CN109371447A - A kind of barium ferrite electrophoresis suspensioning liquid and its preparation method and application - Google Patents
A kind of barium ferrite electrophoresis suspensioning liquid and its preparation method and application Download PDFInfo
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- CN109371447A CN109371447A CN201811374727.0A CN201811374727A CN109371447A CN 109371447 A CN109371447 A CN 109371447A CN 201811374727 A CN201811374727 A CN 201811374727A CN 109371447 A CN109371447 A CN 109371447A
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- barium ferrite
- suspensioning liquid
- electrophoresis suspensioning
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- powder
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- 239000007788 liquid Substances 0.000 title claims abstract description 45
- 238000001962 electrophoresis Methods 0.000 title claims abstract description 44
- AJCDFVKYMIUXCR-UHFFFAOYSA-N oxobarium;oxo(oxoferriooxy)iron Chemical compound [Ba]=O.O=[Fe]O[Fe]=O.O=[Fe]O[Fe]=O.O=[Fe]O[Fe]=O.O=[Fe]O[Fe]=O.O=[Fe]O[Fe]=O.O=[Fe]O[Fe]=O AJCDFVKYMIUXCR-UHFFFAOYSA-N 0.000 title claims abstract description 25
- 238000002360 preparation method Methods 0.000 title claims abstract description 25
- 239000000843 powder Substances 0.000 claims abstract description 33
- 239000006185 dispersion Substances 0.000 claims abstract description 4
- YRKCREAYFQTBPV-UHFFFAOYSA-N acetylacetone Chemical compound CC(=O)CC(C)=O YRKCREAYFQTBPV-UHFFFAOYSA-N 0.000 claims description 56
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 29
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 claims description 20
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 15
- 235000019441 ethanol Nutrition 0.000 claims description 15
- 239000004359 castor oil Substances 0.000 claims description 14
- 235000019438 castor oil Nutrition 0.000 claims description 14
- ZEMPKEQAKRGZGQ-XOQCFJPHSA-N glycerol triricinoleate Natural products CCCCCC[C@@H](O)CC=CCCCCCCCC(=O)OC[C@@H](COC(=O)CCCCCCCC=CC[C@@H](O)CCCCCC)OC(=O)CCCCCCCC=CC[C@H](O)CCCCCC ZEMPKEQAKRGZGQ-XOQCFJPHSA-N 0.000 claims description 14
- 239000002904 solvent Substances 0.000 claims description 13
- 229960000583 acetic acid Drugs 0.000 claims description 10
- 239000012362 glacial acetic acid Substances 0.000 claims description 10
- 238000010907 mechanical stirring Methods 0.000 claims description 10
- 230000010355 oscillation Effects 0.000 claims description 10
- 230000001376 precipitating effect Effects 0.000 claims description 9
- 239000000725 suspension Substances 0.000 claims description 6
- 229910021578 Iron(III) chloride Inorganic materials 0.000 claims description 5
- 229910001626 barium chloride Inorganic materials 0.000 claims description 5
- 238000000975 co-precipitation Methods 0.000 claims description 5
- 239000008367 deionised water Substances 0.000 claims description 5
- 229910021641 deionized water Inorganic materials 0.000 claims description 5
- 238000010438 heat treatment Methods 0.000 claims description 5
- 239000007790 solid phase Substances 0.000 claims description 5
- 239000000126 substance Substances 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 5
- 239000000758 substrate Substances 0.000 claims description 3
- 238000004458 analytical method Methods 0.000 claims description 2
- 239000003795 chemical substances by application Substances 0.000 claims description 2
- 230000005611 electricity Effects 0.000 claims description 2
- 239000002344 surface layer Substances 0.000 claims description 2
- CSCPPACGZOOCGX-UHFFFAOYSA-N acetone Substances CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims 1
- -1 acyl acetone Chemical compound 0.000 claims 1
- 125000005909 ethyl alcohol group Chemical group 0.000 claims 1
- 239000002244 precipitate Substances 0.000 claims 1
- 230000009182 swimming Effects 0.000 claims 1
- 238000005406 washing Methods 0.000 claims 1
- 230000029087 digestion Effects 0.000 abstract description 6
- 230000015572 biosynthetic process Effects 0.000 abstract 1
- 238000003786 synthesis reaction Methods 0.000 abstract 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 26
- 229960001777 castor oil Drugs 0.000 description 11
- 239000002245 particle Substances 0.000 description 9
- 229910002771 BaFe12O19 Inorganic materials 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 238000011068 loading method Methods 0.000 description 4
- 239000012071 phase Substances 0.000 description 4
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000005684 electric field Effects 0.000 description 2
- 238000001652 electrophoretic deposition Methods 0.000 description 2
- 239000008187 granular material Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 240000002853 Nelumbo nucifera Species 0.000 description 1
