CN107556028A - A kind of preparation method of mullite fiber high temperature insulating watt - Google Patents
A kind of preparation method of mullite fiber high temperature insulating watt Download PDFInfo
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- CN107556028A CN107556028A CN201710631442.XA CN201710631442A CN107556028A CN 107556028 A CN107556028 A CN 107556028A CN 201710631442 A CN201710631442 A CN 201710631442A CN 107556028 A CN107556028 A CN 107556028A
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Abstract
The present invention relates to a kind of preparation method of ceramic fibre thermal insulation tile.Shear treatment is carried out to ceramic fibre using fiber disintegrating apparatus, obtains chopped strand；Condensed type dimethyl silicone rubber and dimethicone are mixed, obtain premixing colloid；Mullite fiber is added, obtains fibre stuff；Initiator is added into slurry, slurry is poured into suction filtration processing is carried out in pumping and filtering device；First demoulding redrying of drying is carried out to wet base to handle, and obtains dry base substrate；Base substrate is put into high temperature furnace and carries out dumping and sintering, obtains ceramic fibre thermal insulation tile.Thermal insulation tile density is 0.29g/cm3~0.53g/cm3, compression strength reaches 0.7MPa~1.9MPa, and heatproof reaches 1500 DEG C, and binding agent has preferable cladding to fiber.Binding agent in mullite fiber thermal insulation tile preparation process is overcome to disperse the problem of not in place.Mullite fiber thermal insulation tile can bear 1500 DEG C of high temperature, available for hypersonic aerospace craft.
Description
Technical field
The invention belongs to ceramic matric composite field, a kind of preparation side of mullite fiber high temperature insulating watt of specific design
Method, the method that more particularly to a kind of high polymer gel shaping prepares mullite fiber high temperature insulating watt.
Background technology
In recent years, High Mach number, high accuracy, long cruising time and progressively become newer versions of these missiles and reuse space flight fly
The developing direction of row device, in the military developments in future, newer versions of these missiles and reuse aerospace craft will turn into enhancing state
The development priority of family's military competition power.Compared with furnished guided missile and aircraft, newer versions of these missiles and reuse space travel
Device keeps High Mach number and flying for long time, inevitably needs to face increasingly severe Aerodynamic Heating phenomenon, bears to get over
Carry out higher environment temperature.Higher requirement is proposed to thermal protection system for this, it is necessary to which to develop effect of heat insulation more outstanding
Heat-resistant light heat-barrier material.Mullite fiber base rigid porous materials have low lightweight, high temperature resistant, thermal conductivity, non-oxidation, resistance to
The advantages that corrosion, vital effect is played in the thermal insulation layer of all kinds of aerospace crafts.
At present, traditional ablative-type protective coating thermally protective materials have been difficult to meet reusable demand, and the quartz being on active service is fine
The temperature in use (1200 DEG C of highest) of Wiki porous material is relatively low, can not meet newer versions of these missiles and reuse aerospace craft pair
The requirement of heat resistance.Therefore, there is outstanding high-temperature stability, low thermal conductivity and more operation at high temperature (1500 DEG C of highest)
Mullite fiber based porous materials turn into aircraft thermal insulation layer optimal selection.
Mullite fiber porous material is prepared, the selection of binding agent is particularly significant, is related to the mechanical performance, heat-insulated of sample
Performance etc..Currently used Binder Composition has SiO2、B2O3And its compound system.B2O3Binding agent forms liquid in sintering process
Phase, its mobility and uniformly being sprawled in fiber surface makes fiber obtain good parcel, and make to have obtained well between fiber
Bond, form firm three-dimensional cavernous structure, but B2O3Temperature tolerance is poor, and volatile under high temperature, loses cementation.
SiO2Binding agent has good temperature tolerance, high temperatures, and can improve the mechanical strength of matrix to a certain extent, still
The SiO that conventional method uses2Binding agent sprawls poor effect mullite fiber surface, fiber can not be securely bonded to
Together, the bonding point during load is born is caused to be easy to be broken.
