CN201762418U - Tungsten particles for fluxing agent - Google Patents
Tungsten particles for fluxing agent Download PDFInfo
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- CN201762418U CN201762418U CN2010205314661U CN201020531466U CN201762418U CN 201762418 U CN201762418 U CN 201762418U CN 2010205314661 U CN2010205314661 U CN 2010205314661U CN 201020531466 U CN201020531466 U CN 201020531466U CN 201762418 U CN201762418 U CN 201762418U
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- tungsten
- tungsten particle
- flux
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Abstract
The utility model provides sheet-shaped or block-shaped tungsten particles for a fluxing agent, which have better flux effect and appearance of rough surfaces under microscope. A plurality of grooves, faults or cracks are arranged on surfaces of tungsten particles; and the particle size is 20-40 meshes. The utility model has high release curve peak form and high strength under a low consumption and has high accuracy and precision of test result for carbon and sulfur element content of samples.
Description
Technical field
The utility model relates to a kind of flux, is applicable to non-ferrous metal, various alloy, and the carbon of ore, pottery, glass, refractory material etc., the analyzing and testing of element sulphur content.
Background technology
Non-ferrous metal, various alloy, and carbon, the element sulphur content of ore, pottery, glass, refractory material etc. mainly adopt the metallurgical analysis firing method, detect with Instrumental Analysis such as high frequency-infrared instrument. Be softening, fusing or the condensing temperature that reduces the previous materials sample, in order to effectively discharge carbon, element sulphur in the testing sample, usually adopt pure tungsten grain, pure iron bits, fine copper bits, a large amount of what use is the pure tungsten grain. Chinese patent " tungsten stannum fluxing agent and manufacture method thereof " (ZL92103294.4) also provides respectively tungsten stannum fluxing agent, ferro-tungsten fluxing agent and manufacture method thereof with " ferro-tungsten fluxing agent and manufacture method thereof ", although can satisfy the analyzing and testing requirement of some high-melting-point sample, but need through tungsten powder cold isostatic compaction, fragmentation sieve, mix with tin or abrasive grit batching, the technical process of the complexity such as high temperature sintering, need strict control briquetting pressure, particle size after cracking and sintering temperature etc., manufacturing cost is higher, therefore the still granular pure tungsten grains of at present a large amount of uses. Tungsten particle is being connected with under the environment of oxygen, and about 650 ° of C begin oxidation, discharge simultaneously the heat of 190 kcal/mol, forms a hot environment around testing sample, makes carbon in the sample, sulphur fully be combined with oxygen and discharge. But there is significantly hangover peak shape in release profiles during pure tungsten grain hydrotropy, and requires large usage quantity, and general consumption is lower than carbon in the 0.5g sample, element sulphur content measuring result fluctuation is larger about 1.5g, and test result is obviously on the low side when being lower than the consumption of 0.3g.
The utility model content
The utility model provides a kind of flux tungsten particle with new structure of the effect of better fluxing for above-mentioned deficiency, and not only consumption is few, and release profiles peak shape, intensity are high, and is good to the test result accuracy of sample carbon, element sulphur content, precision is high.
For achieving the above object, flux tungsten particle of the present utility model, its microstructure are shaggy sheet or bulk.
As improvement, the rough surface of sheet or block tungsten particle has some grooves, tomography or crackle。The tungsten particle granularity is preferably 20～40 orders.
Because adopting microstructure is shaggy sheet or block tungsten particle, good permeability between tungsten particle, particularly when the rough surface of sheet or block tungsten particle presents some grooves, tomography or crackle, the actual effect that between tungsten particle surface, tungsten particle, has formed guiding gutter, be more convenient for carbon, sulphur in the sample fully is combined with oxygen and is discharged, so better effects if of fluxing, and consumption is few, release profiles peak shape, intensity are high, and be good to the test result accuracy of sample carbon, element sulphur content, precision is high.
Description of drawings
Fig. 1 is flux tungsten particle micro-structure diagram of the present utility model (X35).
Fig. 2 is the structural representation of single tungsten particle 11 among Fig. 1, and its surface presents some grooves (X100).
Fig. 3 is the structural representation of another single tungsten particle 12 among Fig. 1, and its surface presents some tomographies (X100).
Fig. 4 is the structural representation of another single tungsten particle 13 among Fig. 1, and its surface presents some crackles (X100).
Fig. 5 is the micro-structure diagram (X25) of flux tungsten particle in the prior art.
Fig. 6 is the release profiles of flux tungsten particle of the present utility model.
Fig. 7 is the release profiles of flux tungsten particle in the prior art.
