Method for preparing synchrotron-radiation X-ray absorption fine-structure test sample of hydrogen storage material

A technology for absorbing fine structures and hydrogen storage materials, applied in the preparation of test samples, material analysis using radiation diffraction, etc., can solve problems such as easy oxidation, and achieve the effects of avoiding oil leakage, advanced preparation technology, and simple methods

Active Publication Date: 2016-06-08
YANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most hydrogen storage materials have relatively strong reactivity, especially hydrogen storage materials that have undergone repeated hydrogen absorption and desorption, are very prone to oxidation, and synchrotron radiation X-ray diffraction devices generally work in an atmospheric environment, and there are only a few in a country. unit will have such a large device

Method used

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  • Method for preparing synchrotron-radiation X-ray absorption fine-structure test sample of hydrogen storage material
  • Method for preparing synchrotron-radiation X-ray absorption fine-structure test sample of hydrogen storage material
  • Method for preparing synchrotron-radiation X-ray absorption fine-structure test sample of hydrogen storage material

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Experimental program
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Embodiment 1

[0034] Regulate the argon atmosphere glove box so that the argon pressure in the argon atmosphere glove box is kept at 0.8mbar, and the partial pressures of water and oxygen are both lower than 0.1ppm. In the argon atmosphere glove box, weigh 30mg of LaNi with an electronic balance 5 For the alloy sample, weigh 90mg of LiF powder and pour it into an agate mortar, grind and mix well until the particle size of the sample powder is between 30-38um, and the particle size of the powder is confirmed by SEM. In an argon atmosphere glove box, weigh 40 mg of the ground powder sample with an electronic balance and put it into an HF-12 tableting mold, shake the mold, and then tap the glove box table to ensure that the powder in the mold is basically evenly distributed, and then insert Put up the pressing rod, slowly rotate the pressing rod to spread the sample powder evenly in the mold, put the HF-12 tableting mold on the HY-12 tableting machine, and make the center of the pressing rod al...

Embodiment 2

[0038] Regulate the nitrogen atmosphere glove box so that the argon pressure in the nitrogen atmosphere glove box is kept at 1mbar, and the partial pressures of water and oxygen are both lower than 0.1ppm. In the nitrogen atmosphere glove box, weigh 33mg of LaNi with an electronic balance 4.25 Al 0.75 For the alloy sample, weigh 90mg of BN powder and pour it into an agate mortar, grind and mix well until the particle size of the sample powder is between 30-38um, and the particle size of the powder is confirmed by SEM. In the process, 41 mg of the ground powder sample was weighed by an electronic balance and put into the HF-12 tableting mold, the mold was shaken, and then the table of the glove box was tapped to ensure that the powder in the mold was basically evenly distributed, and then the pressing rod was inserted, slowly Slowly rotate the pressure rod to spread the sample powder evenly in the mold, put the HF-12 tablet mold on the HY-12 tablet press, make the center of the...

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Abstract

The invention discloses a method for preparing a synchrotron-radiation X-ray absorption fine-structure test sample of a hydrogen storage material, and relates to the technical field of hydrogen storage materials. In the atmosphere of argon or nitrogen gas, one of LiF or BN and a to-be-tested sample are mixed and ground, and mixed powder with particle diameter ranging from 30 micrometers to 50 micrometers is obtained; a pressed sample piece is packaged in a double-mirror-surface stainless steel plate with the thickness of the stainless steel plate larger than that of the pressed sample piece, and with a through hole larger than the pressed sample piece; the pressed sample piece sealed in the double-mirror-surface stainless steel plate is then preserved in a metal container filled with argon or nitrogen gas. The method guarantees that the sample is located in the sealed argon or nitrogen gas atmosphere, and can be preserved for a long time without oxidation; moreover, the rigid stainless steel metal plate on the periphery has a good protection effect on the pressed sample piece, and the pressed sample piece cannot crack or break due to unexpected reasons, so that long-distance delivery and carrying are facilitated.

Description

technical field [0001] The invention relates to the technical field of hydrogen storage materials, in particular to the preparation of synchrotron radiation X-ray absorption fine structure test samples. Background technique [0002] At present, the search for new hydrogen storage materials has attracted extensive attention from the scientific community. Its development goal is to obtain a material that can meet the many stringent requirements of practical hydrogen storage applications in the field of automobile transportation, which mainly includes the ability to store a large amount of hydrogen in a lightweight and compact manner, capable of Rapid hydrogen charging, economical, safe and easy to mass-produce. The U.S. Department of Energy worked closely with the automotive industry to formulate performance indicators for vehicle-mounted hydrogen storage systems, with a weight hydrogen storage density of 5.5wt% (1.8kWhkg -1 ), the volumetric energy density is 1.3kWhL -1 (0....

Claims

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Application Information

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IPC IPC(8): G01N1/28G01N23/20
CPCG01N1/28G01N23/20
Inventor 程宏辉李康阎永柯韩兴博滕云雷王宇严凯靳惠明秦康生
Owner YANGZHOU UNIV
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