition.But present coating type coating all can not solve temperature resistance problem well and take into account good assimilated efficiency and lower emittance problem.
Summary of the invention
The technical problem to be solved in the present invention is the deficiency existed for prior art, provides system a kind of preparation method based on high temperature solar composite coating for absorbing in chromium aluminium Mn oxide function powder.
The present invention's one is achieved by following technical proposals based on chromium aluminium Mn oxide function powder solar absorption preparation method of composite coating: a kind of preparation method based on high temperature solar composite coating for absorbing in chromium aluminium Mn oxide function powder, it is characterized in that coating comprises following mixing raw material: chromium sesquioxide mass ratio 55%, the aluminium sesquioxide 35% of interpolation, tetrahydrate manganese chloride 10%; Binding agent is 1053 silicone resins, and dispersion agent is glycerol, and ratio is mixing raw material: binding agent: dispersion agent=500:10:2;
Described method comprises the steps:
Raw material mixing step by mixing raw material, binding agent, dispersion agent, deionized water with the ratio of 500:10:2:1000 mixing Keep agitation 40-60 minute uniformly slip;
Break-in whipping step slip is put into colloidal mill and carries out wet-milling mixing, each component fully in dispersion slip, stirs 1 hour;
Drying step adopts spray-drying process to prepare function powder, and the intake air temperature of spray-drying tower is set to 160-170 DEG C, and air outlet temperature is set to 40-60 DEG C, and take away pump rotating speed is set to 800r/min, and spraying gun rotating speed is 17000--20000r/min; Slip is sent into spray-drying tower, can function powder be prepared; Its granularity of powder is no more than 50 μm;
Prepare and adopt sol-gel method outside coating, to prepare stannic oxide selectivity through film through film acid adjustment step, using anhydrous stannic chloride as Xi Yuan, dehydrated alcohol is as solvent, and initial soln concentration is 0.5mol/L, and adds appropriate Glacial acetic acid, and adjustment pH value is 4-5;
After substrate is preheated to 90-120 DEG C by spraying function powder step, spraying Ni-Al adhesive linkage; After being again cooled to 90-120 DEG C, spraying chromium aluminium Mn oxide function powder, thickness is 25-30 micron; Coating after clean spraying, prepares SnO 2 thin film in its surface; With 20mm/min speed lift film, dry 20min in 100 DEG C of-120 DEG C of baking ovens, then anneal film sample at 550 DEG C in retort furnace 2h-2.5h, prepares solar absorption compound coating.
The present invention's one has following beneficial effect compared with prior art based on chromium aluminium Mn oxide function powder solar absorption preparation method of composite coating: the function powder that the present invention adopts spray-drying process to prepare, possess good mobility, meet plasma spraying feeding requirement.
Coating specific absorption is greater than 0.89, and emittance is less than 0.06, and take out after 10 minutes with 600 DEG C of insulations in retort furnace, within 5 minutes, air cooling is to room temperature.After 100 thermal shocks, coating structure is complete, and do not come off variable color.High-temperature stability is good, and coating can be used on the solar energy collector under middle hot environment.
The present invention, relative to single (chromium sesquioxide) black chrome coating, possesses better solar selectively absorptive character.
The phase structure of coating, selective absorbing stable performance, be combined with matrix firmly, on performance and structure, all possesses good thermal shock resistance.
Embodiment
Below in conjunction with embodiment, the present invention's one is further described based on chromium aluminium Mn oxide function powder solar absorption preparation method of composite coating technical scheme.
The present invention is a kind of, and based on high temperature solar composite coating for absorbing preparation method in chromium aluminium Mn oxide function powder, described coating comprises following mixing raw material: chromium sesquioxide mass ratio 55%, the aluminium sesquioxide 35% of interpolation, tetrahydrate manganese chloride 10%; Binding agent is 1053 silicone resins, and dispersion agent is glycerol, and ratio is mixing raw material: binding agent: dispersion agent=500:10:2;
Described method comprises the steps:
Raw material mixing step by mixing raw material, binding agent, dispersion agent, deionized water with the ratio of 500:10:2:1000 mixing Keep agitation 40-60 minute uniformly slip;
Break-in whipping step slip is put into colloidal mill and carries out wet-milling mixing, each component fully in dispersion slip, stirs 1 hour;
Drying step adopts spray-drying process to prepare function powder, and the intake air temperature of spray-drying tower is set to 160-170 DEG C, and air outlet temperature is set to 40-60 DEG C, and take away pump rotating speed is set to 800r/min, and spraying gun rotating speed is 17000--20000r/min; Slip is sent into spray-drying tower, can function powder be prepared; Its granularity of powder is no more than 50 μm;
Prepare and adopt sol-gel method outside coating, to prepare stannic oxide selectivity through film through film acid adjustment step, using anhydrous stannic chloride as Xi Yuan, dehydrated alcohol is as solvent, and initial soln concentration is 0.5mol/L, and adds appropriate Glacial acetic acid, and adjustment pH value is 4-5;
