CN103303979A - Tungsten oxide (WO3) nanopowder prepared by pyrolysing method - Google Patents
Tungsten oxide (WO3) nanopowder prepared by pyrolysing method Download PDFInfo
- Publication number
- CN103303979A CN103303979A CN2013102528686A CN201310252868A CN103303979A CN 103303979 A CN103303979 A CN 103303979A CN 2013102528686 A CN2013102528686 A CN 2013102528686A CN 201310252868 A CN201310252868 A CN 201310252868A CN 103303979 A CN103303979 A CN 103303979A
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- CN
- China
- Prior art keywords
- apt
- citric acid
- ammonium paratungstate
- tungsten oxide
- add
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Links
- 238000000034 method Methods 0.000 title claims description 13
- 239000011858 nanopowder Substances 0.000 title abstract 2
- ZNOKGRXACCSDPY-UHFFFAOYSA-N tungsten trioxide Chemical compound O=[W](=O)=O ZNOKGRXACCSDPY-UHFFFAOYSA-N 0.000 title abstract 2
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 claims abstract description 78
- XAYGUHUYDMLJJV-UHFFFAOYSA-Z decaazanium;dioxido(dioxo)tungsten;hydron;trioxotungsten Chemical compound [H+].[H+].[NH4+].[NH4+].[NH4+].[NH4+].[NH4+].[NH4+].[NH4+].[NH4+].[NH4+].[NH4+].O=[W](=O)=O.O=[W](=O)=O.O=[W](=O)=O.O=[W](=O)=O.O=[W](=O)=O.O=[W](=O)=O.[O-][W]([O-])(=O)=O.[O-][W]([O-])(=O)=O.[O-][W]([O-])(=O)=O.[O-][W]([O-])(=O)=O.[O-][W]([O-])(=O)=O.[O-][W]([O-])(=O)=O XAYGUHUYDMLJJV-UHFFFAOYSA-Z 0.000 claims abstract description 50
- 239000000843 powder Substances 0.000 claims abstract description 23
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 14
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 14
- 239000001301 oxygen Substances 0.000 claims abstract description 14
- 239000002994 raw material Substances 0.000 claims abstract description 10
- 238000007669 thermal treatment Methods 0.000 claims abstract description 7
- 238000006243 chemical reaction Methods 0.000 claims description 26
- QGLKJKCYBOYXKC-UHFFFAOYSA-N nonaoxidotritungsten Chemical compound O=[W]1(=O)O[W](=O)(=O)O[W](=O)(=O)O1 QGLKJKCYBOYXKC-UHFFFAOYSA-N 0.000 claims description 26
- 229910001930 tungsten oxide Inorganic materials 0.000 claims description 26
- 238000003756 stirring Methods 0.000 claims description 25
- 238000000197 pyrolysis Methods 0.000 claims description 11
- 238000001035 drying Methods 0.000 claims description 10
- 235000011114 ammonium hydroxide Nutrition 0.000 claims description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- 239000012153 distilled water Substances 0.000 claims description 5
- 238000001704 evaporation Methods 0.000 claims description 5
- 230000008020 evaporation Effects 0.000 claims description 5
- 238000000227 grinding Methods 0.000 claims description 5
- 239000002245 particle Substances 0.000 claims description 2
- 239000011164 primary particle Substances 0.000 claims description 2
- 238000002360 preparation method Methods 0.000 abstract description 13
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 abstract 2
- 229910021529 ammonia Inorganic materials 0.000 abstract 1
- 239000000203 mixture Substances 0.000 abstract 1
- 239000002243 precursor Substances 0.000 abstract 1
- 239000000047 product Substances 0.000 description 5
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 3
- 229910052721 tungsten Inorganic materials 0.000 description 3
- 239000010937 tungsten Substances 0.000 description 3
- 239000002253 acid Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000012808 vapor phase Substances 0.000 description 2
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 238000001354 calcination Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 239000013067 intermediate product Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005979 thermal decomposition reaction Methods 0.000 description 1
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- Manufacture Of Metal Powder And Suspensions Thereof (AREA)
- Inorganic Compounds Of Heavy Metals (AREA)
Abstract
The invention relates to nanoscale tungsten oxide (WO3) powder and a pyrolysing preparation method thereof, wherein an optimized raw material composition consisting of ammonium paratungstate (APT), citric acid and ammonia in corresponding proportion is adopted, the molar ratio of APT and citric acid is 1.5, and parameters of a preparation process matched are used. The flow of oxygen based on per gram of precursor is 55ml/min, and the thermal treatment temperature is 520 DEG C, so that WO3 nanopowder with uniformly distributed grain size is obtained.
Description
Technical field
The present invention relates to a kind of Tungsten oxide 99.999 (WO
3) and preparation method thereof, the Tungsten oxide 99.999 (WO of a kind of pyrolysis method preparation particularly
3) nanometer powder.
