CN109369153A - A kind of high resistance to compression integration thermally protective materials of high emission and preparation method thereof - Google Patents
A kind of high resistance to compression integration thermally protective materials of high emission and preparation method thereof Download PDFInfo
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- CN109369153A CN109369153A CN201811421899.9A CN201811421899A CN109369153A CN 109369153 A CN109369153 A CN 109369153A CN 201811421899 A CN201811421899 A CN 201811421899A CN 109369153 A CN109369153 A CN 109369153A
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- C03C3/076—Glass compositions containing silica with 40% to 90% silica, by weight
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Abstract
The present invention relates to a kind of high resistance to compression integration thermally protective materials of high emission, it is characterised in that using high modulus fibre felt as skeletal support, fills high compressive strength, lower thermal conductivity C-Al2O3Aeroge, surface are high emissivity coating.Using sol-gel method combination CO 2 supercritical dry technology and high-temperature heat treatment process, C-Al is filled inside high modulus fibre felt2O3Aeroge forms high compressive strength basis material；Molybdenum disilicide-aluminium borosilicate glass high emissivity coating is prepared on its surface using slurry spraying and quick heat treatment method again, forms the high resistance to compression integration thermally protective materials of high emission.The integrated material can bear 1200 DEG C of high temperature, and density is only 0.25-0.36g/cm3, emissivity is all larger than 0.8 in 0.3-2.5 μ m wavelength range, can Net long wave radiation heat, internal C-Al2O3The high modulus fibre felt of aeroge filling has 0.035-0.050Wm‑1·K‑1Lower thermal conductivity and 6-9MPa high compressive strength.
Description
Technical field
The invention belongs to anti-heat-barrier material preparation fields, and in particular to a kind of high resistance to compression integration thermally protective materials of high emission
And preparation method thereof.
Background technique
For reusable sky and space plane, when transmitting and atmospheric reentry, surface is due to violent Aerodynamic Heating
The superhigh temperature that problem makes it bear 1000 DEG C or more.The accumulation of high temperature causes grave danger to organism safe, under space environment,
High-emissivity material with excellent radiance becomes the thermally protective materials of great application value.Meanwhile space or closing on sky
Between harsh environment specific and urgent high pouring is proposed to body surface thermally protective materials.It grinds extensively both at home and abroad before this
The thermally protective materials studied carefully have the defects of emissivity is low, compression strength is poor, thermal conductivity is high, reusable performance is insufficient mostly.
And C-Al2O3Aeroge fills high modulus fibre felt and the advantages such as leads with high resistance to compression, low-density, low-heat, the height based on this preparation
Emissivity integration thermally protective materials, have both high radiance and high compressive strength, it is made effectively to meet complex space environment heat
Protection requirements.
Summary of the invention
Technology of the invention solves the problems, such as: a kind of high resistance to compression one of high emission is provided to improve the deficiencies in the prior art
Body thermally protective materials and preparation method thereof, the present invention also provides the preparation methods of above-mentioned material；The present invention is reusable
1200 DEG C of integrated thermally protective materials are born on sky and space plane surface, while having high emissivity and high compressive strength, are played fast
Fast radiation surface area amount of stored heat and the effect for adapting to complex space environment.
The technical solution of the present invention is as follows: a kind of high resistance to compression integration thermally protective materials of high emission, it is characterised in that with Gao Mo
Amount fibrofelt is skeletal support, fills high compressive strength, lower thermal conductivity aeroge, and surface is that aluminium enhances the painting of high emissivity silicide
Layer；Wherein the high compressive strength, lower thermal conductivity aeroge are C-Al2O3Composite aerogel；The aluminium enhances high emissivity
Silicide coating is 10-30%MoSi by quality percentage amounts2The aluminium borosilicate glass group for being 70-90% with quality percentage amounts
At.
It is preferred that the high modulus fibre felt is carbon fiber felt, silicon carbide fibre felt or graphite fibre felt.
