Preparation method of glass slides for xrf analysis with release aid

A technology of demoulding aids and glass flakes, which is applied to the use of wave/particle radiation for material analysis, analysis materials, instruments, etc., can solve the problems of volatilization and aggregation of poisonous substances, large amount of iodide, and high lower limit of aluminum determination, so as to reduce The effect of reducing the dosage, reducing the lower limit of analysis, and avoiding spectral line interference

Inactive Publication Date: 2021-02-19
WUHAN UNIV OF SCI & TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, there are problems in this technical field: 1, there will be volatilization and aggregation of toxic substances with bromide release agent; 2, the iodide consumption is large, and the cost is high; Spectral line interference, the lower limit of determination of aluminum is high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A method for preparing a glass sheet for XRF analysis with the function of a demoulding aid. The steps of this implementation described preparation method are:

[0029] Step 1, according to ammonium iodide: demoulding aid: the mass ratio of water is 1: (2~2.4): 5, described ammonium iodide, described demolding aid and described water are mixed, obtain containing Solutions of release aids.

[0030] Step 2: Mix 67wt% lithium tetraborate and 33wt% lithium metaborate to obtain a mixed flux; mix 6.0000-6.8000g of the mixed flux with 0.7000-1.0000g oxide powder to obtain a mixture.

[0031] Step 3, placing the mixture in a platinum crucible, adding 2 to 3 drops of the solution containing the demoulding aid to the mixture; then placing the platinum crucible containing the mixture in a high-temperature furnace, and Melt at 980-1010°C for 15-19 minutes; take out the platinum crucible containing the molten mixture, let it cool naturally, peel it off, and demould it to obtain a ...

Embodiment 2

[0034] A method for preparing a glass sheet for XRF analysis with the function of a demoulding aid. The steps of this implementation described preparation method are:

[0035] Step 1, according to the mass ratio of ammonium iodide: demoulding aid: water is 1: (2.3~2.7): 5, described ammonium iodide, described demoulding aid and described water are mixed, obtain containing Solutions of release aids.

[0036] Step 2: Mix 67wt% lithium tetraborate and 33wt% lithium metaborate to obtain a mixed flux; mix 6.6000-7.4000g of the mixed flux with 0.4000-0.7000g oxide powder to obtain a mixture.

[0037] Step 3, placing the mixture in a platinum crucible, adding 3 to 4 drops of the solution containing the demoulding aid to the mixture; then placing the platinum crucible containing the mixture in a high-temperature furnace, and Melt at 1000-1030°C for 18-22 minutes; take out the platinum crucible containing the molten mixture, cool naturally, peel off, and demould to obtain a glass pie...

Embodiment 3

[0040] A method for preparing a glass sheet for XRF analysis with the function of a demoulding aid. The steps of this implementation described preparation method are:

[0041] Step 1, according to the mass ratio of ammonium iodide: demoulding aid: water is 1: (2.6~3): 5, described ammonium iodide, described demoulding aid and described water are mixed, obtain containing Solutions of release aids.

[0042] Step 2: Mix 67wt% lithium tetraborate and 33wt% lithium metaborate to obtain a mixed flux; mix 7.2000-8.0000g of the mixed flux with 0.1000-0.4000g oxide powder to obtain a mixture.

[0043] Step 3, placing the mixture in a platinum crucible, adding 4 to 5 drops of the solution containing the demoulding aid to the mixture; then placing the platinum crucible containing the mixture in a high-temperature furnace, Melt at 1020-1050°C for 21-25 minutes; take out the platinum crucible containing the molten mixture, cool naturally, peel off, and demould to obtain a glass piece for...

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PUM

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Abstract

The invention relates to a preparation method for an XRF analysis glass sheet with a demolding assistant function. The preparation method is characterized by comprising the following steps: blending according to a mass ratio of ammonium iodide to a demolding assistant to water of 1:(2-3):5, and uniformly mixing, to obtain solution containing the demolding assistant; mixing 67wt% of lithium tetraborate and 33wt% of lithium metaborate, to obtain a mixed fluxing agent; uniformly mixing 6.000-8.000 g of the mixed fluxing agent and 0.1000-1.0000 g of oxide powder, to obtain a mixture; placing the mixture in a platinum crucible, dropwise adding 2-5 drops of the solution containing the demolding assistant to the mixture; placing the platinum crucible filled with the mixture in a high-temperaturefurnace, melting for 15-25 min in a condition of 980-1050 DEG C; and taking out the platinum crucible filled with the molten mixture, naturally cooling, stripping, and demolding, to obtain the XRF analysis glass sheet with the demolding assistant function. The preparation method is low in production cost and good in preparation environment, and the prepared XRF analysis glass sheet is capable of reducing an analysis lower limit of Al.

Description

technical field [0001] The invention belongs to the technical field of preparation of glass flakes for XRF analysis. Specifically relates to a method for preparing a glass sheet for XRF analysis with the function of a demoulding aid. Background technique [0002] During the melting preparation process of glass flake samples for XRF analysis, due to the tendency of the melt to adhere to or infiltrate the platinum crucible or mold, the glass flakes adhere to the crucible or mold and are not easy to separate, thus affecting the quality of the glass flakes for XRF analysis. Uniformity. Therefore, a mold release agent must be used to help the glass slide for XRF analysis be released from the crucible or mold. Currently, the only release agents are iodide and bromide. The release mechanism is that the halide forms a layer of halide membrane on the surface of the melt to block the infiltration of the melt to the platinum crucible. Because the diaphragm layer is very thin, the a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N23/223G01N23/2202
CPCG01N23/2202G01N23/223
Inventor 徐建平李新家李光辉
Owner WUHAN UNIV OF SCI & TECH
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