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A kind of determination method of ferrous iron and ferric iron content in glass

A determination method, technology of ferric iron, applied in the direction of color/spectral characteristic measurement, etc., can solve problems such as delays, countermeasures, difficulty in mastering, affecting production quality, etc.

Active Publication Date: 2021-09-10
SICHUAN HONGKE INNOVATION TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In practice, preventing Fe 2+ oxidized to Fe 3+ The operation method is difficult to master, and the accuracy and repeatability of the measured data are poor
Using this method to feed back production information takes a long period, generally not less than 8 hours, and cannot timely and accurately feed back the Fe content in the glass. 2+ with Fe 3+ The change of the content ratio, the production process cannot be adjusted in time, delays the timing of the problem countermeasures, and seriously affects the production quality

Method used

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  • A kind of determination method of ferrous iron and ferric iron content in glass
  • A kind of determination method of ferrous iron and ferric iron content in glass
  • A kind of determination method of ferrous iron and ferric iron content in glass

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0166] Standard solution (standard sample): prepare 1000ppm ferrous iron single standard solution with ferrous ammonium sulfate hexahydrate, prepare 1000ppm ferric iron single standard solution with dodecahydrate ferric ammonium sulfate, prepare the ferric iron shown in Table 1 A series of standard samples proportional to the total iron content, the pH of the standard sample is 0.01, and the total iron content of the standard sample is Fe (aq) It is 150ppm, or 0.015%. Standard sample thickness d (aq) That is, the size of the cuvette is 1cm, and the data records of the standard samples are detailed in Table 1 below.

[0167] Glass sample: glass with a thickness of 2.005mm, the total iron content Fe was measured by X-ray fluorescence spectrometry (XRF) (s) It is 97ppm, or 0.0097%. Measure the maximum absorption peak area A of the glass in the wavelength range of 190nm to 400nm on a spectrophotometer (s)Fe 3+ is 62.526.

[0168] Table 1

[0169]

[0170] In the present ...

Embodiment 2

[0209] Standard sample: prepare 1000ppm ferrous iron single standard solution with ferrous ammonium sulfate hexahydrate, prepare 1000ppm ferric iron single standard solution with dodecahydrate ferrous ammonium sulfate, and prepare the series of standard samples shown in Table 2. pH=0.01, total iron Fe (aq) The content is 150ppm, that is, 0.015%, and the maximum absorption peak area corresponding to the total iron in the standard sample is recorded as A (aq) , the maximum absorption peak area A of each standard ferric iron in the wavelength range of 190nm to 400nm was measured on a spectrophotometer 3 , standard sample thickness d (aq) That is, the size of the cuvette is 1cm, and the data records of the standard samples are detailed in Table 2 below.

[0210] Glass sample: cover glass with a thickness of 0.821mm, the total iron content Fe was measured on XRF (s) It is 95ppm, or 0.0095%. Measure the maximum absorption peak area A of the glass in the wavelength range of 190nm...

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Abstract

Fe in glass is disclosed 2+ and Fe 3+ Content determination method, first measure the total iron content of the glass, and prepare a series of known Fe 2+ and Fe 3+ The standard solution with the highest content ratio and the Fe content is equal or similar to the glass Fe content, and the standard solution A is measured 3 , assuming glass K (s) with standard solution K (aq) Same, get an A (s)Fe 3+ with A (s) The regression equation, calculate A (s) , Fe in glass 3+ The theoretical ratio of content to Fe content k t =A (s)Fe 3+ / A (s) , assuming glass K (s) K with standard solution (aq) same, get k t with A (s)Fe 3+ / A (s) The regression equation of the ratio, get k t , according to K (aq) / K (s) / Ratio is the conversion value ε of the absorption coefficient of glass and standard solution, and the ε of the series of standard solutions is obtained, and A is found 3 with A (s)Fe 3+ The standard solution with the closest value, the conversion value of the absorption coefficient corresponding to the standard solution is ε M , to get Fe in the glass 3+ The actual ratio to Fe content k=k t / ε M , get Fe 2+ and Fe 3+ content.

Description

technical field [0001] The invention relates to the technical field of methods for detecting iron content in glass, in particular to a method for measuring the contents of ferrous iron and ferric iron in glass. Background technique [0002] In glass manufacturing, except for colored glass, iron is an impurity in the glass composition, and the iron content must be strictly controlled. Iron in glass is Fe 2+ and Fe 3+ There are two valence states, the ratio of the two is closely related to the melting and forming, and the change of the oxidation-reduction atmosphere in the furnace directly determines the change of the ratio of the two; the change of the ratio of the two also affects the quality of glass melting. Because, the Fe in the glass 2+ Can strongly absorb infrared rays, Fe 3+ It can strongly absorb ultraviolet rays, therefore, the change of the ratio of the two will directly affect the change of the amount of heat absorbed by the molten glass, resulting in changes ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/31
CPCG01N21/31
Inventor 李青李赫然宫汝华田普强张晓燕胡正宜陈芳芳
Owner SICHUAN HONGKE INNOVATION TECH CO LTD