CN106769982A - The assay method of carborundum content in a kind of composite material of silicon carbide - Google Patents
The assay method of carborundum content in a kind of composite material of silicon carbide Download PDFInfo
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- CN106769982A CN106769982A CN201611138862.6A CN201611138862A CN106769982A CN 106769982 A CN106769982 A CN 106769982A CN 201611138862 A CN201611138862 A CN 201611138862A CN 106769982 A CN106769982 A CN 106769982A
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- silicon carbide
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- 229910010271 silicon carbide Inorganic materials 0.000 title claims abstract description 101
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 title claims abstract description 45
- 239000002131 composite material Substances 0.000 title claims abstract description 44
- 238000003556 assay Methods 0.000 title claims description 23
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 38
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 38
- 239000000843 powder Substances 0.000 claims abstract description 18
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims abstract description 17
- 239000000919 ceramic Substances 0.000 claims abstract description 16
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 10
- 229910002092 carbon dioxide Inorganic materials 0.000 claims abstract description 10
- 229910052802 copper Inorganic materials 0.000 claims abstract description 10
- 239000010949 copper Substances 0.000 claims abstract description 10
- 238000001354 calcination Methods 0.000 claims abstract description 8
- 239000001569 carbon dioxide Substances 0.000 claims abstract description 8
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 claims abstract description 8
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 claims abstract description 4
- 238000002485 combustion reaction Methods 0.000 claims abstract description 4
- 229910001882 dioxygen Inorganic materials 0.000 claims abstract description 4
- 230000010354 integration Effects 0.000 claims abstract description 4
- 239000000203 mixture Substances 0.000 claims abstract description 4
- 229910052697 platinum Inorganic materials 0.000 claims abstract description 4
- 238000004458 analytical method Methods 0.000 claims description 24
- GJEAMHAFPYZYDE-UHFFFAOYSA-N [C].[S] Chemical compound [C].[S] GJEAMHAFPYZYDE-UHFFFAOYSA-N 0.000 claims description 9
- 239000000463 material Substances 0.000 claims description 7
- 239000007789 gas Substances 0.000 claims description 6
- 238000005303 weighing Methods 0.000 claims description 6
- 239000012159 carrier gas Substances 0.000 claims description 4
- 230000004907 flux Effects 0.000 claims description 4
- 239000006199 nebulizer Substances 0.000 claims description 4
- 230000003287 optical effect Effects 0.000 claims description 3
- 229910003978 SiClx Inorganic materials 0.000 claims description 2
- -1 silicon carbide compound Chemical class 0.000 claims description 2
- YQCIWBXEVYWRCW-UHFFFAOYSA-N methane;sulfane Chemical compound C.S YQCIWBXEVYWRCW-UHFFFAOYSA-N 0.000 claims 2
- 238000010521 absorption reaction Methods 0.000 abstract description 10
- 238000001514 detection method Methods 0.000 abstract description 10
- 238000000034 method Methods 0.000 abstract description 5
- 239000000126 substance Substances 0.000 abstract description 5
- 238000006243 chemical reaction Methods 0.000 abstract description 3
- 238000002474 experimental method Methods 0.000 description 4
- 238000005259 measurement Methods 0.000 description 4
- 230000006698 induction Effects 0.000 description 3
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 2
- GCNLQHANGFOQKY-UHFFFAOYSA-N [C+4].[O-2].[O-2].[Ti+4] Chemical compound [C+4].[O-2].[O-2].[Ti+4] GCNLQHANGFOQKY-UHFFFAOYSA-N 0.000 description 2
- 229910052571 earthenware Inorganic materials 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000003758 nuclear fuel Substances 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- 229910052717 sulfur Inorganic materials 0.000 description 2
- 239000011593 sulfur Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 229910001093 Zr alloy Inorganic materials 0.000 description 1
- IUHFWCGCSVTMPG-UHFFFAOYSA-N [C].[C] Chemical class [C].[C] IUHFWCGCSVTMPG-UHFFFAOYSA-N 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 239000006229 carbon black Substances 0.000 description 1
- 239000003575 carbonaceous material Substances 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 239000011258 core-shell material Substances 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 125000004435 hydrogen atom Chemical class [H]* 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
- G01N21/35—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light
- G01N21/3563—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light for analysing solids; Preparation of samples therefor
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
- G01N21/35—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light
- G01N21/3563—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light for analysing solids; Preparation of samples therefor