The content of the invention
It is an object of the invention to develop a kind of method to solve to bond in existing mullite fiber thermal insulation tile preparation process
Agent disperses technical problem not in place, there is provided a kind of preparation method of mullite fiber high temperature insulating watt, has selected and has been chopped not come
Mineral wool is as raw material, and condensed type dimethyl silicone rubber is as bonding agent, and dimethicone is as diluent, ammonium persulfate
(APS) initiator is used as, using in-situ solidifying and moulding process is filtered, it is high to prepare the excellent three-dimensional mullite fiber of space structure
Warm heat-barrier material.Wherein, condensed type dimethyl silicone rubber is uniformly attached on fiber surface in fiber scatter stage can, ensures
Binding agent is uniformly distributed, and in the drying process due to initiator ammonium persulfate (APS) addition, promotes condensed type dimethyl-silicon
The gel of rubber realizes in-situ solidifying, and uniform and stable overlapped points are formed between fiber and fiber, and fine in sintering process
Silicon rubber at dimension table face and overlapped points can react, and generate SiO2, and in high-temperature process stage SiO2Glass phase can be given birth to,
So that overlapped points are densified, the mechanical strength of matrix is added to a certain extent, and other performances are also more stable.
Technical scheme is as follows:
A kind of preparation method of mullite fiber high temperature insulating watt, comprises the following steps：
(1) mullite long fibre is carried out using fiber disintegrating apparatus cutting short processing, by regulating and controlling grinding time realization pair
The control of fibre length, obtain mullite chopped strand；
(2) condensed type dimethyl silicone rubber is used, using dimethicone as diluent, the two to be mixed as bonding agent
Close uniformly, in 40 DEG C~60 DEG C stirring in water bath 1h~2h, obtain premixing colloid；
(3) take the mullite chopped strand prepared in step (1), take the premix colloid obtained in step (2), 40 DEG C~
During 60 DEG C of stirring in water bath, mullite chopped strand is added into premix colloid, by stirring, until fiber is completely dispersed,
The suspended state of fiber is realized, uniform me fibrous slurry is made；
(4) ammonium persulfate is added dropwise in obtained me fibrous slurry into step (3), stirs；
(5) assembling vacuum filtration equipment, obtained slurry in step (4) is at the uniform velocity poured into mould, and standing 3min~
5min, unnecessary colloid is discharged by filtering processing, obtains wet base；
(6) the wet base obtained in step (5) is put into electronic thermostatic drying cabinet with mould and carried out at preliminarily dried
Reason, it is stripped after preliminarily dried processing, base substrate is then put into progress redrying processing in electronic thermostatic drying cabinet；
(7) base substrate in step (6) after drying process is put into high temperature furnace and carries out dumping and sintering, obtain mullite
Fiber high temperature thermal insulation tile.
Preferable shear time is 4min~6min in the step (1), and the length of chopped strand is 400 μm~600 μm.
It is condensed type dimethyl silicone rubber that colloid is preferably premixed in the step (2) by mass ratio：Dimethicone=
100：The component composition of (45~75).
The mass ratio of preferable mullite chopped strand and premix colloid is (20~40) in the step (3)：100.
The preferred strong stirring time is 2h~4h in the step (3).
The initiator quality ratio preferably added in the step (4) is condensed type dimethyl silicone rubber：Ammonium persulfate=
100:(1~2).
The preferred vacuum filtration time is 10min~20min in the step (5).
Preferable initial drying time is 2h~3h in the step (6), and temperature is 70 DEG C~80 DEG C.
The preferred redrying time is 6h~10h in the step (6), and temperature is 140 DEG C~150 DEG C.
Preferable sintering schedule control is to be heated to 2 DEG C/min~3 DEG C/min heating rate in the step (7)
500 DEG C~700 DEG C, then 1300 DEG C~1500 DEG C are heated to 5 DEG C/min~7 DEG C/min heating rate, it is incubated 2h~4h.
The present invention passes through preferred condensed type dimethyl silicone rubber and the proportioning of dimethicone and the matter of mullite fiber
Fraction is measured, and improves the degree of scatter of fiber in preparation process, wet base in-situ solidifying is adjusted and filters shaping, drying process and height
The process procedures such as temperature sintering, preparation technology is set to be applied to prepare the high temperature resistant rigidity thermal insulation tile that mullite fiber is matrix.This hair
The density of the mullite fiber porous heat-insulating watt of bright preparation is in 0.29g/cm3~0.53g/cm3Between, compression strength reaches
0.7MPa~1.9MPa, heatproof reach 1500 DEG C, and binding agent has preferable cladding to fiber.In the present invention, condensed type diformazan
Base silicon rubber can uniformly be attached on fiber surface as binding agent in fiber scatter stage, can be in fiber in formative stage
Overlapped points form node, in high-temperature process, binding agent reaction generation SiO2, and melt, formed the fiber of densification-
Fiber nodes, so as to play a part of connecting fiber and rigidity of support textile porous materials.
