Test method for determination of silver content in silver paste for solar cells
A technology for solar cells and detection methods, applied in the field of detection, can solve problems such as inability to accurately calculate the silver content of silver paste for solar cells, and achieve the effect of promoting quality improvement and stability, and standardizing the market
Active Publication Date: 2015-07-29
WUXI INSPECTION TESTING & CERTIFICATION INST
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Problems solved by technology
Due to the different types and contents of components such as conductive phase silver powder, inorganic binder glass frit, organic vehicle (including organic solvent and organic resin) and trace additives to improve battery performance that make up the silver electronic paste for solar cells, we After testing, according to the steps of the method for measuring the silver element content in the conductive silver paste material invented by the patent No. 201110233626, after baking for 1 hour at 350°C, the organic components of the silver paste for solar cells were not completely destroyed. The silver content of the silver paste for solar cells cannot be accurately calculated
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Embodiment 1
[0026] Example 1 Digested with Nitric Acid and Titration Analysis to Determinate the Detection Method of Silver Paste Silver Content for Solar Cells
[0027] 1. Instruments, samples and reagents
[0028] 1.1 Sample
[0029] 2 batches of silver paste for solar cells from different sources: both were collected by Wuxi Product Quality Supervision and Inspection Center;
[0030] 1.2 Reagents
[0031] Nitric acid: superior grade (Sinopharm Group Chemical Reagent Co., Ltd.); ferric ammonium sulfate dodecahydrate: analytically pure (Sinopharm Group Chemical Reagent Co., Ltd.); ammonium thiocyanate: analytically pure (Sinopharm Group Chemical Reagent Co., Ltd.); Sodium (National Secondary Standard Material, GBW(E) 060024, National Standard Material Research Center, Beijing, China); 100g / L ferric ammonium sulfate solution: 10g ferric ammonium sulfate dodecahydrate dissolved in 90ML (1+10) nitric acid solution; 0.1mol / L ammonium thiocyanate standard solution: prepared and calibrated ...
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The invention relates to a detection method for measuring silver content of silver paste for a solar battery. The detection method comprises the following steps of: firstly, weighing a right amount of a silver paste sample for the solar battery, adding nitric acid, and slowly heating to nitrify the solution through an electric hot plate until the solution is basically clear; then, adding a certain amount of nitric acid into a test solution subjected to primary nitration by nitric acid, sequentially heating to 150 DEG C by the electric hot plate for secondary nitration until the solution is completely clear, and finally taking ammonium ferric sulfate as an indicating agent, using a thiocyanate standard solution to titrate a test solution, and meanwhile, carrying out a blank test; and calculating the silver content of the sample according to test data and a formula. The result proves that the relative standard deviation (n=11) of the silver sample, measured according to the invention, is less than 1%, and the method is accurate and reliable. The detection method provided by the invention has the advantages that the operation is simple, the detection method is economical and practical, the measuring speed is rapid, the efficiency is high, the measuring result is accurate, and the applicability is good.
Description
technical field [0001] The invention relates to a detection method for determining the silver content of silver paste for solar cells, specifically a method for rapidly and quantitatively determining the silver content in silver paste for solar cells by titrating a sample with nitric acid for a second time and titrating it with a thiocyanate standard solution The analysis method belongs to the technical field of detection. Background technique [0002] Fossil energy (coal, oil, natural gas) is the main body of the current global energy consumption structure. With the continuous exploitation of human beings, the depletion of fossil energy is inevitable. In addition, the use of fossil energy will produce a large amount of greenhouse gas CO 2 , leading to global warming, melting of polar glaciers, rising sea levels and other increasingly serious environmental problems. Therefore, the development of non-polluting renewable energy such as solar energy, wind energy, geothermal ...
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IPC IPC(8): G01N31/16G01N1/44
Inventor 姚凤花何莉汪晓华徐敏秀恽旻
Owner WUXI INSPECTION TESTING & CERTIFICATION INST