CN107940782A - A kind of inexpensive compound heat accumulation ceramics of solar energy thermal-power-generating sensible heat latent heat and preparation method thereof - Google Patents
A kind of inexpensive compound heat accumulation ceramics of solar energy thermal-power-generating sensible heat latent heat and preparation method thereof Download PDFInfo
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- CN107940782A CN107940782A CN201711066294.8A CN201711066294A CN107940782A CN 107940782 A CN107940782 A CN 107940782A CN 201711066294 A CN201711066294 A CN 201711066294A CN 107940782 A CN107940782 A CN 107940782A
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Abstract
The present invention relates to a kind of inexpensive compound heat accumulation ceramics of solar energy thermal-power-generating sensible heat latent heat and preparation method thereof, the compound heat accumulation ceramics are obtained by encapsulating latent heat alloy powder in the sensible heat ceramic matrix of honeycomb；The raw material and mass percent of the sensible heat ceramic matrix be：Coaseries kaolin 65~70%, aluminium powder 30~35%.Thermal storage density >=1500kJ/kg (room temperature~1000 DEG C) of the compound heat accumulation ceramics of sensible heat latent heat provided by the invention, 1000 DEG C~room temperature thermal cycle 100 times is without cracking, alloy No leakage, alloy and ceramic matrix meet the performance requirement of solar energy thermal-power-generating heat accumulating without chemical reaction.
Description
Technical field
The invention belongs to energy new material technology field, and in particular to a kind of inexpensive solar energy thermal-power-generating sensible heat-latent
Compound heat accumulation ceramics of heat and preparation method thereof.
Background technology
Solar energy thermal-power-generating is by way of optically focused, first converts the solar into high-grade thermal energy, and then pass through this
Special woods generator realizes the technology of power generation.Solar heat power generation system includes light and heat collection system, heat reservoir, power generation system
System and the part such as control system, wherein heat reservoir is by storing heat, in the case of no sunlight, smoothly heat release for
Power generation, so as to efficiently solve the electric power output pulsation problem brought by the intermittence of sunlight.Since heat reservoir needs for a long time
Work under 200~900 DEG C of high temperature, therefore it is required that heat accumulating will not only have high storage density, also to have well
High temperature resistant and thermal shock resistance.
Heat accumulating is the key of solar energy thermal-power-generating heat reservoir, there is point of sensible heat and latent heat heat accumulating.Often at present
The researching of sensible heat storage material seen is mostly corundum and mullite-like cellular ceramic,《Selection of materials for high
temperature sensible energy storage》One the article pointed out, the cost performance of corundum in high temperature researching of sensible heat storage material
Highest.Chinese invention patent《Corundum-mullite honeycomb ceramic heat accumulator》(102399082 B of CN) discloses one kind with firm
Jade, mullite, aluminium oxide and clay etc. are corundum-mullite honeycomb ceramic heat accumulator prepared by raw material.Although corundum and Mo Lai
Stone honeycomb ceramic has good mechanical performance, anticorrosive and scour resistance, but there are cost of material height, thermal shock resistance
Can be poor the defects of.
Latent heat heat accumulating common at present is mostly fused salt and alloy, such as Chinese invention patent《One kind mixing nano particle
High-termal conductivity heat accumulation fused salt and preparation method thereof》(103289653 A of CN) discloses a kind of heat accumulation for mixing nano particle and melts
Salt, the thermal conductivity of fused salt is mutually improved by adding high heat conduction.However, fused salt is respectively provided with stronger corrosion with alloy heat accumulating
Property, the safety and effectivity operation of whole heat reservoir can be influenced, and fused salt heat accumulating heat conductivility is poor, alloy heat accumulating valency
Lattice are expensive.
As it can be seen that single sensible heat or latent heat heat accumulation mode can not ensure efficient stable heat accumulation, and common heat-storage technology is more
Fused salt or alloy phase change material are stored for canister, is corroded there are heat storage can and undergoes phase transition the hidden danger of material leakage.At present
There are a small number of researchs on the compound heat accumulation of sensible heat-latent heat, but there is also ceramic matrix thermal shock resistance is poor, thermal conductivity is low not
Foot.Therefore, the method comprises the steps of firstly, preparing cost is low, the ceramic honey comb matrix (sensible heat) of good in thermal shock, corrosion resistance and good,
Packaging phase change material (latent heat) wherein again, obtains the compound heat accumulation ceramics of sensible heat-latent heat, had so both overcome sensible heat material cost
High, the shortcomings that thermal shock resistance is poor, and solve the problems, such as that phase-change heat-storage material corrosivity is strong.
