CN113984738A - LIBS-based detection method for spatial quantitative uniform distribution of calcium element in magnesium aluminate spinel - Google Patents
LIBS-based detection method for spatial quantitative uniform distribution of calcium element in magnesium aluminate spinel Download PDFInfo
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Abstract
The invention discloses a LIBS-based method for detecting the spatial quantitative uniform distribution of calcium in magnesium aluminate spinel, which specifically comprises the following steps: step one, sample preparation; step two, array scanning; step three, wavelength positioning; step four, establishing a calibration curve; step five, establishing a distribution diagram: the invention relates to the technical field of element space distribution detection, and discloses a visual distribution diagram for calcium element mass fraction established according to a calibration curve of calcium element established in the fourth step. The LIBS-based method for detecting the spatial quantitative uniformity distribution of the calcium element in the magnesium aluminate spinel reduces the influence of plasma signal fluctuation, is beneficial to improving the measurement repetition rate and the measurement precision, realizes the detection of the rapid spatial quantitative uniformity distribution of the calcium element in the magnesium aluminate spinel, has the characteristics of simple operation, rapid field analysis and the like, and can provide reference for developing a portable detector for the spatial quantitative uniformity distribution of the calcium element in the magnesium aluminate spinel.
Description
Technical Field
The invention relates to the technical field of element space distribution detection, in particular to a LIBS-based method for detecting the space quantitative uniform distribution of calcium elements in magnesium aluminate spinel.
Background
The magnesia-alumina spinel transparent ceramic has excellent mechanical properties, high optical transmittance in the visible infrared band and excellent corrosion resistance and wear resistance, and is widely applied to the fields of transparent armors, missile fairings, spacecraft windows and the like. In the process of preparing magnesium aluminate spinel by non-reaction sintering, calcium oxide with different content is often added as a sintering aid. Experiments show that the uniformity of the sintering aid calcium oxide in the mixed material has important influence on the optical property and the mechanical property of the magnesia-alumina spinel ceramic. Therefore, the detection of the spatial distribution of the calcium element in the magnesium aluminate spinel is of great significance for preparing high-performance transparent ceramics. At present, the main methods for detecting the spatial distribution of surface elements of an experimental sample include X-ray energy spectrum analysis surface scanning, spectrum analysis and the like. Although the methods have high detection degree, the samples need to be pretreated and prepared, the detection can only be completed in a laboratory, the requirements on the professional degree of operators are high, the detection process is complex, the period is long, and the requirements on rapid online detection of calcium in the magnesium aluminate spinel cannot be met.
The LIBS is a method for analyzing substance components based on atomic emission spectroscopy, can perform qualitative and quantitative analysis, and has the advantages that the LIBS does not need sample pretreatment, and full-element synchronous rapid measurement and the like, so that the LIBS is gradually developed into a potential material component online detection technology. The working principle is that high-intensity pulse laser beams are radiated to the surface of a measured sample through a light path, a small volume of an analyzed area is ionized by extreme preheating, and transient laser plasma is generated above the radiated area. The light emitted by the transient laser plasma plume depends on the element components of the ablated material, and is used for analyzing the emitted spectrum by a spectrometer, so that a qualitative or quantitative result of an analyzed area can be obtained. Typical LIBS technology has an ablation area of less than 1mm2Ablation depth is lower than 1um, and ablation amount is microgram magnitude, so LIBS is a micro-damage or quasi-nondestructive detection method.
Although the intensity of an analysis line is in direct proportion to the element content, the spectral intensity is changed due to the influence of factors such as matrix effect and laser pulse energy fluctuation, so that errors are directly brought to the element content measurement.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides a LIBS-based method for detecting the spatial quantitative uniformity distribution of calcium in magnesium aluminate spinel, which solves the problems.
(II) technical scheme
In order to achieve the purpose, the invention provides the following technical scheme: a LIBS-based detection method for the spatial quantitative uniformity distribution of calcium in magnesium aluminate spinel specifically comprises the following steps:
step one, sample preparation: preparing samples containing different calcium concentrations by adding calcium oxide into a main raw material of magnesium aluminate spinel, and preparing tabletting samples;
step two, array scanning: placing the tabletting sample prepared in the first step in a three-axis displacement platform, and performing array scanning by using a laser-induced breakdown spectroscopy technology to obtain the spectral intensity value distribution of the element to be detected on the sample;
step three, wavelength positioning: finding out the wavelengths corresponding to the magnesium, aluminum and calcium elements according to the one-to-one correspondence relationship between the wavelengths and the elements in the LIBS spectral data;
step four, establishing a calibration curve: preprocessing all original LIBS spectral data, and establishing a calibration curve of calcium element;
step five, establishing a distribution diagram: and establishing a visual distribution diagram of the calcium element mass fraction according to the calibration curve of the calcium element established in the fourth step.