After substrate is preheated to 90-120 DEG C by spraying function powder step, spraying Ni-Al adhesive linkage; After being again cooled to 90-120 DEG C, spraying chromium aluminium Mn oxide function powder, thickness is 25-30 micron; Coating after clean spraying, prepares SnO 2 thin film in its surface; With 20mm/min speed lift film, dry 20min in 100 DEG C of-120 DEG C of baking ovens, then anneal film sample at 550 DEG C in retort furnace 2h-2.5h, prepares solar absorption compound coating.
Embodiment 1.
Get 500g mixing raw material, mass ratio is chromium sesquioxide 55%, the aluminium sesquioxide of 35%, the tetrahydrate manganese chloride of 10%.
Get 10g1053 silicone resin, 2-3ml glycerol, 1000ml deionized water and the abundant mix and blend of mixing raw material 40 minutes.
Break-in whipping step slip is put into colloidal mill and carries out wet-milling mixing, each component fully in dispersion slip, stirs 1 hour;
Drying step adopts spray-drying process to prepare function powder, and the intake air temperature of spray-drying tower is set to 160 DEG C, and air outlet temperature is set to 40 DEG C, and take away pump rotating speed is set to 800r/min, and spraying gun rotating speed is 17000r/min; Slip is sent into spray-drying tower, can function powder be prepared; Its granularity of powder is no more than 50 μm;
Prepare and adopt sol-gel method outside coating, to prepare stannic oxide selectivity through film through film acid adjustment step, using anhydrous stannic chloride as Xi Yuan, dehydrated alcohol is as solvent, and initial soln concentration is 0.5mol/L, and adds appropriate Glacial acetic acid, regulates pH value to be 4;
After substrate is preheated to 90 DEG C by spraying function powder step, spraying Ni-Al adhesive linkage; After being again cooled to 90 DEG C, spraying chromium aluminium Mn oxide function powder, thickness is 25 microns; Coating after clean spraying, prepares SnO 2 thin film in its surface; With 20mm/min speed lift film, dry 20min in 100 DEG C of baking ovens, then anneal film sample at 550 DEG C in retort furnace 2h, prepares solar absorption compound coating.
Embodiment 2.
Get 500g mixing raw material, mass ratio is chromium sesquioxide 55%, the aluminium sesquioxide of 35%, the tetrahydrate manganese chloride of 10%.
Get 10g1053 silicone resin, 2-3ml glycerol, 1000ml deionized water and the abundant mix and blend .50 minute of mixing raw material.
Break-in whipping step slip is put into colloidal mill and carries out wet-milling mixing, each component fully in dispersion slip, stirs 1 hour;
Drying step adopts spray-drying process to prepare function powder, and the intake air temperature of spray-drying tower is set to 165 DEG C, and air outlet temperature is set to 50 DEG C, and take away pump rotating speed is set to 800r/min, and spraying gun rotating speed is 18500r/min; Slip is sent into spray-drying tower, can function powder be prepared; Its granularity of powder is no more than 50 μm;
Prepare and adopt sol-gel method outside coating, to prepare stannic oxide selectivity through film through film acid adjustment step, using anhydrous stannic chloride as Xi Yuan, dehydrated alcohol is as solvent, and initial soln concentration is 0.5mol/L, and adds appropriate Glacial acetic acid, regulates pH value to be 4.5;
After substrate is preheated to 105 DEG C by spraying function powder step, spraying Ni-Al adhesive linkage; After being again cooled to 90-120 DEG C, spraying chromium aluminium Mn oxide function powder, thickness is 28 microns; Coating after clean spraying, prepares SnO 2 thin film in its surface; With 20mm/min speed lift film, dry 20min in 110 DEG C of baking ovens, then anneal film sample at 550 DEG C in retort furnace 2.3h, prepares solar absorption compound coating.
Embodiment 3.
Get 500g mixing raw material, mass ratio is chromium sesquioxide 55%, the aluminium sesquioxide of 35%, the tetrahydrate manganese chloride of 10%.
Get 10g1053 silicone resin, 2-3ml glycerol, 1000ml deionized water and the abundant mix and blend of mixing raw material 60 minutes.
Break-in whipping step slip is put into colloidal mill and carries out wet-milling mixing, each component fully in dispersion slip, stirs 1 hour;
Drying step adopts spray-drying process to prepare function powder, and the intake air temperature of spray-drying tower is set to 170 DEG C, and air outlet temperature is set to 60 DEG C, and take away pump rotating speed is set to 800r/min, and spraying gun rotating speed is 20000r/min; Slip is sent into spray-drying tower, can function powder be prepared; Its granularity of powder is no more than 50 μm;
Prepare and adopt sol-gel method outside coating, to prepare stannic oxide selectivity through film through film acid adjustment step, using anhydrous stannic chloride as Xi Yuan, dehydrated alcohol is as solvent, and initial soln concentration is 0.5mol/L, and adds appropriate Glacial acetic acid, regulates pH value to be 5;
After substrate is preheated to 120 DEG C by spraying function powder step, spraying Ni-Al adhesive linkage; After being again cooled to 120 DEG C, spraying chromium aluminium Mn oxide function powder, thickness is 30 microns; Coating after clean spraying, prepares SnO 2 thin film in its surface; With 20mm/min speed lift film, dry 20min in 120 DEG C of baking ovens, then anneal film sample at 550 DEG C in retort furnace 2.5h, prepares solar absorption compound coating.