The content of the invention
The technical problems to be solved by the invention are to be directed to above-mentioned deficiency existing in the prior art, there is provided a kind of cost
It is low, storage density is high, the solar energy thermal-power-generating of good heat conductivity, good in thermal shock sensible heat-latent heat compound heat accumulation ceramics and
Its preparation method.
In order to solve the above technical problems, technical solution provided by the invention is：
A kind of inexpensive solar energy thermal-power-generating sensible heat-latent heat compound heat accumulation ceramics are provided, the compound heat accumulation ceramics by
Encapsulation latent heat alloy powder obtains in the sensible heat ceramic matrix of honeycomb；
The raw material and mass percent of the sensible heat ceramic matrix be：Coaseries kaolin 65~70%, aluminium powder 30~35%；
Latent heat alloy powder loadings account for the 2/3~3/4 of sensible heat ceramic matrix pore volume in the compound heat accumulation ceramics.
By such scheme, the latent heat alloy powder is Al-Si alloy powders.
The present invention also provides the preparation method of the above-mentioned compound heat accumulation ceramics of inexpensive solar energy thermal-power-generating sensible heat-latent heat,
Its step is as follows：
1) sensible heat ceramic matrix is prepared：Ball milling, sieving are distinguished after Coaseries kaolin and aluminium powder are weighed in proportion, is then put
Mixture is mixed to get in kneader, binding agent, lubricant and water are added in mixture and is uniformly mixed, then uses vacuum pugging
Machine pugging, aging good pug is obtained through aging, and aging good pug is extruded by extruder, cuts and obtains ceramic honey comb base
Body, then shapes through microwave, is dry, then by saggar of the ceramic honey comb base substrate embedment equipped with graphite powder (325 mesh graphite microparticles)
It is fired into sensible heat ceramic matrix；
2) the compound heat accumulation ceramics of solar energy thermal-power-generating sensible heat-latent heat are prepared：By sensible heat ceramic matrix through hole obtained by step 1)
One end coating encapsulation pug, latent heat alloy powder is inserted in dry backward through hole and with encapsulating the pug package via other end, then
The honeycomb ceramic body of encapsulation latent heat alloy powder is obtained after drying, finally honeycomb ceramic body is carried out to be thermally treated resulting in solar heat
The compound heat accumulation ceramics of the sensible heat-latent heat that generates electricity.
By such scheme, the step 1) sieving was 250~325 mesh sieves.
By such scheme, the step 1) binding agent is carboxymethyl cellulose, polyvinyl alcohol, one kind in waterglass or more
The mixture of kind, addition are the 3~5% of mixture quality；The lubricant is the mixed of one or both of tung oil, soya-bean oil
Compound, addition are the 4~6% of mixture quality；The addition of water is the 16~22% of mixture quality.
By such scheme, step 1) the extruder extrusion pressure is 2~4MPa.
By such scheme, step 1) the microwave setting process condition is：Microwave power is 5KW, frequency for 2450 ±
50MHz, microwave setting time are 5~10min.
By such scheme, step 1) the firing process condition is：Heated up at room temperature with the heating rate of 3~5 DEG C/min
To 1450~1550 DEG C, 2~3h is kept the temperature.
By such scheme, the preparation method of step 2) the encapsulation pug is：
A) raw material is weighed by following mass percent：Ceramic honey comb powder 60~70%, antiflux 30~40%, by original
250~325 mesh sieves are crossed after material difference ball milling, remix to obtain mixed powder, wherein the ceramic honey comb powder raw material and quality
Than for：Coaseries kaolin 65~70%, aluminium powder 30~35%；The antiflux is waste glass powder or melts one kind in the block；
B) adhesive solution is added into mixed powder obtained by step a), 10~20min is mediated and obtains encapsulation pug.
Preferably, the step b) adhesive solutions are the carboxymethyl cellulose or poly- second that mass concentration is 3~5%
Enol aqueous solution, addition are the 40~60% of mixed powder quality.