- G01N2021/3572—Preparation of samples, e.g. salt matrices
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2201/00—Features of devices classified in G01N21/00
- G01N2201/12—Circuits of general importance; Signal processing
- G01N2201/123—Conversion circuit
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2201/00—Features of devices classified in G01N21/00
- G01N2201/12—Circuits of general importance; Signal processing
- G01N2201/125—Digital circuitry
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- Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
The invention belongs to chemical detection method technical field, and in particular to using carbon content in infrared absorption determining composite material of silicon carbide, the specific method of carborundum content is then drawn by conversion.Comprise the following steps:(1) composite material of silicon carbide sample is placed in constant weight platinum crucible, is placed on Muffle furnace calcination except carbon;(2) copper is weighed, ceramic crucible bottom is uniformly layered on;(3) sample is weighed, is placed in ceramic crucible;(4) ceramic crucible is placed in Efco-Northrup furnace together with sample powder, makes sample melt-combustion;(5) carbon dioxide for producing that composite material of silicon carbide sample powder burnt with high purity oxygen gas is carried and enters carbon dioxide absorption pond;(6) comparator level is set, and the integration spectrogram to being formed is modified, peak area is calculated;(7) calculate, obtain the mass fraction of carbon in carborundum sample, the percentage composition of carborundum is converted into according to chemistry.The carbon content of carborundum can be accurately determined using the above method.
Description
Technical field
The invention belongs to chemical detection method technical field, and in particular to using infrared absorption determining silicon carbide compound
Carbon content in material, then draws the specific method of carborundum content by conversion.
Background technology
The problems such as zircaloy corrosion present in current light-water reactor, suction hydrogen, core-shell are reacted and generation Ⅳ
System fuel element to the particular/special requirement of material, make with carborundum (SiC) as involucrum or matrix material New-type fuel element
Conceptual design and it is prepared into a new focus for nuclear fuel element field.Wherein the purity of carborundum, directly affects carbon
The performance of SiClx involucrum, or even have influence on the safe operation of light-water reactor.
The current country defines the analysis method of carborundum content in conventional abrasive Wilicon carbide material, but method detection time
Long, accuracy of detection is poor, restrictive condition is more, is not suitable for the high-purity silicon carbide material in nuclear fuel element field, therefore have must
Set up corresponding detection method.
The content of the invention
The technical problem to be solved in the present invention be according to detection requirements of one's work, based on the existing instrument and equipment in laboratory,
The detection method of carborundum content in infrared absorption determining composite material of silicon carbide is set up, scientific research, the need of production detection are met
Ask.
In order to realize this purpose, the present invention is adopted the technical scheme that:
The assay method of carborundum content in a kind of composite material of silicon carbide, is carried out using high frequency infrared ray carbon sulphur analyser,
Comprise the following steps:
(1) composite material of silicon carbide sample is placed in constant weight platinum crucible, is placed on Muffle furnace calcination except carbon, one section of constant weight
Time, the free carbon in removal carborundum sample;
(2) electronic balance weighing 1.5~2.5g copper is used, carbon content is less than 0.001% in copper, and copper is uniformly layered on ceramic earthenware
Crucible bottom;
(3) electronic balance weighing 0.01~0.05g composite material of silicon carbide sample powders are used, load weighted carborundum is answered
Condensation material sample powder is placed in ceramic crucible;
(4) ceramic crucible is placed in Efco-Northrup furnace together with composite material of silicon carbide sample powder, opens high
Frequency induction furnace makes sample melt-combustion;
(5) carbon dioxide for producing that composite material of silicon carbide sample powder burnt with high purity oxygen gas is carried and enters titanium dioxide
Carbon absorption pond, is detected by carbon detector to the infrared light for absorbing, and optical signal is changed into electric signal by A/D change-over panels;
(6) it is 1~3% to set comparator level, and the integration spectrogram to being formed is modified, and calculates peak area;
(7) calculated according to langbobier law, obtained the mass fraction of carbon in carborundum sample, converted according to chemistry
Into the percentage composition of carborundum.
