Method for detecting light rare earth hydride using non-contact raman spectrum

Abstract

The invention relates to a method for detecting light rare earth hydride using non-contact raman spectrum, belongs to the crossing field of material science and substance detection and aims to solve the problem in detection of light rare earth metal hydride and detection of types of surface impurity. The method comprises the step of putting the light rare earth metal hydride which needs to be detected into a colorless and transparent bottle, adding a dispersant subjected to anhydrous and anaerobic treatment into the bottle, and sealing; performing scan detection by using a raman spectrometer, removing the sealed bottle and characteristic peak of the dispersant to obtain a spectrogram peak curve and data of the light rare earth metal hydride; then comparing with a curve and the peak value of the standard raman spectrum of the corresponding light rare earth metal oxide and light rare earth metal hydride, and determining substance types of related major impurity in a sample to be detected. The method provided by the invention is convenient for detection, easy to operate, high in accuracy, safe and reliable in detection process, low in requirements on testing environment, simple in sample preparation and low in economic cost.

Description

technical field

[0001] The invention relates to a method for non-contact Raman spectrum detection of rare earth metal hydrides, which belongs to the cross field of material science and substance detection. Background technique

[0002] Rare earth metal hydrogen storage material is a kind of metal hydrogen storage material with good performance and wide application. Its application fields have been expanded to energy, chemical industry, electronics, aerospace, military and civilian fields. Rare earth hydrogen storage alloys used for chemical heat storage and chemical heat pumps can recover and heat up low-quality heat such as waste heat from factories, thus opening up new ways for humans to effectively utilize various energy sources. The pressure generated when the rare earth hydrogen storage material is used to release hydrogen can be used as a thermal drive power. The use of rare earth hydrogen storage alloys can achieve small size, light weight, and high output power, and ...

Examples

Embodiment 1

[0022] A method for non-contact Raman spectroscopy detection of rare earth metal hydrides, the specific steps are as follows:

[0023] Step 1, in a vacuum environment, under the protection of an inert gas, grind the cerium hydride sample to be detected into a 100-mesh powder and place it in a quartz sample bottle, then add 20ml of anhydrous and oxygen-free aviation kerosene to the bottle, Take out after sealing to obtain a sealed bottle;

[0024] Step 2, the sealed bottle obtained in step 1 is scanned and detected with a Raman spectrometer, and the characteristic peaks of the sealed bottle and dispersant aviation kerosene are removed to obtain the spectrogram peak curve and data of the tested sample, and it is found that the tested Raman spectral curve is at 620cm -1 nearby, 880cm -1 near and 1300cm -1 There are obvious characteristic peaks nearby;

[0025] Step 3, compare the Raman spectrum of the sample obtained in step 2 with the corresponding cerium trihydride (CeH 3 )...

Embodiment 2

[0027] Step 1: Grind the lanthanum hydride powder to be detected into a 100-mesh powder under the protection of an inert gas in a vacuum environment and place it in a polystyrene sample bottle, and then add 30ml of anhydrous and oxygen-free tetrachloride to the bottle. Carbonization solution is taken out after sealing to obtain a sealed bottle;

[0028] Step 2. Scan the sealed bottle obtained in step 1 with a Raman spectrometer to remove the characteristic peaks of the sealed bottle and dispersant to obtain the peak curve and data of the tested sample. It is found that the tested Raman spectrum curve is at 257cm -1 nearby, 321cm -1 nearby, 418cm -1 nearby, 570cm -1 nearby, 629cm -1 nearby, 873cm -1 near and 958cm -1 There are obvious characteristic peaks nearby;

[0029] Step 3, compare the sample Raman spectrum curve obtained in step 2 with the corresponding lanthanum trihydride (LaH 3 ), lanthanum oxide (La 2 o 3 ) and lanthanum dihydride (LaH 2 ) standard Raman sp...