By such scheme, the step 2) heat treatment condition is：900 are warming up to the speed of 5~8 DEG C/min~
950 DEG C, keep the temperature 20~40min.
The present invention selects coal-mine waste, by mass transferring in gas phase principle, situ synthesis techniques, prepares rich in silicon carbide whisker
Ceramic honey comb matrix：Coaseries kaolin generates silicon carbide whisker with burying graphite powder used in burning by complicated gas phase, solid phase reaction,
Silicon carbide whisker is combined closely with the corundum obtained after aluminium powder oxidation through high temperature firing, on the one hand be instead of and traditional is first closed respectively
Into corundum and carborundum (SiC synthesis temperature is usually above 2000 DEG C), the preparation method of firing, another aspect carbon are remixed
The introducing of SiClx whisker substantially increases the heat conductivility and thermal shock resistance of ceramic material.Encapsulated again in ceramic honey comb through hole
A certain amount of alloy powder, so as to improve the quantity of heat storage of whole heat accumulating.
Phase-change material is packaged in the ceramic honey comb of high densification by the present invention, not only realizes sensible heat-latent heat storage well
Heat, and solve the problems, such as that phase-change material corrodes thermal storage device, heat exchanger, so as to ensure that solar energy thermal-power-generating heat reservoir is grown
Long stable operation, its service life are longer than traditional fused salt tank heat reservoir.
The beneficial effects of the present invention are：1st, the compound heat accumulation ceramics of solar energy thermal-power-generating sensible heat-latent heat provided by the invention
Obtained by encapsulating latent heat alloy powder in the sensible heat ceramic matrix of honeycomb, wherein sensible heat ceramic matrix thermal conductivity>8W/(m·
K), higher than common corundum and mullite-like cellular ceramic；1000 DEG C~room temperature anti-thermal shock is circulated 10 times and not cracked, and is exceeded《Bee
Nest ceramics》The requirement of national standard (GB/T25994-2010), and thermal storage density >=1500kJ/ of the compound heat accumulation ceramics of sensible heat-latent heat
Kg (room temperature~1000 DEG C), 1000 DEG C~room temperature thermal cycle 100 times is without cracking, and alloy No leakage, alloy is with ceramic matrix without change
Reaction is learned, meets the performance requirement of solar energy thermal-power-generating heat accumulating.2nd, preparation process of the present invention is simple, raw material environmental protection, and
Relative inexpensiveness, solar energy thermal-power-generating heat accumulation ceramics are prepared using rich reserves, low-cost Coaseries kaolin as primary raw material,
Than the cost savings 1/3~1/2 of common corundum, mullite-like cellular ceramic heat storage, in addition, Coaseries kaolin in the present invention
Dosage reach 70%, contribute to solve brought by its bulk deposition land occupation, waste of resource, environmental pollution, safety
The problems such as hidden danger, have major economic value.
Brief description of the drawings
Fig. 1 is the structural representation of the compound heat accumulation ceramics of solar energy thermal-power-generating sensible heat-latent heat prepared by the embodiment of the present invention 1
Figure；
Fig. 2 is the scanning electron microscope (SEM) photograph of the sensible heat ceramic matrix prepared by embodiment 1；
Wherein：1- encapsulates pug；2- latent heat alloy powders；3- sensible heat ceramic matrixes.
Embodiment
To make those skilled in the art more fully understand technical scheme, the present invention is made below in conjunction with the accompanying drawings into
One step is described in detail.
Embodiment 1
A kind of compound heat accumulation of inexpensive solar energy thermal-power-generating sensible heat-latent heat is ceramic (structure diagram is shown in attached drawing 1), prepares
Step is as follows：
1) Feedstock treating：By Coaseries kaolin and aluminium powder difference ball milling 1h, 250 mesh sieves are crossed.
2) raw material proportioning：The mass percent of each raw material is：Coaseries kaolin 65%, aluminium powder 35%.
3) raw material mixes：Coaseries kaolin and aluminium powder mix 2h in kneader, obtain mixture；Added in mixture
Binding agent, lubricant and water mixing 20min, then with vacuum deairing machine pugging, aging 24h, obtains aging good pug.
The binding agent is carboxymethyl cellulose and polyvinyl alcohol in mass ratio 1:1 mixture, addition are mixture
The 3% of weight；Lubricant is tung oil, and addition is the 4% of mixture weight；The addition of water is the 18% of mixture weight.
4) honeycomb is body formed：Aging good pug is extruded by extruder, cuts into 100mm's long while extrusion
Ceramic honey comb base substrate；Extruder extrusion pressure is 3MPa.
5) microwave setting and drying：The ceramic honey comb base substrate of forming is put into micro-wave oven the 5min that shapes, Ran Houfang
Enter in infrared drying oven through 90 DEG C of dry 2h, obtain dried base substrate；Microwave power is 5kW, frequency 2450MHz.