By adopting the technical scheme, the rapid detection of the spatial quantitative uniformity distribution of the calcium element in the magnesium aluminate spinel is realized, the method has the characteristics of simple operation, rapid on-site analysis and the like, and can provide reference for developing a portable detection instrument for the spatial quantitative uniformity distribution of the calcium element in the magnesium aluminate spinel.
The invention is further configured to: in the first step, in the main raw materials of the magnesium aluminate spinel, the mass ratio of magnesium oxide to aluminum oxide is 3: and 7, adding calcium oxide with the mass fractions of 1 wt%, 2 wt%, 3 wt%, 4 wt% and 5 wt%, respectively.
The invention is further configured to: the parameters of the tabletting sample in the first step are as follows: weight 0.2g, pressure 10MPa, and holding time 5 min.
The invention is further configured to: in the second step, the optimal parameters in the laser-induced breakdown spectroscopy experiment are as follows: the laser energy was 39mj, the laser wavelength was 1064nm, the delay time was 1.4us, the exposure time was 1000ms, the spectrometer gain was 2000, the gate width time was 150us, and the laser frequency was 10 Hz.
The invention is further configured to: in the second step, the LIBS array scanning system is controlled by an upper computer written by labview and a python script, the array scanning parameter is 5 x 5, and each sample generates 25 spectral data in total.
The invention is further configured to: and in the third step, determining that the main characteristic spectral lines of the magnesium element have the following characteristics according to the characteristic wavelengths calibrated by the atomic spectrum database and the test system: mg I516.732 nm, Mg I517.268 nm and Mg I518.36 nm; the main characteristic spectral lines of the aluminum element are as follows: al I394.4 nm and Al I396.152 nm; the main characteristic spectral lines of calcium element are as follows: ca II 393.366nm, Ca I422.673 nm and Ca I430.253 nm.
By adopting the technical scheme, representative wavelengths of calcium, aluminum and magnesium elements are selected, and the development of a portable laser-induced breakdown spectrometer is facilitated.
The invention is further configured to: in the fourth step, the preprocessing refers to normalization processing of the spectral intensity values, and the spectral formula based on the intensity normalization method principle is as follows:
in the formula I1And I2The peak intensities of the analysis line and the inner marked line respectively,
and
respectively, the ideal peak intensity, Δ I1And Δ I2Respectively, the difference of the actual spectral line intensity from the mean peak intensity, where in general Δ I1And Δ I2Are each much smaller than
And
therefore, Δ I can be ignored in the calculation1And Δ I2The effect of (c) can be expressed as.
By adopting the technical scheme, through spectrum pretreatment, the peak intensity of the analysis line after intensity normalization treatment does not contain a part with fluctuation of errors, namely, an intensity normalization method is utilized, the relative peak intensity value of a spectral line can be obtained under the same condition, the deviation caused by fluctuation of various parameters is weakened by calculating the peak intensity ratio of the line to be analyzed and the calibration line, the influence of fluctuation of plasma signals is reduced, the measurement repetition rate and the measurement precision are favorably improved, the spectrum data is pretreated by using the intensity normalization method, the defect of large errors caused by factors such as matrix effect, laser energy pulse fluctuation and the like is reduced, and the accuracy of the quantitative analysis of calcium elements is improved.
The invention is further configured to: in the fifth step, the 25 spectral data in one sample are converted into the mass fraction of the calcium element through a calcium element calibration curve and combined with the position of an ablation point, the image is subjected to pseudo color processing, samples with different calcium element contents are distinguished by different colors, and the visual distribution of the calcium element content in the magnesium aluminate spinel sample is realized.
(III) advantageous effects
The invention provides a LIBS-based method for detecting the spatial quantitative uniform distribution of calcium in magnesium aluminate spinel. The method has the following beneficial effects:
(1) according to the LIBS-based method for detecting the spatial quantitative uniformity distribution of the calcium element in the magnesium aluminate spinel, through spectrum pretreatment, the peak intensity of an analysis line subjected to intensity normalization treatment does not contain a part with fluctuating errors, namely, the intensity normalization method is utilized, so that the relative peak intensity value of a spectral line can be obtained under the same condition, through calculating the peak intensity ratio of the line to be analyzed and a calibration line, the deviation caused by fluctuation of various parameters is weakened, the influence of fluctuation of plasma signals is reduced, the measurement repetition rate and the measurement precision are favorably improved, and the quantitative detection of the calcium element in the magnesium aluminate spinel is realized.
