Unlock instant, AI-driven research and patent intelligence for your innovation.

A method for determining impurity elements in boron carbide alumina pellets

A kind of technology of impurity element and determination method, applied in the field of chemical detection of boron carbide alumina pellets

Active Publication Date: 2018-05-18
CHINA NUCLEAR BAOTOU GUANGHUA CHEM IND
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are no public reports on the dissolution method of boron carbide alumina pellets and the determination of impurities.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A method for determining impurity elements in boron carbide alumina pellets
  • A method for determining impurity elements in boron carbide alumina pellets
  • A method for determining impurity elements in boron carbide alumina pellets

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] A method for measuring impurity elements in boron carbide alumina pellets according to the present invention comprises the following steps (wherein said impurity elements include Fe, Si, Ca, Cr, Ni, Mg, Eu, Gd, Dy, Hf, Sm, Na):

[0038] (1) Sample dissolution

[0039] Accurately weigh 0.1g of the sample and place it in a 100mL polyethylene inner tank (Mmicrowave 3000, manufactured by Anton Paar), add 5mL of phosphoric acid, and digest in a microwave oven. The digestion procedure is: Digest at 220°C and 800W for 50min;

[0040] After cooling to room temperature, add 10mL, 5.5mol / L nitric acid solution and 2mL hydrofluoric acid into the polyethylene inner tube, and then repeat the digestion in a microwave oven. The digestion procedure is: Digest at 220°C, 800W for 50min;

[0041] After cooling to room temperature, transfer the sample into a 100mL volumetric flask with deionized water, set the volume to the mark, and shake well to obtain a sample solution.

[0042] Descr...

Embodiment 2

[0070] Weigh 18 parts of the same boron tricarbide aluminum oxide sample respectively, and divide them into three groups, one group is used as the background; one group is added with the amount of the lower limit of each impurity element; The sample was measured under the same processing conditions described in Example 1, and the results are shown in Tables 6 and 7.

[0071] Table 6 The recovery rate and precision of the lower limit point of the method for impurity elements μg / g

[0072]

[0073] Table 7 Recovery and precision of five times lower limit point of impurity element method μg / g

[0074]

[0075]

[0076] The results show that the recovery rate of each impurity element to be tested is 95%-102%, and the precision is better than 10%.

[0077] According to the difference in chemical properties between boron carbide and aluminum oxide, the present invention adopts a step-by-step dissolution method to dissolve samples. According to the chemical properties of b...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention provides a method for determination of impurity elements in a boron carbide alumina core block, wherein the method comprises the following steps: (1) sample dissolution; (2) extraction and separation; (3) blank solution preparation; (4) measurement with plasma emission spectroscopy; and (5) result calculation. With the method for determination of the impurity elements in the boron carbide alumina core block, according to the needs of detection work, based on conventional laboratory instruments and equipment, the detection method for determination of the content of 12 impurity elements in the boron carbide alumina core block by the plasma emission spectroscopy is established, and scientific research and production detection needs are met. With use of the method, the content of all the impurity elements in the boron carbide alumina core block can be accurately determined, and accurate detection data are obtained and effectively cooperate with implement of scientific researches and production.

Description

technical field [0001] The invention relates to a chemical detection method for boron carbide alumina pellets, in particular to a method for measuring the contents of 12 impurity elements in boron carbide alumina pellets by using plasma emission spectrometry. Background technique [0002] The boron carbide alumina pellet is an important part of the domestic AP1000 component water-passing annular burnable poison rod, mainly composed of B 4 C powder and Al 2 o 3 The powder is sintered at high temperature after a certain proportion. The hardness of boron carbide is second only to diamond, and it is insoluble in acid and alkali. Alumina, commonly known as corundum, is relatively hard, insoluble in water, and slightly soluble in alkali and acid. Therefore, the chemical properties of boron carbide alumina after high-temperature calcination are more stable, and it is more difficult to dissolve in acid and alkali. At present, there are no public reports on the dissolution method...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/71G01N1/44
CPCG01N1/44G01N21/71
Inventor 王梅赵竹霞马妍琳
Owner CHINA NUCLEAR BAOTOU GUANGHUA CHEM IND