Compared with existing mullite fiber thermal insulation tile preparation method, this invention overcomes Mullite Ceramic Fibres thermal insulation tile
The poor technical problem of binding agent dispersiveness, realizes cladding of the binding agent to fiber, node is formed uniformly in overall structure,
And the performance of Mullite Ceramic Fibres thermal insulation tile is optimized to a certain extent.The condensed type dimethyl silicone rubber binding agent of use
Compared to conventional binders, the effect of low temperature and high-temperature agglomerant can be played simultaneously, thermal insulation tile heat resistance is carried by 1200 DEG C
Height makes binding agent have good cladding to mullite fiber to 1500 DEG C, and mechanical property significantly improves.Such a thermal insulation tile
Binding agent is evenly distributed in structure, covered fiber that can be good, and high temperature stability performance is outstanding, and it is fine can to play fixed and overlap joint
The effect of dimension.Mullite fiber high temperature insulating watt prepared by the present invention can bear 1500 DEG C of high temperature, available for hypersonic space flight
The thermal insulation layer of aircraft fuselage.
Brief description of the drawings
Fig. 1 is the electron scanning picture of mullite fiber high temperature insulating watt prepared by embodiment 1.
Fig. 2 is the electron scanning picture of mullite fiber high temperature insulating watt prepared by embodiment 2.
Fig. 3 is the electron scanning picture of mullite fiber high temperature insulating watt prepared by embodiment 3.
Embodiment
For a better understanding of the present invention, with reference to the embodiment content that the present invention is furture elucidated, but the present invention
Optimum condition content is not limited solely to the embodiment.
A kind of preparation method of mullite fiber high temperature insulating watt, comprises the following steps：
(1) mullite long fibre is carried out using fiber disintegrating apparatus cutting short processing, shear time is 4min~6min, is obtained
To the chopped mullite fiber that length is 400 μm~600 μm；
(2) condensed type dimethyl silicone rubber is used as bonding agent, using dimethicone as diluent, according to condensation
Type dimethyl silicone rubber：Dimethicone=100：The mass ratio of (45~75) is well mixed, and is stirred in 40 DEG C~60 DEG C water-baths
1h~2h is mixed, obtains premixing colloid；
(3) it is (20~40) according to the mass ratio of mullite chopped strand and premix colloid：100, take in step (1) and prepare
Mullite chopped strand, the premix colloid obtained in step (2) is taken, during 40 DEG C~60 DEG C stirring in water bath, to premix
Mullite chopped strand is added in colloid, by 2h~4h strong stirrings, until fiber is completely dispersed, uniform fiber material is made
Slurry；
(4) ammonium persulfate (APS) is added dropwise in obtained me fibrous slurry into step (3), mass ratio is condensed type dimethyl
Silicon rubber：Ammonium persulfate (APS)=100：(1~2), stirs；
(5) assembling vacuum filtration equipment, the slurry mixed in step (4) is at the uniform velocity poured into mould, and standing 3min~
5min, unnecessary colloid is discharged by filtering processing, the suction filtration time is 10min~20min, obtains wet base；
(6) the wet base obtained in step (5) is put into electronic thermostatic drying cabinet at 70 DEG C~80 DEG C with mould
Preliminarily dried processing is carried out, the time is 2h~3h, is then stripped, continues base substrate being put into electronic thermostatic drying cabinet
Redrying processing is carried out at 140 DEG C~150 DEG C, the time is 6h~10h；
(7) base substrate in step (6) after drying process is put into high temperature furnace and carries out dumping and sintering, temperature increasing schedule control
It is made as being heated to 500 DEG C~700 DEG C, then the heating with 5 DEG C/min~7 DEG C/min with 1 DEG C/min~2 DEG C/min heating rate
Speed is heated to 1300 DEG C~1500 DEG C, is incubated 2h~4h, obtains mullite fiber thermal insulation tile.