Background technology
Tungsten oxide 99.999 (WO
3) be the yellow-green colour powder, be a kind of important oxide compound of tungsten, mainly for the manufacture of W powder and WC powder, namely tungsten bar, tungsten filament and Wimet etc. are Tungsten oxide 99.999 (WO at present
3) main terminal object.
Tungsten oxide 99.999 (WO now
3) the preparation method mainly be the calcining pyrolysis method, wherein the raw material of pyrolysis then is mainly concerned with ammonium paratungstate (APT) and wolframic acid (H
2WO
4), corresponding thermal decomposition type is respectively:
5(NH
4)
2O·12WO
3·5H
2O＝12WO
3+10NH
3+10H
2O (1)，
H
2WO
4＝WO
3+H2O (2)，
Yet the Tungsten oxide 99.999 (WO that above-mentioned pyrolysis method makes
3) granularity is thicker, the product granularity that obtains of APT raw material is at 10-20 μ m usually, and the product granularity that the wolframic acid raw material obtains is at 3-10 μ m.And in order to obtain chemically reactive higher in the following process process, with to the better promoter action of the alloy of some particular requirements, often require Tungsten oxide 99.999 (WO
3) have thinner granularity and a larger specific surface area, this is so that the prepared Tungsten oxide 99.999 (WO of traditional pyrolysis method
3) more and more being difficult to satisfy must demand on the granularity.People have begun with research steering other Tungsten oxide 99.999 (WO
3) preparation method, vapor phase process for example, however although vapor phase process etc. can obtain the Tungsten oxide 99.999 (WO of more meticulous for example tens of nm
3) powder, but its preparation cost significantly rises than pyrolysis method, and industrialized scale also is difficult to meet the demands.
For this reason, improve pyrolysis method and produce Tungsten oxide 99.999 (WO
3) fine degree, thereby obtain a kind ofly can satisfy granularity requirements, also can adapt to the cost-effective Tungsten oxide 99.999 (WO of output needs
3) production method and corresponding product, become the technical problem that needs to be resolved hurrily.
Summary of the invention
Purpose of the present invention namely is to provide a kind of can prepare nano level Tungsten oxide 99.999 (WO
3) the pyrolysis preparation method of powder and the Tungsten oxide 99.999 (WO that makes thereof
3) powder.
For achieving the above object, the technical solution used in the present invention is:
A kind of Tungsten oxide 99.999 (WO
3) nanometer powder and pyrolysis preparation method thereof, described powder makes by following steps:
At first, select granularity approximately the high-purity ammonium paratungstate of 5 μ m (APT) in reaction vessel, add distilled water as reaction raw materials, and adopt magnetic stirrer to stir, add while stirring citric acid solution;
The second, wait for that citric acid solution all dissolves and mixes after, in reaction vessel, add high-purity ammonium paratungstate (APT) while stirring;
The 3rd, high-purity ammonium paratungstate (APT) adds complete rear adding ammoniacal liquor, and stirring obtains reaction soln;
The 4th, place container for evaporation concentrated described reaction soln, the concentrated concentrated solution that obtains carries out drying and obtains presoma under 150-160 ℃ in drying plant;
The 5th, presoma is pulverized in grinding plant, put into subsequently the crucible that is connected with oxygen and heat-treat, finally obtain Tungsten oxide 99.999 (WO
3) nanometer powder;
The purity of wherein said high-purity ammonium paratungstate (APT) is greater than 99.9wt%, and the add-on of described citric acid solution is calculated as 1-3 take ammonium paratungstate (APT) and the mol ratio of citric acid; The concentration of described ammoniacal liquor is 30%; Described stirring velocity is 180-200r/min; During described thermal treatment, the flow that calculates oxygen take every g presoma is as 50-60ml/min, and temperature is 500-520 ℃, and the time is 1.2-1.5h.
Preferably, the add-on of described citric acid solution is calculated as 1.5 take the mol ratio of ammonium paratungstate (APT) and citric acid, and the described flow that calculates oxygen take every g presoma is as 55ml/min, and described thermal treatment temp is 520 ℃.
Advantage of the present invention is: adopted preferred raw material to form and corresponding proportioning, mainly be selecting of ammonium paratungstate (APT) and citric acid, and the two suitable proportioning, and preparation technology parameter with matching, mainly be flow and the thermal treatment temp of oxygen, obtained the equally distributed Tungsten oxide 99.999 (WO of particle diameter
3) nanometer powder.
Description of drawings
Fig. 1 is the Tungsten oxide 99.999 (WO that the present invention obtains
3) the SEM photo of nanometer powder.
Embodiment
Below, the present invention is described in detail by specific embodiment 1-3.
Embodiment 1.
