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Analytical method for measuring contents of iron, manganese, aluminum, titanium, nickel, calcium and magnesium in silica powder

A technology of magnesium and silicon powder, used in the analysis of titanium, nickel, magnesium, aluminum, calcium, determination of iron and manganese in silicon powder, can solve the technical conditions and safety requirements for increasing magnesium detection and not suitable for scientific research and production And other issues

Inactive Publication Date: 2014-12-24
AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] The present invention is designed to provide an analytical method for measuring iron, manganese, aluminum, titanium, nickel, calcium, and magnesium elements in silicon powder just for the situation in the above-mentioned prior art. The technical conditions and safety requirements of production, and the detection of magnesium element are added at the same time, which solves the difficult problems raised by customers and provides a technical basis for the revision of GB / T14849.4‐2008 testing standards

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  • Analytical method for measuring contents of iron, manganese, aluminum, titanium, nickel, calcium and magnesium in silica powder
  • Analytical method for measuring contents of iron, manganese, aluminum, titanium, nickel, calcium and magnesium in silica powder
  • Analytical method for measuring contents of iron, manganese, aluminum, titanium, nickel, calcium and magnesium in silica powder

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Embodiment 1

[0066] To measure the content of iron, manganese, aluminum, titanium, nickel, calcium and magnesium in silicon powder, an inductively coupled plasma emission spectrometer (French JY170) is used. The working conditions and analysis lines of the instrument are as follows: high frequency frequency: 40.68MHz ;Incidental power: 0.95Kw; Reflected power: <15W; Cooling air flow: 15L / min; Sheath air flow: 0.2L / min; Mn: 257.610nm; Al: 396.152nm; Ti: 334.941nm; Ni: 231.604nm; Ca: 315.887nm; Mg: 285.213nm.

[0067] The reagents used in the assay process are as follows:

[0068] Hydrochloric acid, ρ1.19g / mL; superior grade;

[0069] Hydrochloric acid, 1+1;

[0070] Hydrofluoric acid, ρ1.14g / mL; superior grade;

[0071] Nitric acid, ρ1.42g / mL; superior grade;

[0072] Nitric acid, 1+1;

[0073] Sulfuric acid, ρ1.84g / mL; superior grade;

[0074] Sulfuric acid, 1+1;

[0075] Iron standard solution A: the mass-volume concentration is 1.00mg / mL, the preparation method is to weigh 0.5000g...

Embodiment 2

[0107] To measure the content of iron, manganese, aluminum, titanium, nickel, calcium and magnesium in silicon powder, an inductively coupled plasma emission spectrometer (French JY170) is used. The working conditions and analysis lines of the instrument are as follows: high frequency frequency: 40.68MHz ; Incident power: 1.0Kw; Reflected power: <15W; Cooling air flow: 18L / min; Sheath air flow: 0.4L / min; Sample lift: 1.2mL / min; Integration time: 8s; Elemental analysis line: Fe Mn: 257.610nm; Al: 396.152nm; Ti: 334.941nm; Ni: 231.604nm; Ca: 315.887nm; Mg: 279.553nm.

[0108] The reagents used in the assay process are as follows:

[0109] Hydrochloric acid, ρ1.19g / mL; superior grade;

[0110] Hydrochloric acid, 1+1;

[0111] Hydrofluoric acid, ρ1.14g / mL; superior grade;

[0112] Nitric acid, ρ1.42g / mL; superior grade;

[0113] Nitric acid, 1+1;

[0114] Sulfuric acid, ρ1.84g / mL; superior grade;

[0115] Sulfuric acid, 1+1;

[0116] Iron standard solution A: the mass-volum...

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Abstract

The invention discloses an analytical method for measuring contents of iron, manganese, aluminum, titanium, nickel, calcium and magnesium in silica powder. According to the method, the weighing amount is reduced to 0.1g, complete dissolution is easily realized in the sample dissolving process, the sample dissolving time is greatly shortened, and the working efficiency is improved on the premise that the accuracy of the detection result is not influenced. According to the method, fuming perchloric acid is replaced by fuming sulfuric acid to remove silicon and fluorine, so that not only can the data accuracy be guaranteed, but also the operating safety of the method is improved. According to the method, the measurement range of all to-be-measured elements is enlarged to be 0.005-3 percent. All accurate data can be completely provided during measurement, not only can smooth production and delivery of customers be guaranteed, but also the scientific research needs of customers are met.

Description

technical field [0001] The invention is an analysis method for determining iron, manganese, aluminum, titanium, nickel, calcium and magnesium elements in silicon powder, which belongs to the impurity element analysis technology of silicon powder. Background technique [0002] At present, the domestic detection method for the analysis of impurities in silicon powder is GB / T14849.4-2008. The sample weight of this method is 0.25g, which is large. In the actual operation process, if the sample is weighed according to this standard, the dissolved The sample is difficult, and the sample is often incompletely dissolved, which affects the accuracy of the measurement result. [0003] GB / T14849.4-2008 uses perchloric acid to smoke to remove silicon, fluorine, etc. When perchloric acid fume is emitted, if the organic matter is not completely digested, or the organic matter floating in the air falls into the platinum dish that is emitting perchloric acid fume during the experiment, it ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/71
Inventor 任慧叶晓英杨春晟
Owner AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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