Embodiment 1：
A kind of preparation method of mullite fiber high temperature insulating watt of the present embodiment, is specifically followed the steps below：
(1) mullite long fibre is carried out using fiber disintegrating apparatus cutting short processing, shear time 6min, obtains length
For 400 μm of chopped mullite fiber；
(2) condensed type dimethyl silicone rubber is used as bonding agent, using dimethicone as diluent, according to condensation
Type dimethyl silicone rubber：Dimethicone=100：75 mass ratio is well mixed, and in 40 DEG C of stirring in water bath 2h, is premixed
Colloid；
(3) it is 40 according to the mass ratio of mullite chopped strand and premix colloid：100, take what is prepared in step (1) not come
Stone chopped strand, the premix colloid obtained in step (2) is taken, during 40 DEG C of stirring in water bath, added not into premix colloid
Carry out stone chopped strand, by 4h strong stirrings, until fiber is completely dispersed, uniform me fibrous slurry is made；
(4) ammonium persulfate (APS) is added dropwise in obtained me fibrous slurry into step (3), mass ratio is condensed type dimethyl
Silicon rubber：Ammonium persulfate (APS)=100:2, stir；
(5) assembling vacuum filtration equipment, the slurry mixed in step (4) is at the uniform velocity poured into mould, stands 5min, is led to
Cross and filter the unnecessary colloid of processing discharge, the suction filtration time is 20min, obtains wet base；
(6) the wet base obtained in step (5) is put into electronic thermostatic drying cabinet with mould and carried out just at 80 DEG C
Drying process is walked, time 3h, is then stripped, continues base substrate being put into electronic thermostatic drying cabinet and is carried out at 150 DEG C
Redrying processing, time 10h；
(7) base substrate in step (6) after drying process is put into high temperature furnace and carries out dumping and sintering, temperature increasing schedule control
It is made as being heated to 700 DEG C with 2 DEG C/min heating rate, then 1500 DEG C is heated to 5 DEG C/min heating rate, is incubated 2h,
Obtain mullite fiber high temperature insulating watt.Sample density is 0.51g/cm3, compression strength reaches 1.7MPa, and heatproof reaches 1500
DEG C, binding agent has preferable cladding to fiber.
The electron scanning picture of mullite fiber high temperature insulating watt manufactured in the present embodiment is as shown in Figure 1.
Embodiment 2：
A kind of preparation method of mullite fiber high temperature insulating watt of the present embodiment, is specifically followed the steps below：
(1) mullite long fibre is carried out using fiber disintegrating apparatus cutting short processing, shear time 5min, obtains length
For 500 μm of chopped mullite fiber；
(2) condensed type dimethyl silicone rubber is used as bonding agent, using dimethicone as diluent, according to condensation
Type dimethyl silicone rubber：Dimethicone=100：60 mass ratio is well mixed, and in 50 DEG C of stirring in water bath 2h, is premixed
Colloid；
(3) it is 30 according to the mass ratio of mullite chopped strand and premix colloid：100, take what is prepared in step (1) not come
Stone chopped strand, the premix colloid obtained in step (2) is taken, during 50 DEG C of stirring in water bath, added not into premix colloid
Carry out stone chopped strand, by 3h strong stirrings, until fiber is completely dispersed, uniform me fibrous slurry is made；
(4) appropriate ammonium persulfate (APS) is added dropwise in obtained me fibrous slurry into step (3), mass ratio is condensed type
Dimethyl silicone rubber：Ammonium persulfate (APS)=100:2, stir；
(5) assembling vacuum filtration equipment, the slurry mixed in step (4) is at the uniform velocity poured into mould, stands 4min, is led to
Cross and filter the unnecessary colloid of processing discharge, the suction filtration time is 15min, obtains wet base；
(6) the wet base obtained in step (5) is put into electronic thermostatic drying cabinet with mould and carried out just at 80 DEG C
Drying process is walked, time 3h, is then stripped, continues base substrate being put into electronic thermostatic drying cabinet and is carried out at 140 DEG C
Redrying processing, time 8h；
(7) base substrate in step (6) after drying process is put into high temperature furnace and carries out dumping and sintering, temperature increasing schedule control
It is made as being heated to 500 DEG C with 2 DEG C/min heating rate, then 1500 DEG C is heated to 7 DEG C/min heating rate, is incubated 3h,
Obtain mullite fiber high temperature insulating watt.Sample density is 0.41g/cm3, compression strength reaches 1.4Mpa, and heatproof reaches 1500
DEG C, binding agent has preferable cladding to fiber.