Claims (1)

1., based on a high temperature solar composite coating for absorbing preparation method in chromium aluminium Mn oxide function powder, it is characterized in that coating comprises following mixing raw material: chromium sesquioxide mass ratio 55%, the aluminium sesquioxide 35% of interpolation, tetrahydrate manganese chloride 10%; Binding agent is 1053 silicone resins, and dispersion agent is glycerol, and ratio is mixing raw material: binding agent: dispersion agent=500:10:2;
Described method comprises the steps:
Raw material mixing step by mixing raw material, binding agent, dispersion agent, deionized water with the ratio of 500:10:2:1000 mixing Keep agitation 40-60 minute uniformly slip;
Break-in whipping step slip is put into colloidal mill and is carried out wet-milling mixing, and each component fully in dispersion slip, stirs 1 hour;
Drying step adopts spray-drying process to prepare function powder, and the intake air temperature of spray-drying tower is set to 160-170 DEG C, and air outlet temperature is set to 40-60 DEG C, and take away pump rotating speed is set to 800r/min, and spraying gun rotating speed is 17000-20000r/min; Slip is sent into spray-drying tower, can function powder be prepared; Its granularity of powder is no more than 50 μm;
Prepare and adopt sol-gel method outside coating, to prepare stannic oxide selectivity through film through film acid adjustment step, using anhydrous stannic chloride as Xi Yuan, dehydrated alcohol is as solvent, and initial soln concentration is 0.5mol/L, and adds appropriate Glacial acetic acid, and adjust ph is 4-5;
After substrate is preheated to 90-120 DEG C by spraying function powder step, spraying Ni-Al adhesive linkage; After being again cooled to 90-120 DEG C, spraying chromium aluminium Mn oxide function powder, thickness is 25-30 micron; Coating after clean spraying, prepares SnO 2 thin film in its surface; With 20mm/min speed lift film, dry 20min in 100 DEG C of-120 DEG C of baking ovens, then anneal film sample at 550 DEG C in retort furnace 2h-2.5h, prepares solar absorption compound coating.
CN201210559544.2A 2012-12-21 2012-12-21 Preparation method for functional power of solar energy absorbed composite coating layer based on chromium-aluminum-manganese oxide Expired - Fee Related CN103044979B (en)

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CN104294270B (en) * 2014-10-16 2016-08-31 太原理工大学 Prepare the new technology of solar selectively absorbing coating
CN109354929A (en) * 2018-08-30 2019-02-19 江苏京展能源科技有限公司 A kind of preparation method of selective solar spectrum composite coating for absorbing

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101273238A (en) * 2005-08-02 2008-09-24 桑斯翠普有限公司 Nickel-alumina coated solar absorbers
CN102093767A (en) * 2010-12-02 2011-06-15 无锡中阳新能源科技有限公司 Medium and high temperature solar selective absorption coating and coating layer and preparation method thereof

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101273238A (en) * 2005-08-02 2008-09-24 桑斯翠普有限公司 Nickel-alumina coated solar absorbers
CN102093767A (en) * 2010-12-02 2011-06-15 无锡中阳新能源科技有限公司 Medium and high temperature solar selective absorption coating and coating layer and preparation method thereof

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Effective date of registration: 20151030

Address after: 810007 No. 33 Minhe Road, Xining Economic Development Zone, Qinghai, Xining

Patentee after: Hao Yong

Patentee after: Electric Power Research Institute of State Grid Qinghai Electric Power Company

Patentee after: Qinghai Heng Ming Photoelectric Technology Co., Ltd.

Address before: 810007 No. 33 Minhe Road, Xining Economic Development Zone, Qinghai, Xining

Patentee before: Hao Yong

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