CN102426217A - Solution for measuring sodium silicate content in alkali wool making solution and its application method - Google Patents
Solution for measuring sodium silicate content in alkali wool making solution and its application method Download PDFInfo
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- CN102426217A CN102426217A CN2011102650000A CN201110265000A CN102426217A CN 102426217 A CN102426217 A CN 102426217A CN 2011102650000 A CN2011102650000 A CN 2011102650000A CN 201110265000 A CN201110265000 A CN 201110265000A CN 102426217 A CN102426217 A CN 102426217A
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Abstract
The invention provides a solution for measuring the sodium silicate content in an alkali wool making solution of solar battery and its application method, which belongs to the solar energy battery production technical field. The solution is prepared by the following components by weight ratio: hydrochloric acid: water is 35-100:0-100. The invention has the advantages that the operation is simple, the solution can be removed at any time from a wool making groove for measuring the sodium silicate content, the solution is easy to produce and suitable for laboratory application, whether the sodium silicate content in the alkali wool making solution of solar battery excesses or not can be visually determined, the solution of the invention is suitable for measuring the sodium silicate content in the alkali wool making solution of monocrystalline silicon solar battery with different sizes, and is suitable for large scale production as well as for batch production. The solution of the invention can be used for measuring the sodium silicate content in the alkali wool making solution, so that the sodium silicate content in the solution can be regulated and controlled, and the failure of the alkali wool making solution can be prevented.
Description
Technical field
The invention provides a kind of solution and method of application thereof that is used to measure solar cell alkalescence Woolen-making liquid mesosilicic acid sodium content, belong to the manufacture of solar cells technical field.
Background technology
In crystal-silicon solar cell is made; (1 ~ 2wt%) sodium hydroxide solution mixes (3 ~ 8vol%) isopropyl alcohol (or ethanol), sodium silicate (1 ~ 5wt%) preparation Woolen-making liquid to utilize low concentration; Silicon chip surface to (100) crystal orientation in 70-80 ℃ of temperature range carries out anisotropic etch, just can obtain enclosing " matte " that the pyramid that forms distributes and constitutes from the teeth outwards by (111) bread.Sodium silicate is colloidal state in solution, increased the viscosity of solution greatly.To OH in the corrosive liquid
-Ion has buffer action from corrosive liquid to the transport process of reaction interface; Make that corrosion processing monocrystalline silicon suede in enormous quantities is even; Coverage rate is high, and NaOH content has the process allowance scope of broad in the solution and make, and has improved the repeatability of product processes quality of stability and solution.But in course of reaction, the reactant sodium silicate can constantly generate, and Woolen-making liquid mesosilicic acid na concn can constantly increase, and along with the increase of sodium silicate content, solution viscosity can increase, and the result can produce " gaily decorated basket seal " at silicon chip and gaily decorated basket frame contact site; Solution mesosilicic acid na concn constantly increases, and solution surface tension, interfacial energy also change thereupon, in the solution-and transfer efficiency that the OH functional group is shifted to the corrosion reaction interface reduces gradually; Anisotropy factor is also along with reduction; Bubble also becomes slowly from the release of reaction interface, though can use the isopropyl alcohol froth breaking, the corrosion rate of silicon is greatly affected; The matte coverage rate reduces greatly, causes Woolen-making liquid to lose efficacy.Regulate the content of control solution mesosilicic acid sodium, can prevent that Woolen-making liquid lost efficacy.
Summary of the invention
The present invention provides a kind of solution and method of application thereof that is used to measure solar cell alkalescence Woolen-making liquid mesosilicic acid sodium content.
When the present invention is used for the measurement of solar cell alkalescence Woolen-making liquid mesosilicic acid sodium content, in texturing slot, get a certain amount of Woolen-making liquid,,, explain that sodium silicate content is moderate if occur a small amount of floccus after titration a period of time with solution titration of the present invention; If titration begins just to occur a colloidal solid and many with becoming of titration, explain that sodium silicate is excessive.Use the method, can judge very intuitively whether solar cell alkalescence Woolen-making liquid mesosilicic acid sodium content is excessive.
For realizing above-mentioned purpose, the technical scheme that the present invention adopted is:
A kind of solution that is used to measure alkaline Woolen-making liquid mesosilicic acid sodium content, formulated by following components in part by weight: hydrochloric acid: water=35 ~ 100:0 ~ 100.Wherein, hydrochloric acid can be made by sulfuric acid and sodium chloride reaction voluntarily.Its reactive mode formula is following: H
2SO
4+ 2NaCl → 2HCl ↑+Na
2SO
4
As the further setting of such scheme, the weight ratio between said hydrochloric acid and the water is 80 ~ 100:0 ~ 10.