Further, in a kind of composite material of silicon carbide as described above carborundum content assay method, step (1)
In, it is 800 DEG C~850 DEG C that the calcination of Muffle furnace removes carbon temperature.
Further, in a kind of composite material of silicon carbide as described above carborundum content assay method, step (1)
In, the constant weight time is 4h.
Further, in a kind of composite material of silicon carbide as described above carborundum content assay method, step (2)
In, the size of ceramic crucible determines according to the requirement of high frequency infrared ray carbon sulphur analyser.
Further, in a kind of composite material of silicon carbide as described above carborundum content assay method, step (3)
In, the granularity of composite material of silicon carbide sample powder is less than 0.2mm, dries no moisture.
Further, in a kind of composite material of silicon carbide as described above carborundum content assay method, step (4)
In, it is 10~30% to set Efco-Northrup furnace analysis low-power, and analysis high power is 40~50%.
Further, in a kind of composite material of silicon carbide as described above carborundum content assay method, step (4)
In, analysis time is 30~50s.
Further, in a kind of composite material of silicon carbide as described above carborundum content assay method, high frequency-infrared
The model CS600 of carbon and sulfur analytical instrument.
Further, in a kind of composite material of silicon carbide as described above carborundum content assay method, high frequency-infrared
The condition of work of carbon and sulfur analytical instrument is:Carrier gas flux 3.0L/min, analyzes low-power 70%, high power 90% is analyzed, during analysis
Between 50s, comparison level 2%, power atmospheric pressure 40Psi, nebulizer gas pressure 35Psi, system pressure 12Psi.
The beneficial effect of technical solution of the present invention is:
The detection method of carborundum content in infrared absorption determining composite material of silicon carbide is successfully established, using invention
The experiment condition enumerated in content can accurately determine the carbon content of carborundum, quote accurate detection data, effectively coordinate
The carrying out of special production.
Specific embodiment
Technical solution of the present invention is described in detail with reference to specific embodiment.
The assay method of carborundum content in a kind of composite material of silicon carbide of the present invention, using high frequency infrared ray carbon sulphur analyser
Carry out, comprise the following steps:
(1) carborundum sample because of preparation technology the reason for contain certain free carbon, in order in Accurate Determining sample be carbonized
The content of silicon is, it is necessary to by the free carbon removal in sample, it is therefore necessary to carborundum sample is pre-processed so that in sample
Free carbon is without interference with Carbon analysis in carborundum.The amorphous such as carbon black fines, activated carbon carbon simple substance can be anti-with oxygen at 400 DEG C
Carbon dioxide should be generated, and carborundum then needs just make more than 2750 DEG C carbon conversion therein for carbon dioxide is escaped, because
This can carry out the separation of free carbon according to two kinds of properties of carbonaceous material.