The electron scanning picture of mullite fiber high temperature insulating watt manufactured in the present embodiment is as shown in Figure 2.
Embodiment 3：
A kind of preparation method of mullite fiber high temperature insulating watt of the present embodiment, is specifically followed the steps below：
(1) mullite long fibre is carried out using fiber disintegrating apparatus cutting short processing, shear time 4min, obtains length
For 600 μm of chopped mullite fiber；
(2) condensed type dimethyl silicone rubber is used as bonding agent, using dimethicone as diluent, according to condensation
Type dimethyl silicone rubber：Dimethicone=100：45 mass ratio is well mixed, and in 60 DEG C of stirring in water bath 1h, is premixed
Colloid；
(3) it is 20 according to the mass ratio of mullite chopped strand and premix colloid：100, take what is prepared in step (1) not come
Stone chopped strand, the premix colloid obtained in step (2) is taken, during 50 DEG C of stirring in water bath, added not into premix colloid
Carry out stone chopped strand, by 1h strong stirrings, until fiber is completely dispersed, uniform me fibrous slurry is made；
(4) appropriate ammonium persulfate (APS) is added dropwise in obtained me fibrous slurry into step (3), mass ratio is condensed type
Dimethyl silicone rubber：Ammonium persulfate (APS)=100:1, stir；
(5) assembling vacuum filtration equipment, the slurry mixed in step (4) is at the uniform velocity poured into mould, stands 3min, is led to
Cross and filter the unnecessary colloid of processing discharge, the suction filtration time is 10min, obtains wet base；
(6) the wet base obtained in step (5) is put into electronic thermostatic drying cabinet with mould and carried out just at 70 DEG C
Drying process is walked, time 2h, is then stripped, continues base substrate being put into electronic thermostatic drying cabinet and is carried out at 140 DEG C
Redrying processing, time 6h；
(7) base substrate in step (6) after drying process is put into high temperature furnace and carries out dumping and sintering, temperature increasing schedule control
It is made as being heated to 600 DEG C with 3 DEG C/min heating rate, then 1300 DEG C is heated to 5 DEG C/min heating rate, is incubated 2h,
Obtain mullite fiber high temperature insulating watt.Sample density is 0.29g/cm3, compression strength reaches 0.7MPa, and heatproof reaches 1500
DEG C, binding agent has preferable cladding to fiber.
The electron scanning picture of mullite fiber high temperature insulating watt manufactured in the present embodiment is as shown in Figure 3.
Claims (10)
1. a kind of preparation method of mullite fiber high temperature insulating watt, it is characterised in that comprise the following steps：
(1) mullite long fibre is carried out using fiber disintegrating apparatus cutting short processing, realized by regulating and controlling grinding time to fiber
The control of length, obtain mullite chopped strand；
(2) condensed type dimethyl silicone rubber is used, using dimethicone as diluent, the two to be mixed equal as bonding agent
It is even, in 40 DEG C~60 DEG C stirring in water bath 1h~2h, obtain premixing colloid；
(3) the mullite chopped strand prepared in step (1) is taken, the premix colloid obtained in step (2) is taken, at 40 DEG C~60 DEG C
During stirring in water bath, mullite chopped strand is added into premix colloid, by stirring, until fiber is completely dispersed, is realized
The suspended state of fiber, uniform me fibrous slurry is made；
(4) ammonium persulfate is added dropwise in obtained me fibrous slurry into step (3), stirs；
(5) assembling vacuum filtration equipment, obtained slurry in step (4) is at the uniform velocity poured into mould, stands 3min~5min, is led to
Cross and filter the unnecessary colloid of processing discharge, obtain wet base；
(6) the wet base obtained in step (5) is put into progress preliminarily dried processing in electronic thermostatic drying cabinet with mould, just
It is stripped after step drying process, base substrate is then put into progress redrying processing in electronic thermostatic drying cabinet；
(7) base substrate in step (6) after drying process is put into high temperature furnace and carries out dumping and sintering, obtain mullite fiber
High temperature insulating watt.
2. according to the method for claim 1, it is characterised in that the shear time in step (1) is 4min~6min, is chopped
The length of fiber is 400 μm~600 μm.
3. according to the method for claim 1, it is characterised in that premix colloid in step (2) is condensed type two by mass ratio
Methyl silicone rubber：Dimethicone=100：The component composition of (45~75).
