CN1584083A - Ni-Al intermetallic compound porous materials and preparing process thereof - Google Patents
Ni-Al intermetallic compound porous materials and preparing process thereof Download PDFInfo
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- CN1584083A CN1584083A CN 200410046492 CN200410046492A CN1584083A CN 1584083 A CN1584083 A CN 1584083A CN 200410046492 CN200410046492 CN 200410046492 CN 200410046492 A CN200410046492 A CN 200410046492A CN 1584083 A CN1584083 A CN 1584083A
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Abstract
A Ni-Al intermetallic compound porous materials and its preparing process are disclosed. The process includes: 1) preparing powder; 2) drying various powders; 3) mixing in ball mill and packing the powders into powder-feeding pot with funnel-shaped end; 4) packing mould a. placing the mould on rotary disc down to the powder-feeding pot, b. rotary disc rotating mould with 50-75rot/min rotating speed, c. starting powder-feeding switch, powder dropping into the mould, knocking mould wall and thickening the powder; 5) preheating mould with powders to 300-450deg.C in heating furnace; 6) initiating reacting by electrifying heating, shutting power supply after reacting; 7) slowly cooling the product and mould to room temperature; 8) demoulding and stacking the porous product. It achieves low cost, simple process and good performance.
Description
Affiliated technical field
The present invention relates to a kind of porous material and preparation technology thereof, more particularly, the present invention relates to a kind of Ni-Al intermetallic compound porous material and preparation technology thereof, belong to the synthetic and manufacture field of material.The present invention should be divided into C portion in International Patent Classification (IPC).
Background technology
Automobile exhaust purifier is the control unit of motor vehicle exhaust, and the quality of its performance is the filter effect of decision tail gas directly.Aseptic in cleaner is three-way catalyst, and catalyzer is attached on the various carriers, and the performance of carrier, form directly have influence on the catalyzed conversion effect.Therefore, support of the catalyst is the key part of automobile exhaust purifier.
At present, carrier mainly is pottery and metal two classes, the Heat stability is good of ceramic monolith, but fragility is big, frequent because of violent vibrations and thermal shocking fragmentation, thus purification function lost, and cause exhaust to stop up, and the thermal capacity of ceramic monolith is big, makes the catalyzer catalyzed conversion weak effect when cold-starting automobile that adheres to; Metallic carrier intensity height, thermal conductivity is good, but poor heat resistance, coefficient of thermal expansion is big, and the manufacturing process complexity, costs an arm and a leg.
Porous intermetallic compound is a kind of ideal catalyst support material, and wide application prospect is arranged.At present, the method for preparing porous material has smelting process, powder metallurgic method, fiber metallurgy method, casting, metal deposition, corrosion port-creating method, redox sintering process etc.Although they based on different principles, from the different structure level, all differ from one another, brought into play vital role in the development of porous material, in producing.But shortcomings such as these technologies exist mostly that facility investment is big, complex procedures, technological process length consuming time, energy expenditure are big, equipment complexity, and the porosity poor controllability of the porous material that makes.Obtain the ideal support of the catalyst, the technology of preparing of material itself and porous support is of equal importance, say in a sense, the level of this technology of preparing is restricting the function performance of solid support material to a great extent, is also restricting porous material in the more application of wide field, more crucial occasion simultaneously.
Summary of the invention
The objective of the invention is to:, provide a kind of and prepare Ni-Al intermetallic compound porous material and preparation technology thereof with the chemical reaction between Ni, the Al element at the deficiency of prior art.Compare with prior art, technology of the present invention is simple, and cost is low, and performance is more superior.
The objective of the invention is to be achieved through the following technical solutions:
Its processing step is as follows:
(1) preparation powder
(4) get Ni, Al, Co, Fe, Cu, NiAl powder ready,
(5) Ni, Co, Fe, Cu, Al, NiAl powder are sieved respectively, wherein:
The granularity of Ni, Co, Fe, Cu powder is the 200-400 order,
The granularity of Al, NiAl powder is the 100-200 order,
(6) according to following mass percent difference weighing powder, wherein:
Ni 70-80％
Al 15-25％
Co 2-8％
Fe 1-5％
Cu 1-5％
NiAl 1-10％，
In this reaction system, Ni, Al, Co, Fe, Cu are reagents, and NiAl is for generating mutually and thinner;
(2) oven dry
The various powder that above-mentioned weighing finishes are dried respectively;
(3) mix
Mixing on ball mill, is in the funnel shaped powder feeding tank with the mixed powder lower end of packing into;
(4) dress mould
(1) mould is placed on the rotating disk of described powder feeding tank below,
(2) make rotating disk drive the mould rotation, speed of rotation is 50-75rot/min,
(3) open the powder feeding switch, in the powder free-falling mould,, knock mold wall slightly simultaneously, make powder closely knit along with the whereabouts of powder;
(5) will pack into the mould of powder in process furnace preheating 300-450 ℃;
(6) energising adds thermal booster reaction, and reaction finishes the back powered-down;
(7) goods together with the mould furnace cooling to room temperature;
(8) slough mould, the porous finished product are piled up, standby.
