Detection method for measuring silver content of silver paste for solar battery

Abstract

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 ...

AI Technical Summary

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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