It is preferred that the component of aluminium borosilicate glass and the quality percentage amounts of each component is respectively as follows: the Al of 3-5%2O3,
The SiO of 70-80%2With the Na of 15-25%2B4O7·10H2O。
It is preferred that the apparent density 0.25-0.36g/cm of the high resistance to compression integration thermally protective materials of high emission3；Inside every
Hot material compression strength is 6-9MPa, thermal conductivity 0.033-0.050Wm-1·K-1, surface covering emissivity is 0.8-0.9.
The present invention also provides the preparation method of the high resistance to compression integration thermally protective materials of high emission that can be above-mentioned, specific steps
It is as follows:
(1) preparation of the high modulus fibre felt of aeroge filling: using high modulus fibre felt as reinforcement, with resorcinol-
Formalin (RF) is carbon source, and inorganic aluminate is silicon source, and epoxides is network former, after mixing, through sol-gel
Process, aging, solvent displacement and supercritical drying, then the height of aeroge filling is obtained after inert gas shielding heat treatment process
Modulus fibre felt；
(2) preparation of aluminium borosilicate glass: the glass raw material of different quality percentage is weighed respectively, is placed in mixing tank
In, it is uniformly mixed with batch mixer；Platinum crucible equipped with powder is placed in 1400-1600 DEG C of furnace and is kept the temperature 3-4h, is quickly taken
Chilling into the water after out, obtains aluminium borosilicate glass frit, is placed in vibromill, broken to obtain aluminium borosilicate glass
Powder is placed in spare in drier；
(3) weighing molybdenum disilicide that mass percent is 10-30% and mass percent is 70-90% aluminium pyrex
It is placed in ball grinder, using ethyl alcohol as solution, dispersing agent is added, carries out ball milling mixing processing, obtains coating paste；
(4) preparation of coating: the slurry in step (3) is sprayed in step (1) using the method for slurry spraying and is passed through
The aeroge of heat treatment fills high modulus fibre felt surface；
(5) sample sprayed is dried, then sample is placed in 1100-1300 DEG C of furnace, and keep the temperature 15-
30min takes out sample from furnace, obtains the high resistance to compression integration thermally protective materials of high emission.
In preferred steps (1) aeroge filling high modulus fibre felt preparation are as follows: resorcinol, formaldehyde, natrium carbonicum calcinatum,
Ethyl alcohol, deionized water are according to 1:2:(0.004-0.006): (14-18): the molar ratio of (4-6) after mixing, at 15-30 DEG C
At a temperature of uniform stirring it is uniform after obtain resorcinol-formaldehyde (RF) colloidal sol；Inorganic aluminate, deionized water, ethyl alcohol are according to 1:
(40-50): the molar ratio of (8-10) 15-30 DEG C at a temperature of uniformly mix, epoxides is added after cooling and uniformly mixes again
After obtain Aluminum sol, wherein the molar ratio of epoxides and inorganic aluminate be (5-15): 1；By resorcinol-formaldehyde (RF) colloidal sol
With Aluminum sol according to resorcinol-formaldehyde (RF), inorganic aluminate be (0.5-2): 1 molar ratio 15-30 DEG C at a temperature of
Even mixing is then poured into high modulus fibre felt, obtains C-Al after aging and CO 2 supercritical are dry2O3
The gel-filled high modulus fibre felt of precursor gas obtains C-Al after being heat-treated using inert gas argon atmosphere protection2O3Airsetting
The high modulus fibre felt of glue filling；Wherein CO 2 supercritical drying parameter are as follows: pressure 95-105bar, 40-60 DEG C of temperature,
Time 8-10h；Heat treatment parameter are as follows: 1100-1300 DEG C of temperature, time 3-4h, inert protective gas argon gas flow velocity is 100-
150mL/min。
It is preferred that above-mentioned epoxides is ethylene oxide or propylene oxide.
Dispersant solution described in preferred steps (3) be one of sodium carboxymethyl cellulose solution or silica solution or
It is a variety of, concentration 0.01-0.03g/mL；Ethyl alcohol, molybdenum disilicide and the aluminium borosilicate glass mixture of powders, dispersion
The mass ratio of agent solution is 1:(1-2): (0.01-0.03).