(2) The LIBS-based detection method for the spatial quantitative uniformity distribution of the calcium element in the magnesium aluminate spinel realizes the spatial quantitative uniformity distribution detection of the calcium element by utilizing the laser-induced breakdown spectroscopy technology, has the characteristics of simplicity in operation, rapidness, high efficiency and the like, and effectively overcomes the defects of complex program, high cost, large damage to a sample and the like of the traditional detection method for the spatial distribution of the element.
(3) According to the LIBS-based detection method for the spatial quantitative uniformity distribution of the calcium element in the magnesium aluminate spinel, the intensity normalization method is used for preprocessing the spectral data, the defect of large error caused by matrix effect, laser energy pulse fluctuation and other factors is overcome, and the accuracy of the quantitative analysis of the calcium element is improved.
(4) According to the LIBS-based detection method for the spatial quantitative uniformity distribution of the calcium element in the magnesium aluminate spinel, the calcium element quantitative analysis result is combined with the position of an ablation point, the pseudo color processing is performed on the image, and the visualization of the spatial quantitative distribution of the calcium element is realized.
(5) According to the LIBS-based detection method for the spatial quantitative uniformity distribution of the calcium element in the magnesium aluminate spinel, the wavelengths of the representative calcium element, aluminum element and magnesium element are selected, and the development of a portable laser-induced breakdown spectrometer is facilitated.
Drawings
FIG. 1 is a flow chart of the detection method of the present invention;
FIG. 2 is a graph of the calibration of an internal standard of calcium and aluminum in accordance with the present invention;
FIG. 3 is a LIBS array scan of a magnesium aluminate spinel pellet sample of the present invention;
FIG. 4 is a diagram showing the spatial quantitative uniformity distribution of calcium element obtained after data processing according to the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-4, the embodiment of the present invention provides the following two technical solutions:
the first embodiment,
A LIBS-based detection method for the spatial quantitative uniformity distribution of calcium in magnesium aluminate spinel specifically comprises the following steps:
step one, sample preparation: preparing samples containing different calcium concentrations by adding calcium oxide into a main raw material of magnesium aluminate spinel, and preparing tabletting samples;
step two, array scanning: placing the tabletting sample prepared in the first step in a three-axis displacement platform, and performing array scanning by using a laser-induced breakdown spectroscopy technology to obtain the spectral intensity value distribution of the element to be detected on the sample;
step three, wavelength positioning: finding out the wavelengths corresponding to the magnesium, aluminum and calcium elements according to the one-to-one correspondence relationship between the wavelengths and the elements in the LIBS spectral data;
step four, establishing a calibration curve: preprocessing all original LIBS spectral data, and establishing a calibration curve of calcium element;
step five, establishing a distribution diagram: and establishing a visual distribution map of the mass fraction of the calcium element according to the calibration curve of the calcium element established in the fourth step, further explaining that the rapid spatial quantitative uniformity distribution of the calcium element in the magnesium aluminate spinel is detected, the method has the characteristics of simple operation, rapid field analysis and the like, and can provide reference for developing a portable detector for the spatial quantitative uniformity distribution of the calcium element in the magnesium aluminate spinel.