In specific embodiment:
In described baking step, the temperature of oven dry is 150-200 ℃, and the time of oven dry is 6-8 hour.
In described mixing step, the blended time is 10-15 hour on ball mill.
Described process furnace is a vacuum furnace.
The processing step of first embodiment is as follows:
(1) preparation powder
(1) get Ni, Al, Co, Fe, Cu, NiAl powder ready,
(2) Ni, Co, Fe, Cu, Al, NiAl powder are sieved respectively, wherein:
The granularity of Ni, Co, Fe, Cu powder is 400 orders,
The granularity of Al, NiAl powder is 2 00 orders,
(3) according to following mass percent difference weighing powder, wherein:
Ni 71％
Al 18％
Co 3％
Fe 2％
Cu 3％
NiAl 3％，
In this reaction system, Ni, Al, Co, Fe, Cu are reagents, and NiAl is for generating mutually and thinner;
(2) oven dry
The various powder that above-mentioned weighing finishes were dried respectively 8 hours;
(3) mix
Mixing on ball mill 10 hours, is in the funnel shaped powder feeding tank with the mixed powder lower end of packing into;
(4) dress mould
(1) mould is placed on the rotating disk of described powder feeding tank below,
(2) make rotating disk drive the mould rotation, speed of rotation is 55rot/min,
(3) open the powder feeding switch, in the powder free-falling mould,, knock mold wall slightly simultaneously, make powder closely knit along with the whereabouts of powder;
(5) mould of powder 300 ℃ of the preheatings in process furnace of will packing into;
(6) energising adds thermal booster reaction, and reaction finishes the back powered-down;
(7) goods together with the mould furnace cooling to room temperature;
(8) slough mould, the porous finished product are piled up, standby.
Described process furnace is a vacuum furnace.
The processing step of second embodiment is as follows:
(1) preparation powder
(1) get Ni, Al, Cu, NiAl powder ready,
(2) Ni, Cu, Al, NiAl powder are sieved respectively, wherein:
The granularity of Ni, Cu powder is 200 orders,
The granularity of Al, NiAl powder is the 100-150 order,
(3) according to following mass percent difference weighing powder, wherein:
Ni 70-79％
Al 15-24％
Cu 1-5％
NiAl 5-10％，
In this reaction system, Ni, Al, Cu are reagents, and NiAl is for generating mutually and thinner;
(2) oven dry
The various powder that above-mentioned weighing finishes were dried respectively 8 hours;
(3) mix
Mixing on ball mill 10 hours, is in the funnel shaped powder feeding tank with the mixed powder lower end of packing into;
(4) dress mould
(1) mould is placed on the rotating disk of described powder feeding tank below,
(2) make rotating disk drive the mould rotation, speed of rotation is 75rot/min,
(3) open the powder feeding switch, in the powder free-falling mould,, knock mold wall slightly simultaneously, make powder closely knit along with the whereabouts of powder;
(5) mould of powder 450 ℃ of the preheatings in process furnace of will packing into;
(6) energising adds thermal booster reaction, and reaction finishes the back powered-down;
(7) goods together with the mould furnace cooling to room temperature;
(8) slough mould, the porous finished product are piled up, standby.
Described process furnace is a vacuum furnace.
Because the present invention has adopted above-mentioned technical scheme, the present invention has the following advantages and positively effect:
1, utilizes the synthesizing porous Ni-Al series intermetallic compound material of chemical reaction original position between the Ni-Al;
2, synthetic porous material inside holes pattern is the network-like structure that 3 D stereo is communicated with, and has big specific surface area;
3, by changing the various processing parameters of reaction in process, adjust the proportioning of reaction system, physical strength, hole size, the porosity of synthetic porous material are in very large range changed.