At first, select granularity approximately the purity of 5 μ m greater than the ammonium paratungstate (APT) of 99.9wt% as reaction raw materials, in reaction vessel, add distilled water, and adopt magnetic stirrer to stir, stirring velocity is 180-200r/min, adds while stirring citric acid solution;
The second, wait for that citric acid solution all dissolves and mixes after, in reaction vessel, add high-purity ammonium paratungstate (APT) while stirring, it is 3 that final ammonium paratungstate (APT) calculates with the mol ratio of citric acid;
The 3rd, the complete rear adding concentration of high-purity ammonium paratungstate (APT) adding is 30% ammoniacal liquor, and stirring obtains reaction soln;
The 4th, place container for evaporation concentrated described reaction soln, the concentrated concentrated solution that obtains carries out drying and obtains presoma under 150-160 ℃ in drying plant;
The 5th, presoma is pulverized in grinding plant, put into subsequently and be connected with the flow that calculates oxygen take every g presoma and heat-treat in 510 ℃ as the crucible of 60ml/min oxygen, finally obtain Tungsten oxide 99.999 (WO
3) nanometer powder.
Embodiment 2.
At first, select granularity approximately the purity of 5 μ m greater than the ammonium paratungstate (APT) of 99.9wt% as reaction raw materials, in reaction vessel, add distilled water, and adopt magnetic stirrer to stir, stirring velocity is 180-200r/min, adds while stirring citric acid solution;
The second, wait for that citric acid solution all dissolves and mixes after, in reaction vessel, add high-purity ammonium paratungstate (APT) while stirring, it is 1.5 that final ammonium paratungstate (APT) calculates with the mol ratio of citric acid;
The 3rd, the complete rear adding concentration of high-purity ammonium paratungstate (APT) adding is 30% ammoniacal liquor, and stirring obtains reaction soln;
The 4th, place container for evaporation concentrated described reaction soln, the concentrated concentrated solution that obtains carries out drying and obtains presoma under 150-160 ℃ in drying plant;
The 5th, presoma is pulverized in grinding plant, put into subsequently and be connected with the flow that calculates oxygen take every g presoma and heat-treat in 520 ℃ as the crucible of 55ml/min oxygen, finally obtain Tungsten oxide 99.999 (WO
3) nanometer powder.
Embodiment 3.
At first, select granularity approximately the purity of 5 μ m greater than the ammonium paratungstate (APT) of 99.9wt% as reaction raw materials, in reaction vessel, add distilled water, and adopt magnetic stirrer to stir, stirring velocity is 180-200r/min, adds while stirring citric acid solution;
The second, wait for that citric acid solution all dissolves and mixes after, in reaction vessel, add high-purity ammonium paratungstate (APT) while stirring, it is 1 that final ammonium paratungstate (APT) calculates with the mol ratio of citric acid;
The 3rd, the complete rear adding concentration of high-purity ammonium paratungstate (APT) adding is 30% ammoniacal liquor, and stirring obtains reaction soln;
The 4th, place container for evaporation concentrated described reaction soln, the concentrated concentrated solution that obtains carries out drying and obtains presoma under 150-160 ℃ in drying plant;
The 5th, presoma is pulverized in grinding plant, put into subsequently and be connected with the flow that calculates oxygen take every g presoma and heat-treat in 500 ℃ as the crucible of 50ml/min oxygen, finally obtain Tungsten oxide 99.999 (WO
3) nanometer powder.
The product that obtains after the embodiment 1-3 reaction confirms to be Tungsten oxide 99.999 (WO through the test of XRD diffraction
3); Fig. 1 is the SEM photo result of embodiment 2, can find out, the application preparation method obtains Tungsten oxide 99.999 (WO
3) nanometer powder has the approximately size of 20-50nm, and be primary particle substantially; In embodiment 1, because the ratio of citric acid is slightly low, the effect of its crystal grain thinning is abundant not, the offspring that a certain amount of cohesion forms has appearred, and in embodiment 3, because the citric acid ratio is higher, it is abundant that thermal treatment is also owed, C in the product, N content are high, and remaining certain organism also has a small amount of undecomposed ATB intermediate product.
Result above comprehensive as can be known, the material rate among the embodiment 2 and processing parameter have obtained best preparation effect.