Example II,
As an improvement of the previous embodiment, the present embodiment provides a method for detecting spatial quantitative uniformity distribution of calcium in magnesium aluminate spinel based on LIBS, which specifically includes the following steps:
step one, sample preparation: the mass fraction ratio of the magnesium oxide to the aluminum oxide is 3: 7, adding calcium oxide powder with different mass fractions after mixing, wherein the CAS 1344-28-1, the CAS 1309-48-4 and the CAS 1305-78-8 are respectively selected from the aluminum oxide powder, the magnesium oxide powder and the calcium oxide powder to obtain five mixed powders with different mass fractions, the mass fractions of the calcium oxide are respectively 1 wt%, 2 wt%, 3 wt%, 4 wt% and 5 wt%, fully grinding and drying the three powders after mixing, using a tablet press to keep 10MPa pressure for 5min, preparing the mixed powders of the three powders into round samples with the specification of 10mm in diameter and 1mm in thickness, the mass of each sample is 0.2g, preparing 10 samples for each sample, and obtaining 50 magnesium aluminate spinel tablet samples for experiments;
step two, array scanning: placing the tabletting samples prepared in the first step in a three-axis displacement platform, setting parameters of a laser-induced breakdown spectroscopy experimental instrument according to the laser energy of 39mj, the laser wavelength of 1064nm, the delay time of 1.4us, the exposure time of 1000ms, the spectrometer gain of 2000, the gate width time of 150us and the laser frequency of 10Hz, placing the tabletting samples in the three-dimensional displacement platform, setting excitation parameters by using control software compiled by labview software, enabling each tabletting sample to uniformly strike 25 different point locations as shown in figure 3, and accumulating 10 laser pulses at each point location;
step three, wavelength positioning: according to the characteristic wavelengths calibrated by an NIST atomic spectrum database and a test system, the main characteristic spectral lines of the magnesium element are determined as follows: mg I516.732 nm, Mg I517.268 nm and Mg I518.36 nm; the main characteristic spectral lines of the aluminum element are as follows: al I394.4 nm and Al I396.152 nm; the main characteristic spectral lines of calcium element are as follows: ca II 393.366nm, Ca I422.673 nm and Ca I430.253 nm;
step four, establishing a calibration curve: after preprocessing all original LIBS spectral data, establishing a calibration curve of calcium element, removing outliers from the original spectral data, smoothing, performing wavelet transformation and denoising, and then respectively using aluminum element and magnesium element as internal standard elements and analyzing element calcium to perform normalization processing, specifically, a spectral formula based on the principle of an intensity normalization method is as follows:
in the formula I1And I2The peak intensities of the analysis line and the inner marked line respectively,
and
respectively, the ideal peak intensity, Δ I1And Δ I2Respectively, the difference of the actual spectral line intensity from the mean peak intensity, where in general Δ I1And Δ I2Are each much smaller than
And
therefore, Δ I can be ignored in the calculation1And Δ I2The influence of (3) can be expressed as that the optimal internal standard element is selected through linear fitting to obtain a calcium element calibration curve shown in figure 2;
step five, establishing a distribution diagram: converting 25 spectral data in one sample into the mass fraction of calcium element through a calcium element calibration curve, combining the mass fraction with the position of an ablation point, performing pseudo color processing on the image, and distinguishing samples with different calcium element contents by using different colors, such as fig. 4, to realize visual distribution of the calcium element content in the magnesium aluminate spinel sample.
The advantages of the second embodiment over the first embodiment are: the analysis line peak intensity after intensity normalization processing does not contain a part with fluctuation of errors, namely, an intensity normalization method is utilized, so that the relative peak intensity value of a spectral line can be obtained under the same condition, the deviation caused by fluctuation of various parameters is weakened by calculating the peak intensity ratio of a line to be analyzed and a calibration line, the influence of fluctuation of plasma signals is reduced, the measurement repetition rate and the measurement precision are favorably improved, the calcium element quantitative analysis result is combined with the position of a ablation point, and the pseudo color processing is carried out on an image, so that the visualization of the quantitative spatial distribution of calcium elements is realized, the wavelength of representative calcium, aluminum and magnesium elements is selected, and the development of a portable laser induced breakdown spectrometer is favorably realized.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. A LIBS-based detection method for the spatial quantitative uniformity distribution of calcium in magnesium aluminate spinel is characterized by comprising the following steps: the method specifically comprises the following steps:
step one, sample preparation: preparing samples containing different calcium concentrations by adding calcium oxide into a main raw material of magnesium aluminate spinel, and preparing tabletting samples;
step two, array scanning: placing the tabletting sample prepared in the first step in a three-axis displacement platform, and performing array scanning by using a laser-induced breakdown spectroscopy technology to obtain the spectral intensity value distribution of the element to be detected on the sample;
step three, wavelength positioning: finding out the wavelengths corresponding to the magnesium, aluminum and calcium elements according to the one-to-one correspondence relationship between the wavelengths and the elements in the LIBS spectral data;
step four, establishing a calibration curve: preprocessing all original LIBS spectral data, and establishing a calibration curve of calcium element;
step five, establishing a distribution diagram: and establishing a visual distribution diagram of the calcium element mass fraction according to the calibration curve of the calcium element established in the fourth step.
2. The method for detecting the spatial quantitative uniformity distribution of calcium element in the LIBS-based magnesium aluminate spinel according to claim 1, wherein the method comprises the following steps: in the first step, in the main raw materials of the magnesium aluminate spinel, the mass ratio of magnesium oxide to aluminum oxide is 3: and 7, adding calcium oxide with the mass fractions of 1 wt%, 2 wt%, 3 wt%, 4 wt% and 5 wt%, respectively.