4, make full use of the heat effect of chemical reaction heat, both energy-conservation, reduce facility investment again;
5, Ni, Al speed of response are fast, poromerics efficient height;
6, the reaction synthesis technique is simple, and non-environmental-pollution.
Embodiment
The present invention is further described below in conjunction with specific embodiment:
Embodiment 1-porous Ni, Al intermetallic compound support of the catalyst
The kind of automobile tail gas purifier catalyst carrier, composition, surface-area, pore structure, thermal conductivity, thermotolerance, physical strength, preparation method etc. have significant effects to catalyzer, and a kind of ideal automotive catalyst carrier should possess following condition: 1. do not contain the material that makes poisoning of catalyst; 2. high thermostability; 3. enough physical strengths; 4. pore structure and big specific surface area; 5. low thermal capacity, high thermal conductivity; 6. coefficient of thermal expansion is little, with coating good binding intensity is arranged.Adopt Ni-Al reaction in technology to obtain porous intermetallic compound support of the catalyst in the present embodiment, the concrete processing step of present embodiment is as follows:
(1) preparation powder
(1) get Ni, Al, Co, Fe, Cu, NiAl powder ready,
(2) Ni, Co, Fe, Cu, Al, NiAl powder are sieved respectively, wherein:
The granularity of Ni, Co, Fe, Cu powder is 400 orders,
The granularity of Al, NiAl powder is 200 orders,
(3) according to following mass percent difference weighing powder, wherein:
Ni 71％
Al 18％
Co 3％
Fe 2％
Cu 3％
NiAl 3％，
In this reaction system, Ni, Al, Co, Fe, Cu are reagents, and NiAl is for generating mutually and thinner;
(2) oven dry
The various powder that above-mentioned weighing finishes were dried respectively 8 hours;
(3) mix
Mixing on ball mill 10 hours, is in the funnel shaped powder feeding tank with the mixed powder lower end of packing into;
(4) dress mould
(1) mould is placed on the rotating disk of described powder feeding tank below,
(2) make rotating disk drive the mould rotation, speed of rotation is 55rot/min,
(3) open the powder feeding switch, in the powder free-falling mould,, knock mold wall slightly simultaneously, make powder closely knit along with the whereabouts of powder;
(5) mould of powder 300 ℃ of the preheatings in process furnace of will packing into;
(6) utilize the initiation reaction of energising heating tungsten filament, reaction finishes the back powered-down;
(7) goods together with the mould furnace cooling to room temperature;
(8) slough mould gently, the porous finished product are piled up, standby.The standby following process that also comprises is herein put in order.The porous Ni-Al intermetallic compound carrier pore quantity that obtains through check reaction in technology can reach 600-900 hole/square inch; High thermal resistance is 1100 ℃; Thermal conductivity can reach 2.0 * 10
-2JS
-1Cm
-1K
-1Thermal expansivity is 1.1 * 10
-6K
-1Ultimate compression strength can reach 37.2Mp.
Embodiment 2-porous Ni, Al intermetallic compound liquid filter
Porous Ni, Al inter-metallic compound material can be used for the filtration of multiple liquid, and when liquid passed through porous material, by means of the three-D pore structure of its inside, turbulent flow can be converted into highly stable laminar flow, thereby help the assorted and exhaust of filter.Present embodiment is the embodiment that obtains porous intermetallic compound strainer about employing Ni-Al reaction in technology, and concrete steps are as follows:
(1) preparation powder
(1) get Ni, Al, Cu, Ni Al powder ready,
(2) Ni, Cu, Al, NiAl powder are sieved respectively, wherein:
The granularity of Ni, Cu powder is 200 orders,
The granularity of Al, NiAl powder is the 100-150 order,
(3) according to following mass percent difference weighing powder, wherein:
Ni 70-79％
Al 15-24％
Cu 1-5％
NiAl 5-10％，
In this reaction system, Ni, Al, Cu are reagents, and NiAl is for generating mutually and thinner;
(2) oven dry
The various powder that above-mentioned weighing finishes were dried respectively 8 hours;
(3) mix
Mixing on ball mill 10 hours, is in the funnel shaped powder feeding tank with the mixed powder lower end of packing into;
(4) dress mould
(1) mould is placed on the rotating disk of described powder feeding tank below,
(2) make rotating disk drive the mould rotation, speed of rotation is 75rot/min,
(3) open the powder feeding switch, in the powder free-falling mould,, knock mold wall slightly simultaneously, make powder closely knit along with the whereabouts of powder;
(5) mould of powder 450 ℃ of the preheatings in process furnace of will packing into;
(6) energising adds thermal booster reaction, and reaction finishes the back powered-down;
(7) goods together with the mould furnace cooling to room temperature;
(8) slough mould, the porous finished product are piled up, standby.