The compressed air capacity sprayed in preferred steps (4) is 20-25L/min.
The samples dried system sprayed described in preferred steps (5): being first placed in 45-55 DEG C of oven drying 10-12h, then
The dry 8-10h in 95-105 DEG C of baking oven.
The utility model has the advantages that
The method of the present invention and the high resistance to compression integration thermally protective materials of high emission have a characteristic that
(1) for integrated thermally protective materials temperature tolerance up to 1200 DEG C, apparent density is only 0.25-0.36g/cm3, can be effective
Fuselage weight is reduced, dynamic efficiency is improved.
(2) integrated thermally protective materials emissivity in 0.3-2.5 μ m wavelength range is all larger than 0.8, and radiance is excellent,
Be conducive to Rapid radiating surface heat；Internal C-Al simultaneously2O3The high modulus fibre felt of aeroge filling has 0.035-
0.045W·m-1·K-1Lower thermal conductivity and 6-9MPa high compressive strength, it is suitable can effectively to promote heat insulation and space environment
Ying Xing.
(3) method is simple, low in cost.This method reduces production cost using cheap inorganic aluminate as silicon source；It adopts simultaneously
Integrated thermally protective materials are prepared with the method that slurry spraying combines rapid thermal treatment, coating thickness is easily controllable, whole to prepare
Period is short, is conducive to improving production efficiency.
Detailed description of the invention
Fig. 1 is the high resistance to compression integration thermally protective materials macroscopic view sample drawing of high emission made from example 1.
Specific embodiment
Example 1
(1) preparation of the high modulus fibre felt of aeroge filling: carbon fiber felt is placed in concora crush under smooth weight and is obtained afterwards for 24 hours
Concora crush Treatment of Carbon felt.Resorcinol, formaldehyde, natrium carbonicum calcinatum, ethyl alcohol, deionized water are rubbed according to 1:2:0.005:16:5's
Your ratio after mixing, 25 DEG C at a temperature of uniform stirring after obtain resorcinol-formaldehyde (RF) colloidal sol；Six chloride hydrates
Aluminium, deionized water, ethyl alcohol according to 1:45:9 molar ratio 25 DEG C at a temperature of uniformly mix, propylene oxide is added again after cooling
Obtain Aluminum sol after evenly mixing, the molar ratio of oxypropylene and aluminium chloride is 10:1.By the two according to resorcinol-first
Aldehyde (RF), inorganic aluminate be 1:1 molar ratio 25 DEG C at a temperature of uniformly mix, be then poured into carbon fiber felt,
After placing 12h in 50 DEG C of baking ovens, ethyl alcohol aging is added, continues plus ethyl alcohol carries out solvent in 50 DEG C of baking ovens and replaces 5 times, every
It is primary for 24 hours.The compound wet gel is dried through CO 2 supercritical, controlled at 50 DEG C, pressure 100bar, is done
The dry time is 9h.It is finally heat-treated under argon atmospher protection, controls 1200 DEG C of heat treatment temperature, gas flow rate 100mL/
C-Al is made in min, heat treatment time 3h2O3The high modulus fibre felt basis material of aeroge filling.
(2) preparation of glass: with silica (SiO2), borax (Na2B4O7·10H2) and aluminium oxide (Al O2O3) it is original
Material is respectively 75%, 20% and 5% weighing according to mass percent, the container equipped with mixture of sealing is placed in batch mixer
Upper mixing is uniformly mixed raw material.Mixed uniformly glass raw material is put into platinum crucible, 3.5h is kept the temperature at 1500 DEG C, fastly
Speed is put into chilling in cold water after taking out, and aluminium borosilicate glass frit is made.Using vibromill grinding 15s, it is crushed to
The aluminium borosilicate glass powder that grain size is 5 μm or so, it is spare to be placed in drier.