6) burn till：Will in dried saggar of the base substrate embedment equipped with graphite powder (325 mesh), be put into electrical kiln with 3 DEG C/
The heating rate of min is warming up to 1450 DEG C, keeps the temperature 3h, obtains the sensible heat ceramic matrix 3 of honeycomb.
7) alloy is encapsulated：The mass percent as shared by raw material：The ceramic honey comb powder 60% that step 1~6 obtain, high temperature melting
Agent 40%, crosses 250 mesh sieves after ball milling 1h respectively, remixes 2h；Adhesive solution is added in mixed powder, 10min is mediated and obtains
To encapsulation pug 1.In through hole one end of sensible heat ceramic matrix 3 coating encapsulation pug 1, it is then placed in 80 DEG C of baking oven dry
2h, then latent heat alloy powder 2 (Al-12Si alloyed powders) makes that it accounts for pore volume 2/3 is poured into, coat envelope in the other end of through hole
Pug 1 is filled, places into 80 DEG C of oven drying 2h.
The antiflux is waste glass powder, and the adhesive solution is the carboxymethyl cellulose that mass fraction is 3%
Plain aqueous solution, addition are the 40% of mixed powder quality.
8) heat treatment of encapsulating material：The honeycomb ceramic body for encapsulating Al-12Si alloys is warming up to the speed of 5 DEG C/min
900 DEG C, 30min is kept the temperature, obtains the compound heat accumulation ceramics of sensible heat-latent heat.
After tested, the thermal conductivity of ceramic honey comb matrix of the invention is 8.5W/ (mK), and 1000 DEG C~room temperature anti-thermal shock is followed
Ring does not crack for 10 times.The thermal storage density of the compound heat accumulation ceramics of sensible heat-latent heat of the present invention is 1550kJ/kg (room temperature~1000
DEG C), 1000 DEG C~room temperature thermal cycle 100 times, without chemical reaction, meets too without cracking, alloy No leakage, alloy with ceramic matrix
The performance requirement of the positive heat accumulating that hot can generate electricity.
The structure of the compound heat accumulation ceramics of solar energy thermal-power-generating sensible heat-latent heat to be prepared through above-mentioned steps is shown as shown in Figure 1
It is intended to.The loadings of alloy are 2/3 (loadings of alloy are optimal with the 2/3~3/4 of pore volume) of pore volume, are used
The heat exchange efficiency of heat accumulating and working media (air) is improved every row's packaged type.
It is illustrated in figure 2 the scanning electron microscope (SEM) photograph through the ceramic matrix prepared by above-mentioned steps.It is as can be seen that in situ in material
A large amount of silicon carbide whiskers are synthesized, its presence can effectively improve the thermal shock resistance and thermal conductivity of ceramic matrix.
Embodiment 2
A kind of compound heat accumulation ceramics of inexpensive solar energy thermal-power-generating sensible heat-latent heat, preparation process are as follows：
1) Feedstock treating：By Coaseries kaolin and aluminium powder difference ball milling 2h, 325 mesh sieves are crossed.
2) raw material proportioning：The mass percent of each raw material is：Coaseries kaolin 70%, aluminium powder 30%.
3) raw material mixes：Coaseries kaolin and aluminium powder mix 2h in kneader, obtain mixture；Added in mixture
Binding agent, lubricant and water mixing 30min, then with vacuum deairing machine pugging, aging 30h, obtains aging good pug.
The binding agent is polyvinyl alcohol and waterglass in mass ratio 1:1 mixture, addition are mixture weight
5%；Lubricant is soya-bean oil, and addition is the 5% of mixture weight；The addition of water is the 20% of mixture weight.
4) honeycomb is body formed：Aging good pug is extruded by extruder, cuts into 150mm's long while extrusion
Ceramic honey comb base substrate；Extruder extrusion pressure is 4MPa.
5) microwave setting and drying：The ceramic honey comb base substrate of forming is put into micro-wave oven the 10min that shapes, Ran Houfang
Enter in infrared drying oven through 110 DEG C of dry 1h, obtain dried base substrate；Microwave power is 5kW, frequency 2450MHz.
6) burn till：By in dried saggar of the base substrate embedment equipped with graphite powder, it is put into electrical kiln with the heating of 5 DEG C/min
Speed is warming up to 1550 DEG C, keeps the temperature 2h, obtains ceramic honey comb matrix.