Said hydrochloric acid is concentrated hydrochloric acid, and massfraction is not less than 37% hydrochloric acid.
A kind of method of application that is used to measure the solution of alkaline Woolen-making liquid mesosilicic acid sodium content; Comprise the steps: in texturing slot, to get a certain amount of Woolen-making liquid; Carry out titration with any hydrochloric acid solution in above-mentioned (being a kind of solution that is used to measure alkaline Woolen-making liquid mesosilicic acid sodium content of the present invention); If occur a small amount of floccus after titration a period of time, explain that sodium silicate content is moderate; If titration begins just to occur a colloidal solid and many with becoming of titration, explain that sodium silicate is excessive.This method of application is simple, quick, only needs a cover stirring apparatus and a minim pipette, and temperature is not done specific (special) requirements, and normal temperature gets final product.
Superiority of the present invention is: 1, hydrochloric acid can be made by sulfuric acid and sodium chloride reaction voluntarily, and is simple and convenient.2, the method process operation with the method detection Woolen-making liquid mesosilicic acid sodium content is simple, and is not high to temperature requirement, can operate at normal temperatures.3, measure the amount of the sediment silicic acid that generates, just can calculate the content of Woolen-making liquid mesosilicic acid sodium.The method of testing of solar cell provided by the invention alkalescence Woolen-making liquid mesosilicic acid sodium content satisfies the purpose of laboratory and suitability for industrialized production.
Beneficial effect of the present invention is:
1) sodium silicate and hydrochloric acid reaction generate gluey floccus silicic acid, and sodium silicate and hydrochloric acid reaction chemical equation are following: Na
2SiO
3+ 2HCl → 2NaCl+ H
2SiO
3↓, the silicic acid of generation is white floccus, judges easily.
2) the present invention is with the silicic acid of salt acidometric titration generation; If concentration of hydrochloric acid is high; Then can produce deposition at the very start, and if the silicic acid that generates with the watery hydrochloric acid titration, originally solution is the unsaturated solution of silicic acid; When concentration is long-pending greater than concentration, just deposition can be produced, and deposit seed will be worked as greater than 1 * 10
4 ~ 5Shi Caineng has observed deposition and has generated, and is that hydrochloric acid with high concentration detects sodium silicate content so the present invention adopts, judges that easily the silicic acid that generates precipitates.
3) the present invention is simple to operate, whether can taking out Woolen-making liquid at any time, to measure sodium silicate content excessive, is easy to produce and the laboratory is used.
4) the present invention only needs with can be used for measuring Woolen-making liquid mesosilicic acid sodium content once cover stirring apparatus and a buret, and cost is low, is easy to control.
5) can be applicable to the test of different size monocrystalline silicon battery alkalescence Woolen-making liquid mesosilicic acid sodium content, be applicable to the production that also is applicable to short run in the large-scale production.
Test Woolen-making liquid mesosilicic acid sodium content with the present invention, can judge clearly whether Woolen-making liquid lost efficacy, the concentration that adjust it can be through discharging solution, or add ethanol or isopropyl alcohol is regulated viscosity, reaches good making herbs into wool effect.
Embodiment
Through specific embodiment the present invention is described further below, but the present invention is not limited by following examples.
Embodiment 1: in texturing slot, take out the 100ml Woolen-making liquid, carry out titration with hydrochloric acid solution, hydrochloric acid solution is that the component of concentrated hydrochloric acid: water=100:0 is formulated by weight ratio.Occur a small amount of floccus behind the about 30s of titration,, explain that titration accomplishes, to the floccus filtration and carry out the content that weighing just can calculate texturing slot mesosilicic acid sodium along with the floccus that carries out of titration does not obviously increase.
Embodiment 2: in texturing slot, take out the 100ml Woolen-making liquid, carry out titration with hydrochloric acid solution, hydrochloric acid solution is that the component of concentrated hydrochloric acid: water=35:65 is formulated by weight ratio.Occur a small amount of suspension behind the about 120s of titration, continue floccus to occur behind the titration 60s,, explain that titration accomplishes, to the floccus filtration and carry out the content that weighing just can calculate texturing slot mesosilicic acid sodium along with the floccus that carries out of titration does not obviously increase.
