CN101566553A - Computing method for specific surface area of foamed nickel - Google Patents
Computing method for specific surface area of foamed nickel Download PDFInfo
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- CN101566553A CN101566553A CNA2009101318792A CN200910131879A CN101566553A CN 101566553 A CN101566553 A CN 101566553A CN A2009101318792 A CNA2009101318792 A CN A2009101318792A CN 200910131879 A CN200910131879 A CN 200910131879A CN 101566553 A CN101566553 A CN 101566553A
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- specific surface
- surface area
- foamed nickel
- porosint
- computing method
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Abstract
The invention describes a method for indirectly computing specific surface area of a foamed nickel by an easily measured parameter of porous material, wherein the easily measured parameter of the porous material is pore ratio and pore diameter. The foundation of the method is to establish a mathematical relationship between the specific surface are of the foamed nickel and the pore ratio and diameter. Using the relationship combined with experimental data of two easily measured parameters, the specific surface area of a foamed nickel is computed.
Description
Technical field:
The present invention relates to the calculating of porosint specific surface area, relate in particular to the concrete computing method of specific surface area of foamed nickel.
Background technology:
Through-hole foamed metal is the porosint of a class excellent performance, its all many-sides ([1] Banhart J.Manufacture such as fluid separation filtration, fluid distribution, sound-deadening and noise-reducing, energy-absorbing damping, heat insulation back-fire relief, heat interchange, electrochemical process, catalytic reaction engineering and bioengineering that relate to of many uses, characterisation and application of cellular metals and metal foams.Progress in Materials Science, 2001,46:559-632; [2] Liu Peisheng. porosint draws opinion. Beijing: publishing house of Tsing-Hua University, 2004.).Nickel foam is typical typical through-hole foamed metal; its in Europe, the United States, in, all production of existing scale of ground such as day; a large amount of as high-efficiency battery electrode material, catalyst carrier material and some other electrochemical process electrode material, thus corresponding work efficiency improved greatly.In these application scenarios, all need to utilize the surface action of nickel foam hole, its usability depends on the structural form of pore surface and the size of porous body specific surface area consumingly.So this moment, the specific surface area index of nickel foam seemed particularly important, the usability that it directly affects porous body is the important parameter of whole porous member.Test for the porosint specific surface area, at present the main method of using have gas adsorption method (BET method), fluid penetrant method and mercury intrusion method etc. ([3] Liu Peisheng. the assay method of porosint specific surface area and pore appearance [J]. Rare Metals Materials and engineering, 2006,35 (S2): 25-29).In some cases, because the restriction of aspects such as method, equipment and material sampling brings very big inconvenience to surveying work, but energy measurement not then sometimes.For example, said method is difficult to excessive porous body in gaging hole crack (surpassing 1mm as pore-size) or the too small porous body of specific surface area, also is difficult to the too small porous body in gaging hole crack.Relative other parameters, these two in porosity and aperture always in the porosint than be easier to measure the parameter that maybe can measure ([4] Liu Peisheng, Ma Xiaoming. the porosint detection method. Beijing: metallurgical industry publishing house, 2005).Therefore, utilize these two in porosity and aperture to know that easily the parameter of easy survey asks the specific surface area of calculating nickel foam indirectly, just have good practical significance, but do not find the announcement of this work at present as yet.
Summary of the invention:
The object of the present invention is to provide a kind of porosint that utilizes easily to survey the method that parameter calculates specific surface area of foamed nickel, this computing method can be used for to the porous articles specific surface area can not or the direct occasion of test of inconvenience.
It is porosity and these two the most basic parameters of porosint of aperture that the porosint that the present invention mentions is easily surveyed parameter, and the porosint that the present invention is directed to is a nickel foam.
From general significance, the present invention proposes one and calculate the porosint method for specific area.For nickel foam, set up the number reason relation of a porous body specific surface area and porosity and these two parameters of aperture, the concrete pattern of this relation is as follows:
S in the formula
v(cm
2/ cm
3) be the specific surface area of porous body, d (mm) and θ (%) are respectively the average pore size and the porosity of porous body, K
SBe the material that depends on porous body and the material constant of preparation process condition, n is for characterizing the geometric factor of porous body pore texture form.
Utilize these two basic parameters that more easily predict of porosity and aperture of porosint, just can adopt the following formula approximate treatment to go out the specific surface area of nickel foam.
Description of drawings:
The nickel foam that Fig. 1 the inventive method is successfully calculated (by the electrodeposition technology preparation).