The standby content of carrying out the following process arrangement that comprises described herein.The porous Ni-Al intermetallic compound liquid filter that obtains of reaction in technology after testing, pore quantity can reach 400-600 hole/square inch.This kind strainer can be used for following occasion:
1, steam: 120-250 degree water vapor is widely used in can removing metal fines or other impurity with porous Ni-Al intermetallic compound liquid filter in chemistry, pharmacy and other the industrial equipment washing process.
2, petroleum product: difficult problem of normal existence during oil and other fuel utilize, remove impurity and water exactly, this difficult problem especially perplexs waterpower hydraulic pressure dress system, refining of petroleum system.Porous material is made tubulose, be used for used lubricant, the cleaning effect of used for vehicle oil is fabulous.But on the porous filtering pipe, add the water in the hydrophobic material degree of depth removing petroleum product.This product can be repeatedly used.Clean with barbecue, purge mode.
3, Huan Shui, tap water: this product can effectively be removed the various mix suspending things in the water, reduces their 10 times of bonding forces.Way of recycling is repeated washing purge, the cleaning of 8%HCI solution.
4, the water of cleaning discharging: biological process cleaning sewage must make its oxidation, makes its oxidation thereby add pressurized air by this product in water for this reason.
5, other purposes: fishpond is filled oxygen, and can be used as the oxygenating machine.The performance of inter-metallic compound material has the desired excellent properties of high-temperature structural material between metal and pottery, have that density is low, high temperature specific tenacity, specific rigidity, creep resistance, an a series of advantage such as anti-oxidant, anticorrosive.Utilize this technology that inter-metallic compound material is made vesicular, the carrier that is used for automobile exhaust purifier, can satisfy hot strength, resistance to sudden heating, the thermostability requirement of carrier, and because of its high chemical stability, at high temperature not with catalyst reaction, can not make poisoning of catalyst, and high thermal conductivity, can guarantee that catalyzer is not sintered and loses activity.Therefore, intermetallic compound porous material is the ideal catalyst support material.This material is aspect sewage disposal, the petrochemical catalyst carrier and metallurgical filter and all respects such as daily life also have broad application prospects.Need to prove: the same with the present invention, use this technology, Ti-Al, Fe-Al, Ni-Ti series intermetallic compound also can make the porous material the same with the present invention.
Claims (8)
1. Ni-Al intermetallic compound porous material and preparation technology thereof, it is characterized in that: its processing step is as follows:
(1) preparation powder
(1) get Ni, Al, Co, Fe, Cu, NiAl powder ready,
(2) Ni, Co, Fe, Cu, Al, NiAl powder are sieved respectively, wherein:
The granularity of Ni, Co, Fe, Cu powder is the 200-400 order,
The granularity of Al, Ni Al powder is the 100-200 order,
(3) according to following mass percent difference weighing powder, wherein:
Ni 70-80％
Al 15-25％
Co 2-8％
Fe 1-5％
Cu 1-5％
NiAl 1-10％，
In this reaction system, Ni, Al, Co, Fe, Cu are reagents, and NiAl is for generating mutually and thinner;
(2) oven dry
The various powder that above-mentioned weighing finishes are dried respectively;
(3) mix
Mixing on ball mill, is in the funnel shaped powder feeding tank with the mixed powder lower end of packing into;
(4) dress mould
(1) mould is placed on the rotating disk of described powder feeding tank below,
(2) make rotating disk drive the mould rotation, speed of rotation is 50-75rot/min,
(3) open the powder feeding switch, in the powder free-falling mould,, knock mold wall slightly simultaneously, make powder closely knit along with the whereabouts of powder;
(5) will pack into the mould of powder in process furnace preheating 300-450 ℃;
(6) energising adds thermal booster reaction, and reaction finishes the back powered-down;
(7) goods together with the mould furnace cooling to room temperature;
(8) slough mould, the porous finished product are piled up, standby.
2. Ni-Al intermetallic compound porous material according to claim 1 and preparation technology thereof is characterized in that: in described baking step, the temperature of oven dry is 150-200 ℃, and the time of oven dry is 6-8 hour.