- 235000006508 Nelumbo nucifera Nutrition 0.000 description 1
- 235000006510 Nelumbo pentapetala Nutrition 0.000 description 1
- 240000000528 Ricinus communis Species 0.000 description 1
- 235000004443 Ricinus communis Nutrition 0.000 description 1
- YADLKQDEUNZTLC-UHFFFAOYSA-N [Fe].[Ba] Chemical compound [Fe].[Ba] YADLKQDEUNZTLC-UHFFFAOYSA-N 0.000 description 1
- 239000011247 coating layer Substances 0.000 description 1
- 239000000084 colloidal system Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000010773 plant oil Substances 0.000 description 1
- 239000006228 supernatant Substances 0.000 description 1
- 238000000733 zeta-potential measurement Methods 0.000 description 1
- 229910000859 α-Fe Inorganic materials 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D13/00—Electrophoretic coating characterised by the process
- C25D13/02—Electrophoretic coating characterised by the process with inorganic material
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/02—Investigating particle size or size distribution
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- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Dispersion Chemistry (AREA)
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Electrochromic Elements, Electrophoresis, Or Variable Reflection Or Absorption Elements (AREA)
- Compounds Of Iron (AREA)
Abstract
The invention discloses a kind of barium ferrite electrophoresis suspensioning liquid and its preparation method and application, the barium ferrite electrophoresis suspensioning liquid specifically includes BaxFe13‑xO19, wherein 0.5≤x≤1.The barium ferrite electrophoresis suspensioning liquid is made through two steps, including BaxFe13‑xO19The synthesis of powder and BaxFe13‑xO19The dispersion of powder suspends.The barium ferrite electrophoresis suspensioning liquid that the present invention prepares volume has positive charge, disperses thorough, digestion time length, zeta current potential > 35mV, and stability is high, and preparation process is simple, at low cost.
Description
Technical field
The invention belongs to colloid chemistry and electrophoretic techniques fields, are related to electrophoretic deposition coating technology, and in particular to a kind of barium
Ferrite electrophoresis suspensioning liquid and its preparation method and application.
Background technique
Electrophoretic deposition is a kind of material coating technology of preparing of extensive application, and principle is in the outstanding of particle charge lotus
It is passed through electric field in supernatant liquid, charged particle polar movement and deposits on the electrode round about under electric field action, is formed uniform
Film layer, thickness can be in the range of 0.2 μm~200 μm.Its advantage has that coating layer thickness is controllable, stoichiometric ratio is accurate, equipment
Simply, it is not limited by substrate shape.The characteristic of electrophoresis suspensioning liquid, such as stability are the key factors for determining coating performance.Cause
The high electrophoresis suspensioning liquid of this preparation stability is particularly critical.
BaxFe13-xO19It is a kind of Ferrite Material, has huge application inhaling the fields such as wave, perpendicular magnetic recording, but arrive mesh
Before until be not yet applied to electrophoresis suspensioning liquid.
Summary of the invention
The technical issues of solution: the purpose of the invention is to overcome the deficiencies of existing technologies, it is high to obtain a kind of stability
Electrophoresis suspensioning liquid, and develop a kind of by BaxFe13-xO19Method as electrophoresis suspensioning liquid, the present invention provides a kind of barium iron
Oxysome electrophoresis suspensioning liquid and its preparation method and application.
Technical solution: in order to achieve the above objectives, the technical solution adopted by the present invention is that:
A kind of barium ferrite electrophoresis suspensioning liquid, the electrophoresis suspensioning liquid specifically include BaxFe13-xO19, wherein 0.5≤x≤
1。
The BaxFe13-xO19The mass fraction range that solid phase accounts for electrophoresis suspensioning liquid is 1~15%.
A kind of preparation method of barium ferrite electrophoresis suspensioning liquid comprising the steps of:
Step 1, chemical coprecipitation synthesize BaxFe13-xO19Powder, the powder be laminated structure, thickness 10nm~50nm,
0.3 μm~2 μm of diameter；
Step 2 uses ethyl alcohol/acetylacetone,2,4-pentanedione for solvent, under the conditions of 5~45 DEG C, by BaxFe13-xO19Powder is scattered in
In the solvent, castor oil is added, and pH value is adjusted to 4~6 by glacial acetic acid, cooperative mechanical stirring and sonic oscillation dispersion are equal
It is even.