(3) preparation of coating: with molybdenum disilicide (MoSi2), aluminium borosilicate glass powder be raw material, according to quality percentage
Than being weighed for 20% and 80%.Load weighted raw material is put into ball grinder, using ethyl alcohol as solution, sodium carboxymethylcellulose is water-soluble
Liquid (0.02g/mL) is dispersing agent, wherein ethyl alcohol, raw material (molybdenum disilicide and aluminium borosilicate glass mixture of powders), dispersing agent
Mass ratio be 1:1.5:0.02.Using planetary ball mill with the revolving speed ball milling 2h of 200rpm, mixed slurry is obtained, wherein ball
Material is than being 2.5:1.Then slurry is sprayed at by C-Al using spray coating method2O3The high modulus fibre felt basis material of aeroge filling
Surface, the compressed air capacity of spraying are 25L/min.Then coated sample is dried to 11h in 50 DEG C of baking oven, then
Baking oven is modulated into 100 DEG C of dry 9h, is then heat-treated 20min in 1200 DEG C of high temperature furnaces, finally the obtained high resistance to compression one of high emission
Body thermally protective materials.
The integration thermally protective materials density is 0.26g/cm3, surface covering emits in 0.3-2.5 μ m wavelength range
Rate is 0.88, internal C-Al2O3The high modulus fibre felt basis material room temperature thermal conductivity of aeroge filling is 0.046Wm-1·K-1, compression strength reach 9MPa.The integration thermally protective materials show high emission, high resistance to compression, high heat-insulated excellent properties.
Example 2
(1) silicon carbide fibre felt the preparation of the high modulus fibre felt of aeroge filling: is placed under smooth weight concora crush for 24 hours
Concora crush is obtained afterwards handles silicon carbide fibre felt.Resorcinol, formaldehyde, natrium carbonicum calcinatum, ethyl alcohol, deionized water are according to 1:2:0.004:
The molar ratio of 14:4 after mixing, 15 DEG C at a temperature of uniform stirring after obtain resorcinol-formaldehyde (RF) colloidal sol；Six water
Close aluminium chloride, deionized water, ethyl alcohol according to 1:40:8 molar ratio 15 DEG C at a temperature of uniformly mix, epoxy is added after cooling
Ethane obtains Aluminum sol after evenly mixing again, and the molar ratio of ethylene oxide and aluminium chloride is 15:1.By the two according to isophthalic
Diphenol-formaldehyde (RF), inorganic aluminate be 0.5:1 molar ratio 15 DEG C at a temperature of uniformly mix, be then poured into carbon
In SiClx fibrofelt, in 50 DEG C of baking ovens place 12h after, be added ethyl alcohol aging, continue plus ethyl alcohol carried out in 50 DEG C of baking ovens it is molten
Agent is replaced 5 times, primary every for 24 hours.The compound wet gel is dried through CO 2 supercritical, controlled at 40 DEG C,
Pressure is 105bar, drying time 8h.It is finally heat-treated under argon atmospher protection, controls 1300 DEG C of heat treatment temperature,
Gas flow rate is 150mL/min, heat treatment time 3h, and C-Al is made2O3The high modulus fibre felt basis material of aeroge filling.
(2) preparation of glass: with silica (SiO2), borax (Na2B4O7·10H2) and aluminium oxide (Al O2O3) it is original
Material is respectively 72%, 25% and 3% weighing according to mass percent, the container equipped with mixture of sealing is placed in batch mixer
Upper mixing is uniformly mixed raw material.Mixed uniformly glass raw material is put into platinum crucible, 3h is kept the temperature at 1600 DEG C, quickly
It is put into chilling in cold water after taking-up, aluminium borosilicate glass frit is made.Using vibromill grinding 15s, it is crushed to particle
The aluminium borosilicate glass powder that size is 5 μm or so, it is spare to be placed in drier.
