CN108048776A - A kind of thermal barrier coating - Google Patents
A kind of thermal barrier coating Download PDFInfo
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- CN108048776A CN108048776A CN201711215126.0A CN201711215126A CN108048776A CN 108048776 A CN108048776 A CN 108048776A CN 201711215126 A CN201711215126 A CN 201711215126A CN 108048776 A CN108048776 A CN 108048776A
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
- C23C4/04—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the coating material
- C23C4/06—Metallic material
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B33/00—Silicon; Compounds thereof
- C01B33/113—Silicon oxides; Hydrates thereof
- C01B33/12—Silica; Hydrates thereof, e.g. lepidoic silicic acid
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
- C23C4/12—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the method of spraying
- C23C4/126—Detonation spraying
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
- C23C4/12—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the method of spraying
- C23C4/134—Plasma spraying
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Abstract
The invention discloses a kind of thermal barrier coatings, are made of following substance：Cerium oxide, zirconium dioxide, yttrium oxide, aluminic acid ester fiber, aluminium powder, palladium bichloride, improved silica, titanium nitride, nickel powder, cobalt powder, dimethyl oxalate.The reasonably combined various ingredients of the present invention, co-formulation have the characteristics that hardness is high, intensity is big, heat-resistant antifriction is good, sound-absorption and heat-insulation ability is strong, effectively improve the protection effect to workpiece, great application value into thermal barrier coating.
Description
Technical field
The invention belongs to coating technology fields, and in particular to a kind of thermal barrier coating.
Background technology
It is a kind of material relatively low using thermal conductivity factor that thermal barrier coating, which leads to, and high-temperature alloy base is coated on suitable technology
Body surface face is so as to playing the functional coating of heat-blocking action.Typical thermal barrier coating is by high temperature alloy matrix, metal bonding coating and top
Portion's heat insulating ceramic coat composition.Wherein, high temperature alloy matrix is primarily subjected to mechanical load；Adhesive layer, which mainly rises, improves matrix and pottery
The effect of porcelain coating physical compatibility and antioxidant anticorrosive；Top ceramic layer main function is isolation heat and generates temperature ladder
Degree, heterogeneous microstructure play a crucial role to the heat-proof quality and service life of thermal barrier coating.But when thermal barrier coating is applied to
During the operating temperature increasingly increased, harsher working environment will be faced, thermal barrier coating made from the prior art, which exists, easily to be occurred
Phase transformation, inoxidizability is low, intensity is small, poor high temperature stability, is also easy to produce the defects of high temperature corrosion, it is difficult to meet turbine inlet temperature (TIT)
The needs further improved.Therefore, better heat-proof quality and under the high temperature conditions good stability, elevated temperature corrosion resistant are found
New heat barrier coat material excellent, vdiverse in function becomes the hot spot of thermal barrier coating area research in recent years.
The content of the invention
The purpose of the present invention is being directed to the problem of existing, a kind of thermal barrier coating is provided.
The present invention is achieved by the following technical solutions：
A kind of thermal barrier coating is made of the substance of following parts by weight：
33 ~ 36 parts of cerium oxide, 40 ~ 45 parts of zirconium dioxides, 28 ~ 32 parts of yttrium oxides, 4 ~ 7 parts of aluminic acid ester fibers, 12 ~ 15 parts of aluminium powders, 1
~ 3 parts of palladium bichlorides, 5 ~ 8 parts of improved silicas, 2 ~ 5 parts of titanium nitrides, 4 ~ 8 parts of nickel powders, 3 ~ 6 parts of cobalt powders, 5 ~ 10 parts of oxalic acid diformazans
Ester.
Preferably, it is made of the substance of following parts by weight：
35 ~ 36 parts of cerium oxide, 43 ~ 45 parts of zirconium dioxides, 30 ~ 32 parts of yttrium oxides, 6 ~ 7 parts of aluminic acid ester fibers, 14 ~ 15 parts of aluminium powders, 2
~ 3 parts of palladium bichlorides, 7 ~ 8 parts of improved silicas, 4 ~ 5 parts of titanium nitrides, 6 ~ 8 parts of nickel powders, 5 ~ 6 parts of cobalt powders, 8 ~ 10 parts of oxalic acid diformazans
Ester.
Preferably, it is made of the substance of following parts by weight：
35 parts of cerium oxide, 43 parts of zirconium dioxides, 30 parts of yttrium oxides, 6 parts of aluminic acid ester fibers, 14 parts of aluminium powders, 2 parts of palladium bichlorides, 7 parts change
Property silica, 4 parts of titanium nitrides, 6 parts of nickel powders, 5 parts of cobalt powders, 8 parts of dimethyl oxalates.