7) alloy is encapsulated：The mass percent as shared by raw material：The ceramic honey comb powder 70% that step 1~6 obtain, high temperature melting
Agent 30%, crosses 325 mesh sieves after ball milling 2h respectively, weighs raw material, remix 1h；Adhesive solution is added in mixed powder, is pinched
Close 20min and obtain encapsulation pug.In through hole one end coating encapsulation pug of ceramic honey comb encapsulation alloy, 100 DEG C are then placed in
Dry 1h in baking oven, then Al-20Si alloyed powders make that it accounts for pore volume 3/4 is poured into, in the other end coating encapsulation mud of through hole
Expect (packaged type is shown in attached drawing 1), place into 100 DEG C of oven drying 1h.
The antiflux is frit, and the adhesive solution is the polyvinyl alcohol water solution that mass fraction is 5%,
Addition is the 60% of mixed powder quality.
8) heat treatment of encapsulating material：The honeycomb ceramic body for encapsulating Al-20Si alloys is warming up to the speed of 3 DEG C/min
950 DEG C, 20min is kept the temperature, obtains the compound heat accumulation ceramics of sensible heat-latent heat.
After tested, the thermal conductivity of ceramic honey comb matrix of the invention is 9.4W/ (mK), and 1000 DEG C~room temperature anti-thermal shock is followed
Ring does not crack for 10 times.The thermal storage density of the compound heat accumulation ceramics of sensible heat-latent heat of the present invention is 1630kJ/kg (room temperature~1000
DEG C), 1000 DEG C~room temperature thermal cycle 100 times, without chemical reaction, meets too without cracking, alloy No leakage, alloy with ceramic matrix
The performance requirement of the positive heat accumulating that hot can generate electricity.
Embodiment 3
A kind of compound heat accumulation ceramics of inexpensive solar energy thermal-power-generating sensible heat-latent heat, preparation process are as follows：
1) Feedstock treating：By Coaseries kaolin and aluminium powder difference ball milling 2h, 250 mesh sieves are crossed.
2) raw material proportioning：The mass percent of each raw material is：Coaseries kaolin 68%, aluminium powder 32%.
3) raw material mixes：Coaseries kaolin and aluminium powder mix 1h in kneader, obtain mixture；Added in mixture
Binding agent, lubricant and water mixing 20min, then with vacuum deairing machine pugging, aging 36h, obtains aging good pug.
The binding agent is polyvinyl alcohol, and addition is the 5% of mixture weight；Lubricant presses quality for tung oil and soya-bean oil
Than 1:1 mixture, addition are the 4% of mixture weight；The addition of water is the 22% of mixture weight.
4) honeycomb is body formed：Aging good pug is extruded by extruder, cuts into 150mm's long while extrusion
Ceramic honey comb base substrate；Extruder extrusion pressure is 3MPa.
5) microwave setting and drying：The ceramic honey comb base substrate of forming is put into micro-wave oven the 8min that shapes, Ran Houfang
Enter in infrared drying oven through 100 DEG C of dry 2h, obtain dried base substrate；Microwave power is 5kW, frequency 2450MHz.
6) burn till：By in dried saggar of the base substrate embedment equipped with graphite powder, it is put into electrical kiln with the heating of 3 DEG C/min
Speed is warming up to 1500 DEG C, keeps the temperature 2h, obtains ceramic honey comb matrix.
7) alloy is encapsulated：The mass percent as shared by raw material：The ceramic honey comb powder 65% that step 1~6 obtain, high temperature melting
Agent 35%, crosses 250 mesh sieves after ball milling 1.5h respectively, weighs raw material, remix 2h；；Adhesive solution is added in mixed powder,
Mediate 15min and obtain encapsulation pug.In through hole one end coating encapsulation pug of ceramic honey comb encapsulation alloy, 90 DEG C are then placed in
Dry 1.5h in baking oven, then Al-12Si alloyed powders make that it accounts for pore volume 2/3 is poured into, coat encapsulation in the other end of through hole
Pug (packaged type is shown in attached drawing 1), places into 90 DEG C of oven drying 1.5h.
The antiflux is waste glass powder, and the adhesive solution is the carboxymethyl cellulose that mass fraction is 4%
Plain aqueous solution, addition are the 55% of mixed powder quality.
