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Method for measuring oxygen content in lanthanum, cerium metal or lanthanum-cerium alloy

A lanthanum-cerium alloy and a determination method technology, applied in the field of metal material gas analysis, can solve problems such as pollution interference, and achieve the effects of easy control, high test accuracy, and inhibition of volatilization pollution

Active Publication Date: 2021-11-02
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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Problems solved by technology

[0007] The purpose of the present invention is to provide a method for measuring the oxygen content in lanthanum, cerium metal or lanthanum-cerium alloy. The pulse melting-infrared absorption method is used to measure the content of impurity oxygen in lanthanum, cerium metal or lanthanum-cerium alloy, which can solve the problem of rare earth metal lanthanum. , cerium or lanthanum cerium alloy in the analysis process due to pollution caused by volatilization interference

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  • Method for measuring oxygen content in lanthanum, cerium metal or lanthanum-cerium alloy
  • Method for measuring oxygen content in lanthanum, cerium metal or lanthanum-cerium alloy

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Embodiment Construction

[0027] In the specific implementation process, the present invention adopts ON3000 pulsed infrared thermal conductivity oxygen and nitrogen analyzer (produced by Gangyan Nanke Detection Technology Co., Ltd.), and its main working parameters are as follows: carrier gas flow rate 400mL / min, degassing power 4600W, degassing power The gas time is 30s, the analysis power is 4200W, and the analysis time is 45s.

[0028] Oxygen standard sample in steel: GBW(E)020140(w(O)=0.014wt%); GBW(E)020143(w(O)=0.0075wt%); GBW(E)020137(w(O)=0.0034 wt%).

[0029] In this example, the standard curve method was used for quantitative analysis, which belongs to multi-point calibration. The abscissa of the standard curve represents variables that can be precisely measured, and the ordinate represents the response value of the instrument. Use three commercially available oxygen standard samples in steel to establish a standard working curve: weigh three standard samples each, and draw a standard curv...

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Abstract

The invention relates to a method for measuring oxygen content in lanthanum, cerium metal or lanthanum-cerium alloy, and belongs to the field of metal material gas analysis. The measuring method adopts a pulse melting-infrared absorption method to measure the content of impurity oxygen in lanthanum, cerium metal or lanthanum-cerium alloy, and comprises the following steps: treating the surface of a sample, debugging working parameters of a pulse infrared thermal conductivity oxygen and nitrogen analyzer, establishing a standard working curve, measuring the sample, and correcting volatile pollution in real time. According to the method, 0.10 to 0.20 g of sample weighing amount and 4200 W of analysis power are selected, a Cu-Sn-Fe-Ni quaternary bath with the weight ratio of 3: 3: 1: 1 is prepared, a sample and standard sample interval feeding correction method is combined, the method for testing oxygen in the rare earth metal lanthanum-cerium alloy is established, and the problem of pollution interference caused by volatilization in the analysis process of rare earth metal lanthanum, cerium or lanthanum-cerium alloy can be solved.

Description

technical field [0001] The invention relates to a method for measuring oxygen content in lanthanum, cerium metal or lanthanum-cerium alloy, which belongs to the field of metal material gas analysis. Background technique [0002] Rare earth is the unique advantage resource of our country. Rare earths are widely used in metallurgy, military, petrochemical, glass ceramics, agriculture and high-end manufacturing of new materials. Since rare earths are indispensable in many industrial fields, they are called "industrial vitamins". Rare earth elements play a very important role in steel. Adding rare earth metals lanthanum and cerium into the molten steel can purify the molten steel and greatly improve the mechanical and corrosion resistance properties of the steel. [0003] The chemical properties of rare earth metals lanthanum and cerium are very active, and they are easily combined with oxygen in the air, forming a layer of dark and loose oxide on the surface. The high conten...

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Application Information

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IPC IPC(8): G01N21/3504G01N21/27G01N1/28G01N1/34G01N1/44
CPCG01N21/3504G01N21/276G01N1/28G01N1/286G01N1/34G01N1/44G01N2001/2866
Inventor 张琳朱瑛才刘航
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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