(3) preparation of coating: with molybdenum disilicide (MoSi2), aluminium borosilicate glass powder be raw material, according to quality percentage
Than being weighed for 10% and 90%.Load weighted raw material is put into ball grinder, using ethyl alcohol as solution, silica solution (0.03g/mL) is
Dispersing agent, wherein ethyl alcohol, raw material (molybdenum disilicide and aluminium borosilicate glass mixture of powders), dispersing agent mass ratio be 1:1:
0.01.Using planetary ball mill with the revolving speed ball milling 2h of 200rpm, mixed slurry is obtained, wherein ratio of grinding media to material is 2.5:1.Then
Slurry is sprayed at by C-Al using spray coating method2O3The compression of the high modulus fibre felt substrate material surface of aeroge filling, spraying is empty
Gas capacity is 20L/min.Then coated sample is dried in 45 DEG C of baking oven to 12h, then baking oven is modulated 95 DEG C and is done
Dry 10h is then heat-treated 15min in 1300 DEG C of high temperature furnaces, finally the obtained high resistance to compression integration thermally protective materials of high emission.
The integration thermally protective materials density is 0.25g/cm3, surface covering emits in 0.3-2.5 μ m wavelength range
Rate is 0.81, internal C-Al2O3The high modulus fibre felt basis material room temperature thermal conductivity of aeroge filling is 0.033Wm-1·K-1, compression strength reach 6MPa.
Example 3
(1) preparation of the high modulus fibre felt of aeroge filling: carbon fiber felt is placed in concora crush under smooth weight and is obtained afterwards for 24 hours
Concora crush Treatment of Carbon felt.Resorcinol, formaldehyde, natrium carbonicum calcinatum, ethyl alcohol, deionized water are rubbed according to 1:2:0.006:18:6's
Your ratio after mixing, 30 DEG C at a temperature of uniform stirring after obtain resorcinol-formaldehyde (RF) colloidal sol；Six chloride hydrates
Aluminium, deionized water, ethyl alcohol according to 1:50:10 molar ratio 30 DEG C at a temperature of uniformly mix, propylene oxide is added after cooling
Obtain Aluminum sol after evenly mixing again, the molar ratio of oxypropylene and aluminium chloride is 5:1.By the two according to resorcinol-
Formaldehyde (RF), inorganic aluminate be 2:1 molar ratio 30 DEG C at a temperature of uniformly mix, be then poured into carbon fiber felt
It is interior, after placing 12h in 50 DEG C of baking ovens, ethyl alcohol aging is added, continues plus ethyl alcohol carries out solvent in 50 DEG C of baking ovens and replaces 5 times,
It is primary every for 24 hours.The compound wet gel is dried through CO 2 supercritical, controlled at 60 DEG C, pressure is
95bar, drying time 10h.It is finally heat-treated under argon atmospher protection, controls 1100 DEG C of heat treatment temperature, gas stream
Speed is 100mL/min, heat treatment time 4h, and C-Al is made2O3The high modulus fibre felt basis material of aeroge filling.
(2) preparation of glass: with silica (SiO2), borax (Na2B4O7·10H2) and aluminium oxide (Al O2O3) it is original
Material is respectively 80%, 15% and 5% weighing according to mass percent, the container equipped with mixture of sealing is placed in batch mixer
Upper mixing is uniformly mixed raw material.Mixed uniformly glass raw material is put into platinum crucible, 4h is kept the temperature at 1400 DEG C, quickly
It is put into chilling in cold water after taking-up, aluminium borosilicate glass frit is made.Using vibromill grinding 15s, it is crushed to particle
The aluminium borosilicate glass powder that size is 5 μm or so, it is spare to be placed in drier.