Composite material of silicon carbide sample is placed in constant weight platinum crucible, Muffle furnace calcination is placed on except carbon, during one section of constant weight
Between, the free carbon in removal carborundum sample;
In the present embodiment, it is 800 DEG C~850 DEG C that the calcination of Muffle furnace removes carbon temperature, and the constant weight time is 4h;
(2) electronic balance weighing 1.5~2.5g copper is used, carbon content is less than 0.001% in copper, and copper is uniformly layered on ceramic earthenware
Crucible bottom;The size of ceramic crucible determines according to the requirement of high frequency infrared ray carbon sulphur analyser;
(3) when sample weighting amount is too small, balance error is larger;And sample weighting amount it is excessive when, the content of carbon gradually increases in carborundum,
Certain influence is likely to result in for the absorption efficiency of cell for infrared absorption.Therefore, it is carbonized with 0.01~0.05g of electronic balance weighing
Silicon composite sample powder, the granularity of composite material of silicon carbide sample powder is less than 0.2mm, dries no moisture;To weigh
Composite material of silicon carbide sample powder be placed in ceramic crucible;
(4) ceramic crucible is placed in Efco-Northrup furnace together with composite material of silicon carbide sample powder, sets high
Frequency induction furnace analysis low-power is 10~30%, and analysis high power is 40~50%, and analysis time is 30~50s;Open high frequency
Induction furnace makes sample melt-combustion;
(5) carbon dioxide for producing that composite material of silicon carbide sample powder burnt with high purity oxygen gas is carried and enters titanium dioxide
Carbon absorption pond, is detected by carbon detector to the infrared light for absorbing, and optical signal is changed into electric signal by A/D change-over panels;
(6) it is 1~3% to set comparator level, and the integration spectrogram to being formed is modified, and calculates peak area;
(7) calculated according to langbobier law, obtained the mass fraction of carbon in carborundum sample, converted according to chemistry
Into the percentage composition of carborundum.
When determining condition of work, analysis power is too low, and carbon emissions are incomplete;But analysis power is too high, produce dust excessive,
Hinder CO2Transmission or absorb CO2.Comparator be horizontally disposed with it is too low, cause instrument produce foreign gas be integrated, determine knot
It is really higher;And comparator is horizontally disposed with too high, cause sample gas to be unable to complete integral, cause measurement result relatively low, precision is inclined
It is low.The minimum comparator level that selection instrument does not trail is used as experiment parameter.With the increase of comparator level, analysis time is in
Reduction trend, carborundum content measurement result tapers off trend, is consistent with theory analysis situation.
The model CS600 of high frequency infrared ray carbon sulphur analyser, condition of work is:Carrier gas flux 3.0L/min, analyzes low work(
Rate 70%, analysis high power 90%, analysis time 50s, comparison level 2%, power atmospheric pressure 40Psi, nebulizer gas pressure 35Psi,
System pressure 12Psi.
In the present embodiment, precision test is carried out with the carborundum sample of different carborundum contents, it is parallel to weigh 6 examinations
Sample, is analyzed by set test procedure, obtains the measurement result of carborundum content.Knowable to measurement result, silicon carbide sample
The precision of middle carborundum content assay method is better than 10%.Carbon content is in 29% or so, conventional mark-on in carborundum sample
Absorption method cannot meet requirement, and through research, experiment selection carries out mark-on and returns using high-purity calcium carbonate primary standard substance as standard substance
Acceptance test.The rate of recovery meets requirement of experiment between 85%~120%.
Claims (10)
1. in a kind of composite material of silicon carbide carborundum content assay method, carried out using high frequency infrared ray carbon sulphur analyser, its
It is characterised by, comprises the following steps:
(1) composite material of silicon carbide sample is placed in constant weight platinum crucible, is placed on Muffle furnace calcination except carbon, during one section of constant weight
Between, the free carbon in removal carborundum sample;
(2) electronic balance weighing 1.5~2.5g copper is used, carbon content is less than 0.001% in copper, and copper is uniformly layered on ceramic crucible bottom
Portion;
(3) electronic balance weighing 0.01~0.05g composite material of silicon carbide sample powders are used, by load weighted silicon carbide compound material
Material sample powder is placed in ceramic crucible;
(4) ceramic crucible is placed in Efco-Northrup furnace together with composite material of silicon carbide sample powder, opens high frequency sense
Answering stove makes sample melt-combustion;
(5) carbon dioxide for producing that composite material of silicon carbide sample powder burnt with high purity oxygen gas is carried and enters carbon dioxide suction
Receives pond, is detected by carbon detector to the infrared light for absorbing, and optical signal is changed into electric signal by A/D change-over panels;
(6) it is 1~3% to set comparator level, and the integration spectrogram to being formed is modified, and calculates peak area;
(7) calculated according to langbobier law, obtained the mass fraction of carbon in carborundum sample, carbon is converted into according to chemistry
The percentage composition of SiClx.