The specific embodiment
Below in conjunction with accompanying drawing, flux tungsten particle of the present utility model is described further. As shown in Figure 1, flux tungsten particle of the present utility model amplifies 35 times at microscopically, is rendered as shaggy sheet or bulk, and granularity is preferably 20 orders～40 orders; The rough surface of the individual particle that has presents some grooves 11, and Fig. 2 is the schematic diagram of the structure of single tungsten particle 11 when amplifying 100 times, clearly shows groove 11 among the figure; What have exists some tomographies 12, and Fig. 3 is the schematic diagram of the structure of another single tungsten particle 12 when amplifying 100 times, clearly shows tomography 12 among the figure; What have then exists some crackles 13, and Fig. 4 is the schematic diagrames of another single tungsten particle 13 structures when amplifying 100 times, clearly shows crackle 13 among the figure.
Compare graininess flux tungsten particle of the prior art shown in Figure 5, shaggy sheet or block tungsten particle, good permeability between its tungsten particle, particularly when the rough surface of sheet or block tungsten particle presents some grooves, tomography or crackle, the actual effect that between tungsten particle surface, tungsten particle, has formed guiding gutter, be more convenient for carbon, sulphur in the sample fully is combined with oxygen and is discharged, so better effects if of fluxing, and consumption is few, release profiles peak shape, intensity are high, and be good to the test result accuracy of sample carbon, element sulphur content, precision is high.
When table 1 has clearly illustrated that in measuring the niobium sample carbon content, flux of the present utility model not only consumption is few, and the test result of the test result when consumption only has 0.15g during still with consumption 0.8g is consistent, test result is basically identical during also with the flux consumption 0.8 of prior art, and the test result accuracy is good, precision is high; And that the flux consumption of prior art is lower than 0.5g test result fluctuation is larger, and test result is obviously on the low side when being lower than the consumption of 0.3g.
The release profiles of comparing flux tungsten particle in the prior art of Fig. 7 obviously trails, and Fig. 6 is the release profiles of flux tungsten particle of the present utility model, and its peak type is intact and intensity is high, shows that it has good gas permeability and reaction speed.
The preparation of flux tungsten particle of the present utility model, can adopt the smear metal of the tungsten product that purity meets the demands, be tungsten in the product 〉=99.9%, carbon≤0.0010%, sulphur≤0.0005%, such as products such as tungsten crucible, tungsten bar, tungsten plates, it is carried out car, mills, digs, grinds or other process resulting smear metal, and fragmentation is sieved, and can obtain, method is simple, and is with low cost. The fragmentation granularity effect when 20 orders～40 order of sieving is better.
Table 1: the flux tungsten particle consumption when measuring carbon content in the niobium sample and ratio of precision are
 |
0.8 | 0.5 | 0.3 | 0.15 |
| Prior art flux tungsten particle | 0.311% | 0.303% | 0.312% | 0.249% |
| The utility model flux tungsten particle | 0.310% | 0.316% | 0.308% | 0.305% |
The preparation of flux tungsten particle of the present utility model, can adopt the smear metal of the tungsten product that purity meets the demands, be tungsten in the product 〉=99.9%, carbon≤0.0010%, sulphur≤0.0005%, such as products such as tungsten crucible, tungsten bar, tungsten plates, it is carried out car, mills, digs, grinds or other process resulting smear metal, and fragmentation is sieved, and can obtain, method is simple, and is with low cost. The fragmentation granularity effect when 20 orders～40 order of sieving is better.
As shown in Figure 1, the flux tungsten particle that said method obtains is shaggy, irregular sheet or bulk, can certainly be shaggy, regular sheet or bulk, or groove, tomography or the crackle of rule, is that such preparation cost is higher. But so long as shaggy sheet or block flux tungsten particle just belong to the scope that the utility model is protected.
Claims (3)
1. tungsten particles for fluxing agent, it is characterized in that: described tungsten particle microstructure is shaggy sheet or bulk.
2. tungsten particles for fluxing agent as claimed in claim 1, it is characterized in that: the rough surface of described sheet or block tungsten particle has some grooves, tomography or crackle。
3. tungsten particles for fluxing agent as claimed in claim 1, it is characterized in that: the granularity of described tungsten particle is 20～40 orders.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205314661U CN201762418U (en) | 2010-09-16 | 2010-09-16 | Tungsten particles for fluxing agent |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205314661U CN201762418U (en) | 2010-09-16 | 2010-09-16 | Tungsten particles for fluxing agent |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201762418U true CN201762418U (en) | 2011-03-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010205314661U Expired - Lifetime CN201762418U (en) | 2010-09-16 | 2010-09-16 | Tungsten particles for fluxing agent |
Country Status (1)
| Country | Link |
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| CN (1) | CN201762418U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105806797A (en) * | 2014-12-30 | 2016-07-27 | 中核北方核燃料元件有限公司 | Method for determining contents of carbon and sulfur in thorium dioxide |
-
2010
- 2010-09-16 CN CN2010205314661U patent/CN201762418U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105806797A (en) * | 2014-12-30 | 2016-07-27 | 中核北方核燃料元件有限公司 | Method for determining contents of carbon and sulfur in thorium dioxide |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110316 |
|
| CX01 | Expiry of patent term |