3. The method for detecting the spatial quantitative uniformity distribution of calcium element in the LIBS-based magnesium aluminate spinel according to claim 1, wherein the method comprises the following steps: the parameters of the tabletting sample in the first step are as follows: weight 0.2g, pressure 10MPa, and holding time 5 min.
4. The method for detecting the spatial quantitative uniformity distribution of calcium element in the LIBS-based magnesium aluminate spinel according to claim 1, wherein the method comprises the following steps: in the second step, the optimal parameters in the laser-induced breakdown spectroscopy experiment are as follows: the laser energy was 39mj, the laser wavelength was 1064nm, the delay time was 1.4us, the exposure time was 1000ms, the spectrometer gain was 2000, the gate width time was 150us, and the laser frequency was 10 Hz.
5. The method for detecting the spatial quantitative uniformity distribution of calcium element in the LIBS-based magnesium aluminate spinel according to claim 1, wherein the method comprises the following steps: in the second step, the LIBS array scanning system is controlled by an upper computer written by labview and a python script, the array scanning parameter is 5 x 5, and each sample generates 25 spectral data in total.
6. The method for detecting the spatial quantitative uniformity distribution of calcium element in the LIBS-based magnesium aluminate spinel according to claim 1, wherein the method comprises the following steps: and in the third step, determining that the main characteristic spectral lines of the magnesium element have the following characteristics according to the characteristic wavelengths calibrated by the atomic spectrum database and the test system: mg I516.732 nm, Mg I517.268 nm and Mg I518.36 nm; the main characteristic spectral lines of the aluminum element are as follows: al I394.4 nm and Al I396.152 nm; the main characteristic spectral lines of calcium element are as follows: ca II 393.366nm, Ca I422.673 nm and Ca I430.253 nm.
7. The method for detecting the spatial quantitative uniformity distribution of calcium element in the LIBS-based magnesium aluminate spinel according to claim 1, wherein the method comprises the following steps: in the fourth step, the preprocessing refers to normalization processing of the spectral intensity values, and the spectral formula based on the intensity normalization method principle is as follows:
in the formula I1And I2The peak intensities of the analysis line and the inner marked line respectively,
and
respectively, the ideal peak intensity, Δ I1And Δ I2Respectively, the difference of the actual spectral line intensity from the mean peak intensity, where in general Δ I1And Δ I2Are each much smaller than
And
therefore, Δ I can be ignored in the calculation1And Δ I2The effect of (c) can be expressed as.
8. The method for detecting the spatial quantitative uniformity distribution of calcium element in the LIBS-based magnesium aluminate spinel according to claim 1, wherein the method comprises the following steps: in the fifth step, the 25 spectral data in one sample are converted into the mass fraction of the calcium element through a calcium element calibration curve and combined with the position of an ablation point, the image is subjected to pseudo color processing, samples with different calcium element contents are distinguished by different colors, and the visual distribution of the calcium element content in the magnesium aluminate spinel sample is realized.
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107721406A (en) * | 2017-10-12 | 2018-02-23 | 中国科学院上海硅酸盐研究所 | A kind of method for preparing high light transmittance light-weight magnesite-alumina spinel refractories |
| CN109187498A (en) * | 2018-08-31 | 2019-01-11 | 浙江大学 | The rapid detection method of soil calcium constituent based on conllinear double-pulse laser induced breakdown spectrum |
-
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- 2021-10-29 CN CN202111268138.6A patent/CN113984738A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107721406A (en) * | 2017-10-12 | 2018-02-23 | 中国科学院上海硅酸盐研究所 | A kind of method for preparing high light transmittance light-weight magnesite-alumina spinel refractories |
| CN109187498A (en) * | 2018-08-31 | 2019-01-11 | 浙江大学 | The rapid detection method of soil calcium constituent based on conllinear double-pulse laser induced breakdown spectrum |
Non-Patent Citations (3)
| Title |
|---|
| 汪家升等: "强度归一化法定量分析岩石激光诱导击穿光谱", 《中国激光》 * |
| 陈友红，邬显慷，朱节清，谷英梅，李晓林，陆荣荣，张旗，徐平，李秀云，黄忠祥: "尖晶石－石榴石相转变过程中矿物的微量元素组成与分布特征", 《核技术》 * |
| 陈启蒙等: "激光诱导击穿光谱技术成分面扫描分析与应用", 《光谱学与光谱分析》 * |
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Application publication date: 20220128 |