3. Ni-Al intermetallic compound porous material according to claim 1 and preparation technology thereof is characterized in that: in described mixing step, the blended time is 10-15 hour on ball mill.
4. Ni-Al intermetallic compound porous material according to claim 1 and preparation technology thereof is characterized in that: described process furnace is a vacuum furnace.
5. according to claim 1,2,3 described Ni-Al intermetallic compound porous material and preparation technologies thereof, it is characterized in that: its processing step is as follows:
(1) preparation powder
(1) get Ni, Al, Co, Fe, Cu, NiAl powder ready,
(2) Ni, Co, Fe, Cu, Al, NiAl powder are sieved respectively, wherein:
The granularity of Ni, Co, Fe, Cu powder is 400 orders,
The granularity of Al, NiAl powder is 200 orders,
(3) according to following mass percent difference weighing powder, wherein:
Ni 71％
Al 18％
Co 3％
Fe 2％
Cu 3％
NiAl 3％，
In this reaction system, Ni, Al, Co, Fe, Cu are reagents, and NiAl is for generating mutually and thinner;
(2) oven dry
The various powder that above-mentioned weighing finishes were dried respectively 8 hours;
(3) mix
Mixing on ball mill 10 hours, is in the funnel shaped powder feeding tank with the mixed powder lower end of packing into;
(4) dress mould
(1) mould is placed on the rotating disk of described powder feeding tank below,
(2) make rotating disk drive the mould rotation, speed of rotation is 55rot/min,
(3) open the powder feeding switch, in the powder free-falling mould,, knock mold wall slightly simultaneously, make powder closely knit along with the whereabouts of powder;
(5) mould of powder 300 ℃ of the preheatings in process furnace of will packing into;
(6) energising adds thermal booster reaction, and reaction finishes the back powered-down;
(7) goods together with the mould furnace cooling to room temperature;
(8) slough mould, the porous finished product are piled up, standby.
6. Ni-Al intermetallic compound porous material according to claim 5 and preparation technology thereof is characterized in that: described process furnace is a vacuum furnace.
7. according to claim 1,2,3 described Ni-Al intermetallic compound porous material and preparation technologies thereof, it is characterized in that: its processing step is as follows:
(1) preparation powder
(1) get Ni, Al, Cu, NiAl powder ready,
(2) Ni, Cu, Al, NiAl powder are sieved respectively, wherein:
The granularity of Ni, Cu powder is 200 orders,
The granularity of Al, NiAl powder is the 100-150 order,
(3) according to following mass percent difference weighing powder, wherein:
Ni 70-79％
Al 15-24％
Cu 1-5％
NiAl 5-10％，
In this reaction system, Ni, Al, Cu are reagents, and NiAl is for generating mutually and thinner;
(2) oven dry
The various powder that above-mentioned weighing finishes were dried respectively 8 hours;
(3) mix
Mixing on ball mill 10 hours, is in the funnel shaped powder feeding tank with the mixed powder lower end of packing into;
(4) dress mould
(1) mould is placed on the rotating disk of described powder feeding tank below,
(2) make rotating disk drive the mould rotation, speed of rotation is 75rot/min,
(3) open the powder feeding switch, in the powder free-falling mould,, knock mold wall slightly simultaneously, make powder closely knit along with the whereabouts of powder;
(5) mould of powder 450 ℃ of the preheatings in process furnace of will packing into;
(6) energising adds thermal booster reaction, and reaction finishes the back powered-down;
(7) goods together with the mould furnace cooling to room temperature;
(8) slough mould, the porous finished product are piled up, standby.
8. Ni-Al intermetallic compound porous material according to claim 7 and preparation technology thereof is characterized in that: described process furnace is a vacuum furnace.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410046492 CN1584083A (en) | 2004-06-10 | 2004-06-10 | Ni-Al intermetallic compound porous materials and preparing process thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410046492 CN1584083A (en) | 2004-06-10 | 2004-06-10 | Ni-Al intermetallic compound porous materials and preparing process thereof |
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| Publication Number | Publication Date |
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| CN1584083A true CN1584083A (en) | 2005-02-23 |
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ID=34602008
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| Application Number | Title | Priority Date | Filing Date |
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| CN 200410046492 Pending CN1584083A (en) | 2004-06-10 | 2004-06-10 | Ni-Al intermetallic compound porous materials and preparing process thereof |
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2004
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