Embodiment 3: in texturing slot, take out the 100ml Woolen-making liquid, carry out titration with hydrochloric acid solution, hydrochloric acid solution is that the component of concentrated hydrochloric acid: water=5:95 is formulated by weight ratio.Occur muddyly behind the about 500s of titration, along with the carrying out of titration do not produce deposition, but muddiness slowly disappears, and cannot measure the amount that it generates silicic acid at all, thereby can not calculate the content of texturing slot mesosilicic acid sodium.Also prove thus, must detect sodium silicate content, could judge the silicic acid deposition that generates with the hydrochloric acid solution of high concentration.
In a word, the solution that the present invention is a kind of to be used to measure alkaline Woolen-making liquid mesosilicic acid sodium content is coordinated with speed and content of hydrochloric acid that the reaction of solar cell alkalescence Woolen-making liquid generates the silicic acid deposition mutually, the hydrochloric acid of high concentration just can detect its Woolen-making liquid mesosilicic acid sodium content.Adopt the present invention to test solar cell alkalescence Woolen-making liquid mesosilicic acid sodium content, simple to operate, easy to use, can from texturing slot, take out Woolen-making liquid at any time and detect its sodium silicate content, thereby judge whether Woolen-making liquid lost efficacy, be easy to produce and laboratory usefulness.
The foregoing description only is used to the inventive concept of the present invention of explaining, but not to the qualification of rights protection of the present invention, allly utilizes this design that the present invention is carried out the change of unsubstantiality, all should fall into protection scope of the present invention.
Claims (4)
1. a solution that is used to measure alkaline Woolen-making liquid mesosilicic acid sodium content is characterized in that by following components in part by weight formulated: hydrochloric acid: water=35 ~ 100:0 ~ 100.
2. a kind of according to claim 1 solution that is used to measure alkaline Woolen-making liquid mesosilicic acid sodium content is characterized in that: the weight ratio between said hydrochloric acid and the water is 80 ~ 100:0 ~ 10.
3. a kind of according to claim 1 or claim 2 solution that is used to measure alkaline Woolen-making liquid mesosilicic acid sodium content is characterized in that: said hydrochloric acid is concentrated hydrochloric acid.
4. a kind of according to claim 1 method of application that is used to measure the solution of alkaline Woolen-making liquid mesosilicic acid sodium content; It is characterized in that comprising the steps: in texturing slot, getting a certain amount of Woolen-making liquid; Any hydrochloric acid solution with in the claim 1 to 3 carries out titration; If occur a small amount of floccus after titration a period of time, explain that sodium silicate content is moderate; If titration begins just to occur a colloidal solid and many with becoming of titration, explain that sodium silicate is excessive.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102650000A CN102426217A (en) | 2011-09-08 | 2011-09-08 | Solution for measuring sodium silicate content in alkali wool making solution and its application method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102650000A CN102426217A (en) | 2011-09-08 | 2011-09-08 | Solution for measuring sodium silicate content in alkali wool making solution and its application method |
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|---|---|
| CN102426217A true CN102426217A (en) | 2012-04-25 |
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| CN2011102650000A Pending CN102426217A (en) | 2011-09-08 | 2011-09-08 | Solution for measuring sodium silicate content in alkali wool making solution and its application method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108831960A (en) * | 2018-06-20 | 2018-11-16 | 通威太阳能（安徽）有限公司 | A kind of novel monocrystalline silicon texturing slot and its etching method |
| CN115561390A (en) * | 2022-10-13 | 2023-01-03 | 中国航发北京航空材料研究院 | Method for detecting residual core of hollow turbine blade |
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| WO2010089812A1 (en) * | 2009-02-06 | 2010-08-12 | アーベル・システムズ株式会社 | Process for producing solar battery from waste salt and sand in desert |
| CN102154712A (en) * | 2011-03-10 | 2011-08-17 | 宁波尤利卡太阳能科技发展有限公司 | Monocrystal silicon solar battery texture etching liquid and preparation method thereof |
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2011
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010089812A1 (en) * | 2009-02-06 | 2010-08-12 | アーベル・システムズ株式会社 | Process for producing solar battery from waste salt and sand in desert |
| CN102154712A (en) * | 2011-03-10 | 2011-08-17 | 宁波尤利卡太阳能科技发展有限公司 | Monocrystal silicon solar battery texture etching liquid and preparation method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108831960A (en) * | 2018-06-20 | 2018-11-16 | 通威太阳能（安徽）有限公司 | A kind of novel monocrystalline silicon texturing slot and its etching method |
| CN115561390A (en) * | 2022-10-13 | 2023-01-03 | 中国航发北京航空材料研究院 | Method for detecting residual core of hollow turbine blade |
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Application publication date: 20120425 |