Embodiment 4

[0031] Step 1: Grind the praseodymium hydride powder to be detected into a 100-mesh powder under the protection of an inert gas in a vacuum environment and place it in a sample bottle made of polymethyl methacrylate, then add 35ml to the bottle and treat it with anhydrous and oxygen-free treatment. The toluene solution is taken out after sealing to obtain a sealed bottle;

[0032] Step 2. Scan the sealed bottle obtained in step 1 with a Raman spectrometer to remove the characteristic peaks of the sealed bottle and dispersant to obtain the peak curve and data of the tested sample. It is found that the tested Raman spectrum curve is at 297cm -1 nearby, 517cm -1 nearby, 769cm -1 near and 877cm -1 There are obvious characteristic peaks nearby;

[0033] Step 3, compare the sample Raman spectrum curve obtained in step 2 with the corresponding praseodymium trihydrogen (PrH 3 ) and praseodymium hydride (PrH 2 ) standard Raman spectrum for curve and characteristic peak data compar...

technical field

[0001] The invention relates to a method for non-contact Raman spectrum detection of rare earth metal hydrides, which belongs to the cross field of material science and substance detection. Background technique

[0002] Rare earth metal hydrogen storage material is a kind of metal hydrogen storage material with good performance and wide application. Its application fields have been expanded to energy, chemical industry, electronics, aerospace, military and civilian fields. Rare earth hydrogen storage alloys used for chemical heat storage and chemical heat pumps can recover and heat up low-quality heat such as waste heat from factories, thus opening up new ways for humans to effectively utilize various energy sources. The pressure generated when the rare earth hydrogen storage material is used to release hydrogen can be used as a thermal drive power. The use of rare earth hydrogen storage alloys can achieve small size, light weight, and high output power, and ...

Examples

Embodiment 1

[0022] A method for non-contact Raman spectroscopy detection of rare earth metal hydrides, the specific steps are as follows:

[0023] Step 1, in a vacuum environment, under the protection of an inert gas, grind the cerium hydride sample to be detected into a 100-mesh powder and place it in a quartz sample bottle, then add 20ml of anhydrous and oxygen-free aviation kerosene to the bottle, Take out after sealing to obtain a sealed bottle;

[0024] Step 2, the sealed bottle obtained in step 1 is scanned and detected with a Raman spectrometer, and the characteristic peaks of the sealed bottle and dispersant aviation kerosene are removed to obtain the spectrogram peak curve and data of the tested sample, and it is found that the tested Raman spectral curve is at 620cm -1 nearby, 880cm -1 near and 1300cm -1 There are obvious characteristic peaks nearby;

[0025] Step 3, compare the Raman spectrum of the sample obtained in step 2 with the corresponding cerium trihydride (CeH 3 )...

Embodiment 2

[0027] Step 1: Grind the lanthanum hydride powder to be detected into a 100-mesh powder under the protection of an inert gas in a vacuum environment and place it in a polystyrene sample bottle, and then add 30ml of anhydrous and oxygen-free tetrachloride to the bottle. Carbonization solution is taken out after sealing to obtain a sealed bottle;

[0028] Step 2. Scan the sealed bottle obtained in step 1 with a Raman spectrometer to remove the characteristic peaks of the sealed bottle and dispersant to obtain the peak curve and data of the tested sample. It is found that the tested Raman spectrum curve is at 257cm -1 nearby, 321cm -1 nearby, 418cm -1 nearby, 570cm -1 nearby, 629cm -1 nearby, 873cm -1 near and 958cm -1 There are obvious characteristic peaks nearby;

[0029] Step 3, compare the sample Raman spectrum curve obtained in step 2 with the corresponding lanthanum trihydride (LaH 3 ), lanthanum oxide (La 2 o 3 ) and lanthanum dihydride (LaH 2 ) standard Raman sp...

Embodiment 4

[0031] Step 1: Grind the praseodymium hydride powder to be detected into a 100-mesh powder under the protection of an inert gas in a vacuum environment and place it in a sample bottle made of polymethyl methacrylate, then add 35ml to the bottle and treat it with anhydrous and oxygen-free treatment. The toluene solution is taken out after sealing to obtain a sealed bottle;

[0032] Step 2. Scan the sealed bottle obtained in step 1 with a Raman spectrometer to remove the characteristic peaks of the sealed bottle and dispersant to obtain the peak curve and data of the tested sample. It is found that the tested Raman spectrum curve is at 297cm -1 nearby, 517cm -1 nearby, 769cm -1 near and 877cm -1 There are obvious characteristic peaks nearby;

[0033] Step 3, compare the sample Raman spectrum curve obtained in step 2 with the corresponding praseodymium trihydrogen (PrH 3 ) and praseodymium hydride (PrH 2 ) standard Raman spectrum for curve and characteristic peak data compar...

Images