Wherein, BaxFe13-xO19The specific preparation step of powder are as follows: by FeCl3And BaCl2It is added in deionized water, is added dropwise
NaOH generates precipitating, and precipitating washed, dry, 750~1000 DEG C of heat treatments can be prepared by.
The BaxFe13-xO19Powder has a regular uniform pattern, no miscellaneous phase, without being adhered between particle.
It is further preferred that the ethyl alcohol/acetylacetone,2,4-pentanedione solvent volume ratio range is 1:1~3:1.
It is further preferred that the mass percent range that the castor oil accounts for suspension is 0.1~2%.
It is further preferred that Loading sequence described in step 2 is ethyl alcohol/acetylacetone,2,4-pentanedione, BaxFe13-xO19Powder, castor-oil plant
Oil, glacial acetic acid.
It is further preferred that mechanical stirring time described in step 2 is 10~30min, the sonic oscillation time is 20
~50min.
Barium ferrite electrophoresis suspensioning liquid of the present invention is in substrate surface layer plated film and/or dispersion and grain to fine powder
Application in degree analysis.
The utility model has the advantages that
1, electrophoresis suspensioning liquid of the present invention is uniformly dispersed, and thorough, digestion time is long, and Zeta potential > 35mV；
2, electrophoresis suspensioning liquid stability of the present invention is high；
3, the method for the invention simple process, at low cost.
Detailed description of the invention
Fig. 1 is Examples 1 to 3 electrophoresis suspensioning liquid Zeta potential measurement figure；
Fig. 2 is Examples 1 to 3 electrophoresis suspensioning liquid digestion time measurement figure.
Specific embodiment
Following embodiment further illustrates the contents of the present invention, but should not be construed as limiting the invention.Without departing substantially from
In the case where spirit of that invention and essence, to modification made by the method for the present invention, step or condition and replaces, belong to the present invention
Range.Unless otherwise specified, the conventional means that technological means used in embodiment is well known to those skilled in the art.
Embodiment 1
A kind of barium ferrite electrophoresis suspensioning liquid, the electrophoresis suspensioning liquid include BaxFe13-xO19, wherein x=1.
The BaFe12O19The mass fraction range that solid phase accounts for electrophoresis suspensioning liquid is 1%.
A kind of preparation method of barium ferrite electrophoresis suspensioning liquid comprising the steps of:
Step 1, chemical coprecipitation synthesize BaxFe13-xO19Powder, powder are laminated structure, thickness 10nm, 0.3 μm of diameter；
Step 2 uses ethyl alcohol/acetylacetone,2,4-pentanedione for solvent, under the conditions of 5 DEG C, by BaFe12O19Powder is scattered in described molten
In agent, castor oil is added, and pH value is adjusted to 4 by glacial acetic acid, cooperative mechanical stirring and sonic oscillation are uniformly dispersed.
Wherein, the BaFe12O19The specific preparation step of powder are as follows: by FeCl3And BaCl212:1 mixing in molar ratio adds
Enter in deionized water, NaOH is added dropwise and generates precipitating, precipitating washed, dry, 750 DEG C of heat treatments can be prepared by.
The BaFe12O19Powder has a regular uniform pattern, no miscellaneous phase, without being adhered between particle.
The ethyl alcohol/acetylacetone,2,4-pentanedione solvent volume ratio is 3:1.
The mass percent that the castor oil accounts for suspension is 1%.
The Loading sequence of the step 2 is ethyl alcohol/acetylacetone,2,4-pentanedione, BaFe12O19Powder, castor oil, glacial acetic acid.
Mechanical stirring 30min, sonic oscillation 50min in the step 2.
After preparation, sealed package is stored refrigerated.
The present embodiment is the utility model has the advantages that BaFe12O19Particle is positively charged, monodisperse；As shown in figure 1 shown in S-1, zeta current potential
For 45mV；As shown in S-1 in Fig. 2, digestion time 40h.
Embodiment 2
A kind of barium ferrite electrophoresis suspensioning liquid, the electrophoresis suspensioning liquid specifically include BaxFe13-xO19, wherein x=0.8.
The Ba0.8Fe12.2O19The mass fraction range that solid phase accounts for electrophoresis suspensioning liquid is 8%.