Embodiment:
Embodiment: adopt electrodeposition technology to prepare nickel foam.Its electrodeposition process is: cleaning porous organic matrix → conductionization processing → electronickelling → removal organic matrix and sintering thermal treatment.Wherein the organic matrix of porous uses the polyether series polyurethane sponge, the method that applies the carbon back conducting resinl is adopted in the conductionization processing, electronickelling is conventional electroplating technology, remove organic matrix and sintering thermal treatment and adopt directly sintering and pyrolysis organism step through in reducing atmosphere, reducing atmosphere is the decomposed ammonia body.Other process conditions remain unchanged, and only change electroplating time, draw the nickel foam goods (referring to Fig. 1) of different porositys.With gas (N
2) penetrant method tests its specific surface area and effective average pore size, test result the 2nd～4 row in 1 that sees the following form.
To the nickel foam data of this experiment, in above-mentioned formula, get n=-1.41 and K
S=128.2 (wherein concrete value is by relevant experimental data matches), the specific surface area calculated value of gained is listed in the footline in the table 1.
The specific surface area S of table 1 nickel foam
v
By the contrast of the corresponding data of above-mentioned porous articles specific surface area as can be seen, result of calculation and measurement result have obtained good consistent.The mean deviation of two class values is less than 1%, and deviation range is also only between-2.2%～+ 1.0%.
Electrodeposition technology is a kind of maturation of preparation through-hole foamed metal material and successful method, and this process is widely used, and the product of producing is the good tridimensional network of pore connectivity, and its pore morpholohy comes from the original pore morpholohy of organic matrix.From the aforementioned calculation situation as can be known, the inventive method has been fit to the metal polyporous material of electro-deposition type well.
Porosity and aperture are two parameters the most basic of porosint, also are two parameters that more easily predict simultaneously.For any porosint, always can survey for these two, but other indexs (as specific surface area etc.) are not so, measure that they are very inconvenient sometimes, then can't carry out sometimes with the existing equipment condition at all.But, test certain technology material in the several specific surface area values that can survey under (or easily surveying) situation, thereby obtain corresponding n value and K by the computing formula of the inventive method
SValue goes out this material of this technology in the specific surface area value that can not survey under (or difficult survey) situation with regard to available porosity and aperture indirect calculation.Certainly also accident and specific surface area when estimating easy survey the thus.
Claims (2)
1. computing method about specific surface area of foamed nickel is characterized in that utilizing the easy survey parameter of this type of material and the specific surface area that calculates this material indirectly.
2. the described easy survey parameter of claim 1 is porosity and these two the most basic parameters of porosint of aperture of nickel foam.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101318792A CN101566553B (en) | 2009-04-09 | 2009-04-09 | Computing method for specific surface area of foamed nickel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2009101318792A CN101566553B (en) | 2009-04-09 | 2009-04-09 | Computing method for specific surface area of foamed nickel |
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| CN101566553A true CN101566553A (en) | 2009-10-28 |
| CN101566553B CN101566553B (en) | 2010-12-01 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102721635A (en) * | 2012-06-19 | 2012-10-10 | 山东科技大学 | Quantitative analysis method for amount of precipitated wax of reservoirs with different pore structures |
| CN103630478A (en) * | 2013-12-09 | 2014-03-12 | 陕西科技大学 | Method for measuring initial self-imbibition rate of porous calcium carbonate |
| CN109632603A (en) * | 2019-01-04 | 2019-04-16 | 长沙理工大学 | A kind of the specific surface area calculation method and system of foam metal |
| WO2019233053A1 (en) * | 2018-06-05 | 2019-12-12 | 常德力元新材料有限责任公司 | Microporous foamed nickel and preparation method therefor |
-
2009
- 2009-04-09 CN CN2009101318792A patent/CN101566553B/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102721635A (en) * | 2012-06-19 | 2012-10-10 | 山东科技大学 | Quantitative analysis method for amount of precipitated wax of reservoirs with different pore structures |
| CN103630478A (en) * | 2013-12-09 | 2014-03-12 | 陕西科技大学 | Method for measuring initial self-imbibition rate of porous calcium carbonate |
| CN103630478B (en) * | 2013-12-09 | 2015-11-04 | 陕西科技大学 | Imbibition rate measuring method is started from the beginning of a kind of porous calcium carbonate |
| WO2019233053A1 (en) * | 2018-06-05 | 2019-12-12 | 常德力元新材料有限责任公司 | Microporous foamed nickel and preparation method therefor |
| CN109632603A (en) * | 2019-01-04 | 2019-04-16 | 长沙理工大学 | A kind of the specific surface area calculation method and system of foam metal |
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| Publication number | Publication date |
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| CN101566553B (en) | 2010-12-01 |
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