8) heat treatment of encapsulating material：The honeycomb ceramic body for encapsulating Al-12Si alloys is warming up to the speed of 5 DEG C/min
940 DEG C, 20min is kept the temperature, obtains the compound heat accumulation ceramics of sensible heat-latent heat.
After tested, the thermal conductivity of ceramic honey comb matrix of the invention is 9.1W/ (mK), and 1000 DEG C~room temperature anti-thermal shock is followed
Ring does not crack for 10 times.The thermal storage density of the compound heat accumulation ceramics of sensible heat-latent heat of the present invention is 1580kJ/kg (room temperature~1000
DEG C), 1000 DEG C~room temperature thermal cycle 100 times, without chemical reaction, meets too without cracking, alloy No leakage, alloy with ceramic matrix
The performance requirement of the positive heat accumulating that hot can generate electricity.
Claims (10)
- A kind of 1. compound heat accumulation ceramics of inexpensive solar energy thermal-power-generating sensible heat-latent heat, it is characterised in that：The compound heat accumulation pottery Porcelain is obtained by encapsulating latent heat alloy powder in the sensible heat ceramic matrix of honeycomb；The raw material and mass percent of the sensible heat ceramic matrix be：Coaseries kaolin 65~70%, aluminium powder 30~35%；Latent heat alloy powder loadings account for the 2/3~3/4 of sensible heat ceramic matrix pore volume in the compound heat accumulation ceramics.
- 2. the compound heat accumulation ceramics of inexpensive solar energy thermal-power-generating sensible heat-latent heat according to claim 1, its feature exist In：The latent heat alloy powder is Al-Si alloy powders.
- 3. the preparation side of the inexpensive compound heat accumulation ceramics of solar energy thermal-power-generating sensible heat-latent heat described in a kind of right and 1 or 2 Method, it is characterised in that step is as follows：1) sensible heat ceramic matrix is prepared：Ball milling, sieving are distinguished after Coaseries kaolin and aluminium powder are weighed in proportion, is subsequently placed in and pinches Mixture is mixed to get in conjunction machine, binding agent, lubricant and water are added in mixture and is uniformly mixed, then is practiced with vacuum deairing machine Mud, aging good pug is obtained through aging, and aging good pug is extruded by extruder, cuts and obtains ceramic honey comb base substrate, Then shape through microwave, is dry, then sensible heat ceramic base will be fired into saggar of the ceramic honey comb base substrate embedment equipped with graphite powder Body；2) the compound heat accumulation ceramics of solar energy thermal-power-generating sensible heat-latent heat are prepared：By sensible heat ceramic matrix through hole one end obtained by step 1) Coating encapsulation pug, latent heat alloy powder is inserted in dry backward through hole and with encapsulating the pug package via other end, re-dry The honeycomb ceramic body of encapsulation latent heat alloy powder is obtained afterwards, and finally honeycomb ceramic body is carried out to be thermally treated resulting in solar energy thermal-power-generating The compound heat accumulation ceramics of sensible heat-latent heat.
- 4. preparation method according to claim 3, it is characterised in that the step 1) sieving was 250~325 mesh sieves.
- 5. preparation method according to claim 3, it is characterised in that the step 1) binding agent is carboxymethyl cellulose, gathers One or more mixtures in vinyl alcohol, waterglass, addition are the 3~5% of mixture quality；The lubricant is paulownia The mixture of one or both of oil, soya-bean oil, addition are the 4~6% of mixture quality；The addition of water is mixture matter The 16~22% of amount.
- 6. preparation method according to claim 3, it is characterised in that step 1) the extruder extrusion pressure for 2~ 4MPa。
- 7. preparation method according to claim 3, it is characterised in that step 1) the microwave setting process condition is：Microwave Power is 5KW, and frequency is 2450 ± 50MHz, and microwave setting time is 5~10min.
- 8. preparation method according to claim 3, it is characterised in that step 1) the firing process condition is：At room temperature with The heating rate of 3~5 DEG C/min is warming up to 1450~1550 DEG C, keeps the temperature 2~3h.
- 9. preparation method according to claim 3, it is characterised in that step 2) it is described encapsulation pug preparation method be：A) raw material is weighed by following mass percent：Ceramic honey comb powder 60~70%, antiflux 30~40%, by raw material point 250~325 mesh sieves are crossed after other ball milling, remix to obtain mixed powder, wherein the ceramic honey comb powder raw material and mass ratio are： Coaseries kaolin 65~70%, aluminium powder 30~35%；The antiflux is waste glass powder or melts one kind in the block；B) adhesive solution is added into mixed powder obtained by step a), 10~20min is mediated and obtains encapsulation pug.
- 10. preparation method according to claim 3, it is characterised in that the step 2) heat treatment condition is：With 5~ The speed of 8 DEG C/min is warming up to 900~950 DEG C, keeps the temperature 20~40min.
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