A kind of preparation method of barium ferrite electrophoresis suspensioning liquid comprising the steps of:
Step 1, chemical coprecipitation synthesize BaxFe13-xO19Powder, powder are laminated structure, thickness 40nm, 1.6 μm of diameter；
Step 2 uses ethyl alcohol/acetylacetone,2,4-pentanedione for solvent, under the conditions of 30 DEG C, by Ba0.8Fe12.2O19Powder is scattered in
It states in solvent, castor oil is added, and pH value is adjusted to 5 by glacial acetic acid, cooperative mechanical stirring and sonic oscillation are uniformly dispersed.
Wherein, the Ba0.8Fe12.2O19The specific preparation step of powder are as follows: by FeCl3And BaCl261:4 is mixed in molar ratio
It closes and is added in deionized water, NaOH is added dropwise and generates precipitating, precipitating washed, dry, 950 DEG C of heat treatments can be prepared by.
The Ba0.8Fe12.2O19Powder is the spheric granules of regular morphology, no miscellaneous phase, without adhesion between particle.
The ethyl alcohol/acetylacetone,2,4-pentanedione solvent volume ratio is 2:1.
The mass percent that the castor oil accounts for suspension is 0.1%.
The Loading sequence of the step 2 is ethyl alcohol/acetylacetone,2,4-pentanedione, Ba0.8Fe12.2O19Powder, castor oil, glacial acetic acid.
Mechanical stirring 20min, sonic oscillation 20min in the step 2.
After preparation, sealed package is stored refrigerated.
The present embodiment is the utility model has the advantages that Ba0.8Fe12.2O19Particle is positively charged, monodisperse；As shown in figure 1 shown in S-2, zeta electricity
Position is 35mV；As shown in S-2 in Fig. 2, digestion time 30h.
Embodiment 3
A kind of barium ferrite electrophoresis suspensioning liquid, the electrophoresis suspensioning liquid specifically include BaxFe13-xO19, wherein x=0.5.
The Ba0.5Fe12.5O19The mass fraction range that solid phase accounts for electrophoresis suspensioning liquid is 15%.
A kind of preparation method of barium ferrite electrophoresis suspensioning liquid comprising the steps of:
Step 1, chemical coprecipitation synthesize BaxFe13-xO19Powder, powder are laminated structure, thickness 30nm, 1 μm of diameter；
Step 2 uses ethyl alcohol/acetylacetone,2,4-pentanedione for solvent, under the conditions of 45 DEG C, by Ba0.5Fe12.5O19Powder is scattered in
It states in solvent, castor oil is added, and pH value is adjusted to 6 by glacial acetic acid, cooperative mechanical stirring and sonic oscillation are uniformly dispersed.
Wherein, Ba0.5Fe12.5O19The specific preparation step of powder are as follows: by FeCl3And BaCl225:1 mixing in molar ratio adds
Enter in deionized water, NaOH is added dropwise and generates precipitating, precipitating washed, dry, 880 DEG C of heat treatments can be prepared by.
The Ba0.5Fe12.5O19Powder is the spheric granules of regular morphology, no miscellaneous phase, without adhesion between particle.
The ethyl alcohol/acetylacetone,2,4-pentanedione solvent volume ratio is 1:1.
The mass percent that the castor oil accounts for suspension is 2%.
The Loading sequence of the step 2 is ethyl alcohol/acetylacetone,2,4-pentanedione, Ba0.5Fe12.5O19Powder, castor oil, glacial acetic acid.
Mechanical stirring 10min, sonic oscillation 30min in the step 2.
After preparation, sealed package is stored refrigerated.
The present embodiment is the utility model has the advantages that Ba0.5Fe12.5O19 particle is positively charged, monodisperse；As shown in figure 1 shown in S-3,
Zeta current potential is 38mV；As shown in S-3 in Fig. 2, digestion time 32h.
Claims (9)
1. a kind of barium ferrite electrophoresis suspensioning liquid, which is characterized in that the electrophoresis suspensioning liquid includes BaxFe13-xO19, wherein 0.5≤
x≤1。
2. barium ferrite electrophoresis suspensioning liquid according to claim 1, which is characterized in that the BaxFe13-xO19Solid phase accounts for electricity
The mass fraction range of swimming suspension is 1~15%.