(3) preparation of coating: with molybdenum disilicide (MoSi2), aluminium borosilicate glass powder be raw material, according to quality percentage
Than being weighed for 30% and 70%.Load weighted raw material is put into ball grinder, using ethyl alcohol as solution, sodium carboxymethylcellulose is water-soluble
Liquid (0.01g/mL) is dispersing agent, wherein ethyl alcohol, raw material (molybdenum disilicide and aluminium borosilicate glass mixture of powders), dispersing agent
Mass ratio be 1:2:0.03.Using planetary ball mill with the revolving speed ball milling 2h of 200rpm, mixed slurry is obtained, wherein ball material
Than for 2.5:1.Then slurry is sprayed at by C-Al using spray coating method2O3The high modulus fibre felt basis material table of aeroge filling
Face, the compressed air capacity of spraying are 25L/min.Then coated sample is dried to 10h in 55 DEG C of baking oven, then will
Baking oven modulates 105 DEG C of dry 8h, is then heat-treated 30min in 1100 DEG C of high temperature furnaces, finally the high resistance to compression one of obtained high emission
Change thermally protective materials.
The integration thermally protective materials density is 0.36g/cm3, surface covering emits in 0.3-2.5 μ m wavelength range
Rate is 0.86, internal C-Al2O3The high modulus fibre felt basis material room temperature thermal conductivity of aeroge filling is 0.050Wm-1·K-1, compression strength reach 8.3MPa.
Claims (10)
1. a kind of high resistance to compression integration thermally protective materials of high emission, it is characterised in that using high modulus fibre felt as skeletal support, fill out
High compressive strength, lower thermal conductivity aeroge are filled, surface is that aluminium enhances high emissivity silicide coating；The wherein high pressure resistance
Degree, lower thermal conductivity aeroge are C-Al2O3Composite aerogel；The aluminium enhancing high emissivity silicide coating is by quality percentage
Amount is 10-30%MoSi2With the aluminium borosilicate glass composition that quality percentage amounts are 70-90%.
2. the high resistance to compression integration thermally protective materials of high emission according to claim 1, it is characterised in that the high-modulus
Fibrofelt is carbon fiber felt, silicon carbide fibre felt or graphite fibre felt.
3. the high resistance to compression integration thermally protective materials of high emission according to claim 1, it is characterised in that the aluminium borosilicate
The component of silicate glass and the quality percentage amounts of each component are respectively as follows: the Al of 3-5%2O3, the SiO of 70-80%2With 15-25%'s
Na2B4O7·10H2O。
4. the high resistance to compression integration thermally protective materials of high emission according to claim 1, it is characterised in that the high emission
The apparent density 0.25-0.36g/cm of high resistance to compression integration thermally protective materials3；Internal insulation material compression strength is 6-9MPa,
Thermal conductivity 0.033-0.050Wm-1·K-1, surface covering emissivity is 0.8-0.9.
5. a kind of method for preparing the high resistance to compression integration thermally protective materials of high emission as described in claim 1, specific steps
It is as follows:
(1) preparation of the high modulus fibre felt of aeroge filling: using high modulus fibre felt as reinforcement, with resorcinol-formaldehyde
Solution is carbon source, and inorganic aluminate is silicon source, and epoxides is network former, after mixing, through sol-gel process, always
Change, solvent displacement and supercritical drying, then the high-modulus fibre of aeroge filling is obtained after inert gas shielding heat treatment process
Tie up felt；
(2) preparation of aluminium borosilicate glass: weighing the glass raw material of different quality percentage respectively, be placed in mixing tank, uses
Batch mixer uniformly mixes；Platinum crucible equipped with powder is placed in 1400-1600 DEG C of furnace and is kept the temperature 3-4h, is put after quickly removing
Enter chilling in water, obtains aluminium borosilicate glass frit, be placed in vibromill, it is broken to obtain aluminium borosilicate glass powder,
It is placed in spare in drier；
(3) weighing molybdenum disilicide that mass percent is 10-30% and mass percent is that 70-90% aluminium pyrex is placed in
In ball grinder, using ethyl alcohol as solution, dispersing agent is added, carries out ball milling mixing processing, obtains coating paste；
(4) preparation of coating: the slurry in step (3) is sprayed in step (1) at through overheat using the method that slurry sprays
The aeroge of reason fills high modulus fibre felt surface；
(5) sample sprayed is dried, then sample is placed in 1100-1300 DEG C of furnace, and keep the temperature 15-30min, from
Sample is taken out in furnace, obtains the high resistance to compression integration thermally protective materials of high emission.
