Quick detecting method of mass content of trace iron in photovoltaic glass

Abstract

The invention discloses a quick detecting method of mass content of trace iron in photovoltaic glass. The method comprises the following steps: taking a photovoltaic glass original film, testing stable absorption of the photovoltaic glass original film within a 700-1100nm region, calculating absorbancy difference at 1050nm and 770nm sites, and the calculating the mass content of ferrous according to the linear relation of the mass content of ferrous and the absorbancy difference; testing the transmittance curve of the photovoltaic glass original film within a 350-1050nm region, recording the transmittance at 1000nm and 380nm sites, and calculating the mass content of ferric iron according to a ratio formula of the ferrous and ferric iron; and calculating the sum of the mass contents of the ferrous and ferric iron to obtain the total mass content of iron in the photovoltaic glass. The relative error of the total mass content of iron in the testing result of the method provided by the invention and the testing results of other methods is smaller than 1%, and the method is simple, quick and accurate to operate.

Description

technical field [0001] The invention relates to the field of detection methods for iron content in glass, in particular to a rapid detection method for trace iron content in photovoltaic glass. technical background [0002] Photovoltaic glass, also known as ultra-clear high-transparency low-iron glass, is an essential material for solar cell packaging. Iron is an impurity in photovoltaic glass, which directly affects the optical properties of the glass. The presence of impurity iron makes the glass colored, increases the absorption of sunlight, and reduces the light transmittance of the glass; among them, ferrous iron can strongly absorb infrared rays, and ferric iron can strongly absorb ultraviolet rays. The low impurity iron content brings high sunlight transmittance, which indirectly improves the photoelectric conversion efficiency of the battery. [0003] In order to better control the light transmittance of photovoltaic glass, it is necessary to measure the content of...

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Problems solved by technology

The process is complicated, the workload is heavy, and the sample dissolution conditions need to be strictly controlled, and in most cases the measured data is the total iron content; if the ferrous iron content needs to be tested, the sample dissolution must be carried out in a closed and opaque environment , to keep the ferrous iron in the glass from being oxidized by the oxygen in the air, the actual operation is more difficult

In addition, some modern instrumental analysis methods, such as Mössbauer spectroscopy, X-ray fluorescence spectroscopy, etc., are difficult to popularize due to expensive equipment and high requirements for laboratory conditions

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