2. in a kind of composite material of silicon carbide as claimed in claim 1 carborundum content assay method, it is characterised in that:Step
Suddenly in (1), it is 800 DEG C~850 DEG C that the calcination of Muffle furnace removes carbon temperature.
3. in a kind of composite material of silicon carbide as claimed in claim 1 carborundum content assay method, it is characterised in that:Step
Suddenly in (1), the constant weight time is 4h.
4. in a kind of composite material of silicon carbide as claimed in claim 1 carborundum content assay method, it is characterised in that:Step
Suddenly in (2), the size of ceramic crucible determines according to the requirement of high frequency infrared ray carbon sulphur analyser.
5. in a kind of composite material of silicon carbide as claimed in claim 1 carborundum content assay method, it is characterised in that:Step
Suddenly in (3), the granularity of composite material of silicon carbide sample powder is less than 0.2mm, dries no moisture.
6. in a kind of composite material of silicon carbide as claimed in claim 1 carborundum content assay method, it is characterised in that:Step
Suddenly in (4), it is 10~30% to set Efco-Northrup furnace analysis low-power, and analysis high power is 40~50%.
7. in a kind of composite material of silicon carbide as claimed in claim 1 carborundum content assay method, it is characterised in that:Step
Suddenly in (4), analysis time is 30~50s.
8. in a kind of composite material of silicon carbide as claimed in claim 1 carborundum content assay method, it is characterised in that:It is high
The model CS600 of frequency infrared carbon sulfur analyzer.
9. in a kind of composite material of silicon carbide as claimed in claim 1 carborundum content assay method, it is characterised in that:It is high
The condition of work of frequency infrared carbon sulfur analyzer is:Carrier gas flux 3.0L/min, analyzes low-power 70%, analyzes high power 90%,
Analysis time 50s, comparison level 2%, power atmospheric pressure 40Psi, nebulizer gas pressure 35Psi, system pressure 12Psi.
10. in a kind of composite material of silicon carbide as claimed in claim 1 carborundum content assay method, it is characterised in that:
In step (1), it is 800 DEG C~850 DEG C that the calcination of Muffle furnace removes carbon temperature, and the constant weight time is 4h;
In step (2), the size of ceramic crucible determines according to the requirement of high frequency infrared ray carbon sulphur analyser;
In step (3), the granularity of composite material of silicon carbide sample powder is less than 0.2mm, dries no moisture;
In step (4), it is 10~30% to set Efco-Northrup furnace analysis low-power, and analysis high power is 40~50%, during analysis
Between be 30~50s;
The model CS600 of high frequency infrared ray carbon sulphur analyser, condition of work is:Carrier gas flux 3.0L/min, analyzes low-power
70%, analysis high power 90%, analysis time 50s, comparison level 2%, power atmospheric pressure 40Psi, nebulizer gas pressure 35Psi are
System pressure 12Psi.
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Cited By (4)
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CN111175168A (en) * | 2020-02-21 | 2020-05-19 | 东莞东阳光科研发有限公司 | Method for detecting content of silicon dioxide in silicon-based negative electrode material |
CN111721731A (en) * | 2019-03-22 | 2020-09-29 | 上海梅山钢铁股份有限公司 | Method for detecting content of free carbon in blast furnace dust |
CN112746325A (en) * | 2020-12-18 | 2021-05-04 | 国宏中宇科技发展有限公司 | Method for treating and recycling silicon carbide crystal growth excess material |
CN115728114A (en) * | 2022-11-30 | 2023-03-03 | 广东凯金新能源科技股份有限公司 | Detection equipment and detection method for carbon coating integrity of carbon-coated silicon-based material |
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