6. according to the method described in claim 5, it is characterized in that aeroge fills the preparation of high modulus fibre felt in step (1)
Are as follows: resorcinol, formaldehyde, natrium carbonicum calcinatum, ethyl alcohol, deionized water are according to 1:2:(0.004-0.006): (14-18): (4-6)
Molar ratio after mixing, obtain resorcinol-formaldehyde colloidal sol after 15-30 DEG C of at a temperature of uniform stirring is uniform；It is inorganic
Aluminium salt, deionized water, ethyl alcohol are according to 1:(40-50): the molar ratio of (8-10) 15-30 DEG C at a temperature of uniformly mix, it is cooling
Epoxides is added afterwards and obtains Aluminum sol after evenly mixing again, wherein the molar ratio of epoxides and inorganic aluminate is (5-15):
1；According to resorcinol-formaldehyde, inorganic aluminate be (0.5-2) by resorcinol-formaldehyde colloidal sol and Aluminum sol: 1 molar ratio exists
It uniformly mixes, is then poured into high modulus fibre felt, by aging and CO 2 supercritical at a temperature of 15-30 DEG C
C-Al is obtained after drying2O3The gel-filled high modulus fibre felt of precursor gas is heat-treated using inert gas argon atmosphere protection
After obtain C-Al2O3The high modulus fibre felt of aeroge filling；Wherein CO 2 supercritical drying parameter are as follows: pressure 95-
105bar, 40-60 DEG C of temperature, time 8-10h；Heat treatment parameter are as follows: 1100-1300 DEG C of temperature, time 3-4h, inertia protects gas
Body argon gas flow velocity is 100-150mL/min.
7. according to the method described in claim 5, it is characterized in that the epoxides is ethylene oxide or propylene oxide.
8. according to the method described in claim 5, it is characterized in that dispersant solution described in step (3) is carboxymethyl cellulose
One of plain sodium water solution or silica solution are a variety of, concentration 0.01-0.03g/mL；The ethyl alcohol, molybdenum disilicide and
Aluminium borosilicate glass mixture of powders, dispersant solution mass ratio be 1:(1-2): (0.01-0.03).
9. according to the method described in claim 5, it is characterized in that the compressed air capacity sprayed in step (4) is 20-
25L/min。
10. according to the method described in claim 5, it is characterized in that the samples dried system sprayed described in step (5): first
It is placed in 45-55 DEG C of oven drying 10-12h, then the dry 8-10h in 95-105 DEG C of baking oven.
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| CN110511031A (en) * | 2019-09-17 | 2019-11-29 | 南京工业大学 | Preparation method based on fiber reinforced boron carbide composite aerogel high emission coating |
| CN112299862A (en) * | 2019-07-26 | 2021-02-02 | 航天特种材料及工艺技术研究所 | Thermal protection coating on surface of porous thermal insulation material and preparation method thereof |
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| CN107142715A (en) * | 2017-04-11 | 2017-09-08 | 南京工业大学 | A kind of reusable anti-heat-insulation integrative material of light flexible and preparation method thereof |
| CN108276015A (en) * | 2018-02-28 | 2018-07-13 | 南京工业大学 | A kind of fiber reinforced high-temperature-resistant high emissivity integrated material and preparation method thereof |
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| CN102731060A (en) * | 2012-06-18 | 2012-10-17 | 南京工业大学 | Preparation method for carbon fiber felt reinforced C-Al2O3 composite aerogel |
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| CN112299862A (en) * | 2019-07-26 | 2021-02-02 | 航天特种材料及工艺技术研究所 | Thermal protection coating on surface of porous thermal insulation material and preparation method thereof |
| CN110511031A (en) * | 2019-09-17 | 2019-11-29 | 南京工业大学 | Preparation method based on fiber reinforced boron carbide composite aerogel high emission coating |
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