Method for directly determining aluminum content in aluminum-niobium alloy

A niobium alloy and aluminum content technology, which is applied in the field of chemical analysis and detection of cemented carbide, can solve the problems affecting the production efficiency and profit of enterprises, and achieve the effect of reliable quality reference, reducing loss and improving detection accuracy

Inactive Publication Date: 2015-12-30
SHANGLUO TIANYE HIGH NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This seriously affects the production efficiency and profit of the enterprise.

Method used

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  • Method for directly determining aluminum content in aluminum-niobium alloy
  • Method for directly determining aluminum content in aluminum-niobium alloy
  • Method for directly determining aluminum content in aluminum-niobium alloy

Examples

Experimental program
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Embodiment 1

[0046] A method for directly measuring aluminum content in an aluminum-niobium alloy, the method steps are as follows:

[0047] (1) Crushing the aluminum-niobium alloy to be measured, passing through a 200-mesh stainless steel standard sieve after crushing, and then using the heap-cone quartering method to shrink and select samples to obtain a powdered aluminum-niobium alloy sample with a particle size ≥ 200 mesh; accurately weigh Add 0.1000g of a powdered aluminum-niobium alloy sample with a particle size ≥ 200 mesh into the volumetric flask, measure 10mL of sulfuric acid solution and 10mL of nitric acid solution with a measuring cylinder, mix them in the volumetric flask, put them on an electric furnace, heat and boil until the sample is dissolved Completely, take out the volumetric flask and cool it down to room temperature naturally to obtain the solution to be tested;

[0048] The sulfuric acid solution is a solution mixed with analytically pure sulfuric acid and distille...

Embodiment 2

[0075] A method for directly measuring aluminum content in an aluminum-niobium alloy, the method steps are as follows:

[0076] (1) Crushing the aluminum-niobium alloy with a measurement, passing through a 200-mesh stainless steel standard sieve after crushing, and then using the heap-cone quartering method to shrink and select samples to obtain a powdered aluminum-niobium alloy sample with a particle size ≥ 200 mesh; accurately weigh Measure 0.2000g of powdered aluminum-niobium alloy sample with particle size ≥ 200 mesh into the volumetric flask, measure 20mL of sulfuric acid solution and 20mL of nitric acid solution into the volumetric flask with a measuring cylinder, mix them, put them on an electric furnace, heat and boil until the sample Dissolve completely, take out the volumetric flask and cool it down to room temperature naturally to obtain the solution to be tested;

[0077] The sulfuric acid solution is a solution mixed with analytically pure sulfuric acid and distil...

Embodiment 3

[0103] A method for directly measuring aluminum content in an aluminum-niobium alloy, the method steps are as follows:

[0104](1) Crushing the aluminum-niobium alloy with a measurement, passing through a 200-mesh stainless steel standard sieve after crushing, and then using the heap-cone quartering method to shrink and select samples to obtain a powdered aluminum-niobium alloy sample with a particle size ≥ 200 mesh; accurately weigh Measure 0.3000g of powdered aluminum-niobium alloy sample with particle size ≥200 mesh into the volumetric flask, measure 20mL of sulfuric acid solution and 20mL of nitric acid solution with a measuring cylinder, mix them in the volumetric flask, heat and boil on the electric furnace until the sample Dissolve completely, take out the volumetric flask and cool it down to room temperature naturally to obtain the solution to be tested;

[0105] The sulfuric acid solution is a solution mixed with analytically pure sulfuric acid and distilled water at ...

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Abstract

The invention relates to a method for directly determining aluminum content in aluminum-niobium alloy, and belongs to the technical field of chemical analysis and detection of hard alloy. The method comprises the following steps: dissolving a powdered aluminum-niobium alloy test sample in a sulfuric acid and nitric acid solution, adding an EDTA solution and distilled water to reduce the acidity of the solution, complexing aluminum ions and hydrolyzing niobium ions to facilitate the complete precipitation, obtaining a test solution of an Al-EDTA complex containing the niobium hydroxide precipitates, sufficiently releasing the aluminum ions, wherein the niobium hydroxide precipitates are too tiny to absorb the aluminum ions, so that the loss of the aluminum ions is reduced; and determining the aluminum ions in the mixed solution in a titration method, wherein xylenol orange in the titration method is used as an indication agent, NaF is used as a replacement agent, ZnCl2 is a standard solution for the titration, and titrating the replaced EDTA with the quantity equal to that of the aluminum. According to the method, the determination of the aluminum in the aluminum-niobium alloy is changed from an indirect difference method to a direct determination method, so that the detection accuracy is greatly improved, and a feasible method is provided for detecting the aluminum content in the niobium-aluminum alloy.

Description

technical field [0001] The invention relates to a method for directly measuring the aluminum content in an aluminum-niobium alloy, belonging to the technical field of chemical analysis and detection of hard alloys. Background technique [0002] Aluminum-niobium alloy has the characteristics of high melting point and low density, and is widely used as an additive for superconducting alloy materials and alloy materials for biomedical devices and in the aerospace industry. Since the ratio of niobium and aluminum in the matrix varies greatly according to the requirements of specific aluminum-niobium alloy products, the influence of the composition of the matrix on the test cannot be ignored. The composition and content of aluminum are very important in the smelting and use of aluminum-niobium alloys. At present, for the determination of niobium content in aluminum-niobium alloys, most enterprises adopt the relatively mature tannic acid hydrolysis gravimetric method, which takes ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N31/16
Inventor 郭金亮李志德
Owner SHANGLUO TIANYE HIGH NEW MATERIAL CO LTD
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