Claims (3)
1. Tungsten oxide 99.999 (WO that pyrolysis method makes
3) nanometer powder, it is characterized in that: make by following steps:
At first, select granularity approximately the high-purity ammonium paratungstate of 5 μ m (APT) in reaction vessel, add distilled water as reaction raw materials, and adopt magnetic stirrer to stir, add while stirring citric acid solution;
The second, wait for that citric acid solution all dissolves and mixes after, in reaction vessel, add high-purity ammonium paratungstate (APT) while stirring;
The 3rd, high-purity ammonium paratungstate (APT) adds complete rear adding ammoniacal liquor, and stirring obtains reaction soln;
The 4th, place container for evaporation concentrated described reaction soln, the concentrated concentrated solution that obtains carries out drying and obtains presoma under 150-160 ℃ in drying plant;
The 5th, presoma is pulverized in grinding plant, put into subsequently the crucible that is connected with oxygen and heat-treat, finally obtain Tungsten oxide 99.999 (WO
3) nanometer powder;
The purity of wherein said high-purity ammonium paratungstate (APT) is greater than 99.9wt%, and the add-on of described citric acid solution is calculated as 1-3 take ammonium paratungstate (APT) and the mol ratio of citric acid; The concentration of described ammoniacal liquor is 30%; Described stirring velocity is 180-200r/min; During described thermal treatment, the flow that calculates oxygen take every g presoma is as 50-60ml/min, and temperature is 500-520 ℃, and the time is 1.2-1.5h.
2. nanometer powder according to claim 1, it is characterized in that: the add-on of described citric acid solution is calculated as 1.5 take ammonium paratungstate (APT) and the mol ratio of citric acid, and the described flow that calculates oxygen take every g presoma is as 55ml/min, and described thermal treatment temp is 520 ℃.
3. nanometer powder according to claim 1, it is characterized in that: the particle diameter of described powder is about 20-50nm, and substantially is primary particle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310252868.6A CN103303979B (en) | 2013-06-24 | 2013-06-24 | Tungsten oxide (WO3) nanopowder prepared by pyrolysing method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310252868.6A CN103303979B (en) | 2013-06-24 | 2013-06-24 | Tungsten oxide (WO3) nanopowder prepared by pyrolysing method |
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| CN103303979B CN103303979B (en) | 2015-07-22 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110563043A (en) * | 2019-09-29 | 2019-12-13 | 上海交通大学 | method for preparing carbon film coated tungsten oxide nanospheres in one step by hydrothermal method and application thereof |
| CN113912125A (en) * | 2021-11-05 | 2022-01-11 | 赣州海盛钨钼集团有限公司 | Calcination process for preparing yellow tungsten oxide with high specific surface area and low residual ammonia |
| US11292723B2 (en) | 2016-09-15 | 2022-04-05 | H.C. Starck Tungsten Gmbh | Tungsten carbide powder and production thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101381106A (en) * | 2007-09-05 | 2009-03-11 | 西南交通大学 | Method for preparing nano tungsten trioxide powder |
| CN101407339A (en) * | 2007-10-12 | 2009-04-15 | 新疆大学 | Method for synthesizing quadrangle tungsten oxide nano-powder |
| CN102485380A (en) * | 2010-12-06 | 2012-06-06 | 北京有色金属研究总院 | Preparation method of submicron nearly spherical tungsten powder |
-
2013
- 2013-06-24 CN CN201310252868.6A patent/CN103303979B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101381106A (en) * | 2007-09-05 | 2009-03-11 | 西南交通大学 | Method for preparing nano tungsten trioxide powder |
| CN101407339A (en) * | 2007-10-12 | 2009-04-15 | 新疆大学 | Method for synthesizing quadrangle tungsten oxide nano-powder |
| CN102485380A (en) * | 2010-12-06 | 2012-06-06 | 北京有色金属研究总院 | Preparation method of submicron nearly spherical tungsten powder |
Non-Patent Citations (1)
| Title |
|---|
| 莫若飞 等: ""用柠檬酸作调控剂水热合成正交相三氧化钨"", 《无机化学学报》, no. 9, 30 September 2007 (2007-09-30), pages 1615 - 1620 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11292723B2 (en) | 2016-09-15 | 2022-04-05 | H.C. Starck Tungsten Gmbh | Tungsten carbide powder and production thereof |
| CN110563043A (en) * | 2019-09-29 | 2019-12-13 | 上海交通大学 | method for preparing carbon film coated tungsten oxide nanospheres in one step by hydrothermal method and application thereof |
| CN113912125A (en) * | 2021-11-05 | 2022-01-11 | 赣州海盛钨钼集团有限公司 | Calcination process for preparing yellow tungsten oxide with high specific surface area and low residual ammonia |
| CN113912125B (en) * | 2021-11-05 | 2023-08-04 | 赣州海盛钨业股份有限公司 | Calcination process for preparing high specific surface area low residual ammonia yellow tungsten oxide |
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|---|---|
| CN103303979B (en) | 2015-07-22 |
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Effective date of registration: 20150612 Address after: Yinzhou District Lianfeng road 315175 Zhejiang city of Ningbo Province, No. 886 Applicant after: Zhu Lanying Address before: 315100, No. 50, Heng Dong Road, Heng Gang Town, Yinzhou District, Zhejiang, Ningbo Applicant before: Liu Yajing |
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