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A kind of preparation method of synchrotron radiation X-ray absorption fine structure test sample

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

Active Publication Date: 2018-04-13
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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  • A kind of preparation method of synchrotron radiation X-ray absorption fine structure test sample
  • A kind of preparation method of synchrotron radiation X-ray absorption fine structure test sample
  • A kind of preparation method of synchrotron radiation X-ray absorption fine structure test sample

Examples

Experimental program
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Effect test

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 test sample for synchrotron radiation X-ray absorption fine structure of a hydrogen storage material, which relates to the technical field of hydrogen storage materials. In an argon or nitrogen atmosphere, one of LiF or BN is mixed and ground with a sample to be tested to obtain The mixed powder with a particle size of 30-38 μm is molded, and the pressed sample is packaged in a double-mirror stainless steel plate with a through hole that is larger than the pressed sample and thicker than the pressed sample, and then sealed on the double-mirror surface. Pressed samples in stainless steel plates are stored in metal containers filled with argon or nitrogen. The invention ensures that the sample can be stored in a closed argon or nitrogen atmosphere without oxidation for a long time, and the surrounding rigid stainless steel metal plate also plays a good role in protecting the pressed sample block, so that it will not be damaged due to unexpected reasons. The pressed sample block cracks or breaks, which is conducive to long-distance delivery and carrying.

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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Patent Type & Authority Patents(China)
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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