3. a kind of preparation method of barium ferrite electrophoresis suspensioning liquid according to claim 1 or 2, which is characterized in that include
Following steps:
Step 1, chemical coprecipitation synthesize BaxFe13-xO19Powder, powder are laminated structure, thickness 10nm~50nm, 0.3 μm of diameter
~2 μm；
Step 2 uses ethyl alcohol/acetylacetone,2,4-pentanedione for solvent, under the conditions of 5~45 DEG C, by BaxFe13-xO19Powder is scattered in described molten
In agent, castor oil is added, and pH value is adjusted to 4~6 by glacial acetic acid, cooperative mechanical stirring and sonic oscillation are uniformly dispersed.
4. the preparation method of barium ferrite electrophoresis suspensioning liquid according to claim 3, which is characterized in that the BaxFe13- xO19The specific preparation step of powder are as follows: by FeCl3And BaCl2It is added in deionized water, NaOH is added dropwise and generates precipitating, precipitates through washing
It washs, dry, 750~1000 DEG C of heat treatments can be prepared by.
5. the preparation method of barium ferrite electrophoresis suspensioning liquid according to claim 3, which is characterized in that the ethyl alcohol/second
The volume ratio range of acyl acetone solvent is 1:1~3:1.
6. the preparation method of barium ferrite electrophoresis suspensioning liquid according to claim 3, which is characterized in that the castor oil accounts for
The mass percent range of suspension is 0.1~2%.
7. the preparation method of barium ferrite electrophoresis suspensioning liquid according to claim 3, which is characterized in that the sample-adding of step 2
Sequence is ethyl alcohol/acetylacetone,2,4-pentanedione, BaxFe13-xO19Powder, castor oil, glacial acetic acid.
8. the preparation method of barium ferrite electrophoresis suspensioning liquid according to claim 3, which is characterized in that described in step 2
The mechanical stirring time is 10~30min, and the sonic oscillation time is 20~50min.
9. barium ferrite electrophoresis suspensioning liquid described in claim 1 in substrate surface layer plated film and/or to the dispersion of fine powder and
Application in grain size analysis.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811374727.0A CN109371447A (en) | 2018-11-19 | 2018-11-19 | A kind of barium ferrite electrophoresis suspensioning liquid and its preparation method and application |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811374727.0A CN109371447A (en) | 2018-11-19 | 2018-11-19 | A kind of barium ferrite electrophoresis suspensioning liquid and its preparation method and application |
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| CN109371447A true CN109371447A (en) | 2019-02-22 |
Family
ID=65389435
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| CN201811374727.0A Pending CN109371447A (en) | 2018-11-19 | 2018-11-19 | A kind of barium ferrite electrophoresis suspensioning liquid and its preparation method and application |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1058373A (en) * | 1990-07-23 | 1992-02-05 | 百乐万年笔株式会社 | Magnetophoretic display panel |
| CN102568744A (en) * | 2012-02-22 | 2012-07-11 | 南京航空航天大学 | Composite permanent magnetic film and preparation method thereof |
| CN102876288A (en) * | 2012-10-29 | 2013-01-16 | 哈尔滨工业大学 | Graphite/barium ferrite composite wave-absorbing material and preparation method thereof |
| CN107059095A (en) * | 2017-06-04 | 2017-08-18 | 吴龙秀 | A kind of compound electrophoresis suspensioning liquid and preparation method thereof |
| CN108221030A (en) * | 2016-12-13 | 2018-06-29 | 天津瑞赛可新材料科技有限公司 | A kind of preparation method of magnetism coating |
-
2018
- 2018-11-19 CN CN201811374727.0A patent/CN109371447A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1058373A (en) * | 1990-07-23 | 1992-02-05 | 百乐万年笔株式会社 | Magnetophoretic display panel |
| CN102568744A (en) * | 2012-02-22 | 2012-07-11 | 南京航空航天大学 | Composite permanent magnetic film and preparation method thereof |
| CN102876288A (en) * | 2012-10-29 | 2013-01-16 | 哈尔滨工业大学 | Graphite/barium ferrite composite wave-absorbing material and preparation method thereof |
| CN108221030A (en) * | 2016-12-13 | 2018-06-29 | 天津瑞赛可新材料科技有限公司 | A kind of preparation method of magnetism coating |
| CN107059095A (en) * | 2017-06-04 | 2017-08-18 | 吴龙秀 | A kind of compound electrophoresis suspensioning liquid and preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 韩长日 等: "《精细无机化学品制造技术》", 31 August 2008, 科技文献出版社 * |
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Application publication date: 20190222 |