4. according to the method for claim 1, it is characterised in that mullite chopped strand and premix colloid in step (3)
Mass ratio is (20~40)：100.
5. according to the method for claim 1, it is characterised in that the strong stirring time is 2h~4h in step (3).
6. according to the method for claim 1, it is characterised in that the initiator quality ratio of addition is condensed type two in step (4)
Methyl silicone rubber：Ammonium persulfate=100:(1~2).
7. according to the method for claim 1, it is characterised in that the vacuum filtration time is 10min~20min in step (5).
8. according to the method for claim 1, it is characterised in that the initial drying time in step (6) is 2h~3h, temperature
For 70 DEG C~80 DEG C.
9. according to the method for claim 1, it is characterised in that the redrying time is 6h~10h in step (6), and temperature is
140 DEG C~150 DEG C.
10. according to the method for claim 1, it is characterised in that the control of sintering schedule in step (7) be with 2 DEG C/min~
3 DEG C/min heating rate is heated to 500 DEG C~700 DEG C, then is heated to 1300 with 5 DEG C/min~7 DEG C/min heating rate
DEG C~1500 DEG C, it is incubated 2h~4h.
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Cited By (6)
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|---|---|---|---|---|
| CN110894157A (en) * | 2018-09-12 | 2020-03-20 | 揖斐电株式会社 | Method for manufacturing honeycomb structure |
| CN110963779A (en) * | 2019-10-26 | 2020-04-07 | 辽宁科技大学 | Dispersing method for adding mullite cellucotton into purple sand pug |
| CN111039681A (en) * | 2018-10-14 | 2020-04-21 | 天津大学青岛海洋技术研究院 | Simple method for preparing mullite fiber-based porous heat insulation tile |
| CN111410843A (en) * | 2020-04-15 | 2020-07-14 | 贵州大学 | Preparation method of silicone rubber composite material with vibration fireproof performance |
| CN113735555A (en) * | 2020-05-28 | 2021-12-03 | 深圳市合元科技有限公司 | Porous body, preparation method thereof and electronic cigarette using porous body |
| CN117342880A (en) * | 2023-12-04 | 2024-01-05 | 乌镇实验室 | Continuous wet forming method for special-shaped surface ceramic fiber rigid heat-insulating tile |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106673598A (en) * | 2017-01-05 | 2017-05-17 | 天津大学 | Preparation method of high temperature-resisting mullite fiber porous heat insulation tile |
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2017
- 2017-07-28 CN CN201710631442.XA patent/CN107556028B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106673598A (en) * | 2017-01-05 | 2017-05-17 | 天津大学 | Preparation method of high temperature-resisting mullite fiber porous heat insulation tile |
Cited By (9)
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|---|---|---|---|---|
| CN110894157A (en) * | 2018-09-12 | 2020-03-20 | 揖斐电株式会社 | Method for manufacturing honeycomb structure |
| US11511459B2 (en) | 2018-09-12 | 2022-11-29 | Ibiden Co., Ltd. | Method of producing honeycomb structured body |
| CN111039681A (en) * | 2018-10-14 | 2020-04-21 | 天津大学青岛海洋技术研究院 | Simple method for preparing mullite fiber-based porous heat insulation tile |
| CN110963779A (en) * | 2019-10-26 | 2020-04-07 | 辽宁科技大学 | Dispersing method for adding mullite cellucotton into purple sand pug |
| CN111410843A (en) * | 2020-04-15 | 2020-07-14 | 贵州大学 | Preparation method of silicone rubber composite material with vibration fireproof performance |
| CN111410843B (en) * | 2020-04-15 | 2022-04-15 | 贵州大学 | Preparation method of silicone rubber composite material with vibration fireproof performance |
| CN113735555A (en) * | 2020-05-28 | 2021-12-03 | 深圳市合元科技有限公司 | Porous body, preparation method thereof and electronic cigarette using porous body |
| CN117342880A (en) * | 2023-12-04 | 2024-01-05 | 乌镇实验室 | Continuous wet forming method for special-shaped surface ceramic fiber rigid heat-insulating tile |
| CN117342880B (en) * | 2023-12-04 | 2024-04-02 | 乌镇实验室 | Continuous wet forming method for special-shaped surface ceramic fiber rigid heat-insulating tile |
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