Further, the preparation method of the improved silica includes the following steps：
A. by cocamidopropyl propyl amide amine oxide and ethanol solution according to mass ratio 1:12 ~ 15 common mixing are put into reaction kettle,
It is spare after 15 ~ 20min of supersound process；
B. ammonium hydroxide is added dropwise into step a treated reaction kettles, the additive amount of ammonium hydroxide is the 1 of cocamidopropyl propyl amide amine oxide total amount
It ~ 3 times, stirs evenly rear spare；
C. add in ethyl orthosilicate into step b treated reaction kettles, after 20 ~ 25min of stir process again into reaction kettle plus
Enter modified solution, it is spare to obtain mixed reactant after constantly 1 ~ 1.5h of supersound process；The modified solution by following parts by weight object
Matter forms：18 ~ 22 parts of absolute ethyl alcohols, 6 ~ 9 parts of ammonium hydroxide, 5 ~ 8 parts of titanate coupling agents, 2 ~ 4 parts of acrylic acid, 1 ~ 3 part of sodium pyrophosphate,
4 ~ 7 parts of carbon nanotubes, 90 ~ 100 parts of water；
D. the mixed reactant obtained by step c is aged, after centrifugal filtration, then is cleaned filter residue to neutrality with distilled water,
Finally by treated, filter residue is put into 1 ~ 2h of calcination processing in Muffle furnace, is taken out after finishing up to improved silica.
Further, the volume fraction of ethyl alcohol is 50 ~ 60% in the ethanol solution described in step a.
Further, the additive amount of the ethyl orthosilicate described in step c is 8 ~ 10 times of ethanol solution gross mass.
Further, the additive amount of the modified solution described in step c is 1 ~ 1.2 times of ethanol solution gross mass.
Further, it is 520 ~ 550 DEG C that the temperature in Muffle furnace is controlled during calcination processing described in step d.
The present invention has carried out the component of thermal barrier coating rational collocation processing, wherein with palladium bichloride, titanium nitride, nickel powder and
Metal bonding coating has been made in cooperation to cobalt powder jointly, and whole compactness and caking property are good, play good intermediate layer
Effect, with cerium oxide, zirconium dioxide, yttrium oxide, aluminic acid ester fiber, aluminium powder, improved silica, ceramics have been made in cooperation jointly
Layer has the characteristics such as good heat-insulated, heatproof, intensity, wherein improved silica obtained is using ethyl orthosilicate as silicon
Source, ethanol solution are solvent, and ammonium hydroxide is catalyst, and titanate coupling agent is modifying agent, and acrylic acid, sodium pyrophosphate are coating agent,
Cocamidopropyl propyl amide amine oxide is activating agent and template, and carbon nanotubes is nucleating additive, common manufactured with porous structure
Earth silicon material, aperture is Nano grade, and empty more, large specific surface area, noise reduction, adsorption capacity are strong, and the work of its surface
Property it is high, the hollow carbon nanotubes and the silica dioxide granule of porous structure inside contained forms complicated return flow line, is promoted
To the dissipation of sound and the isolation of heat, the integrated quality of ceramic layer is improved.
The present invention has the following advantages compared with prior art：
The reasonably combined various ingredients of the present invention, co-formulation is into thermal barrier coating, with hardness is high, intensity is big, heat-resisting resistance to
The features such as mill property is good, sound-absorption and heat-insulation ability is strong, effectively improves the protection effect to workpiece, great application value.
Specific embodiment
Embodiment 1
A kind of thermal barrier coating is made of the substance of following parts by weight：
33 parts of cerium oxide, 40 parts of zirconium dioxides, 28 parts of yttrium oxides, 4 parts of aluminic acid ester fibers, 12 parts of aluminium powders, 1 part of palladium bichloride, 5 parts change
Property silica, 2 parts of titanium nitrides, 4 parts of nickel powders, 3 parts of cobalt powders, 5 parts of dimethyl oxalates.
Further, the preparation method of the improved silica includes the following steps：
A. by cocamidopropyl propyl amide amine oxide and ethanol solution according to mass ratio 1:12 common mixing are put into reaction kettle, ultrasound
It is spare after processing 15min；
B. ammonium hydroxide is added dropwise into step a treated reaction kettles, the additive amount of ammonium hydroxide is the 1 of cocamidopropyl propyl amide amine oxide total amount
Times, it stirs evenly rear spare；
C. ethyl orthosilicate is added in into step b treated reaction kettles, adds in and change into reaction kettle again after stir process 20min
Property solution, constantly be ultrasonically treated 1h after mixed reactant it is spare；The modified solution by following parts by weight material composition：18
Part absolute ethyl alcohol, 6 parts of ammonium hydroxide, 5 parts of titanate coupling agents, 2 parts of acrylic acid, 1 part of sodium pyrophosphate, 4 parts of carbon nanotubes, 90 parts of water；
D. the mixed reactant obtained by step c is aged, after centrifugal filtration, then is cleaned filter residue to neutrality with distilled water,
Finally by treated, filter residue is put into calcination processing 1h in Muffle furnace, is taken out after finishing up to improved silica.
Further, the volume fraction of ethyl alcohol is 50% in the ethanol solution described in step a.
Further, the additive amount of the ethyl orthosilicate described in step c is 8 times of ethanol solution gross mass.
Further, the additive amount of the modified solution described in step c is 1 times of ethanol solution gross mass.
Further, it is 520 DEG C that the temperature in Muffle furnace is controlled during calcination processing described in step d.
Embodiment 2
A kind of thermal barrier coating is made of the substance of following parts by weight：
35 parts of cerium oxide, 43 parts of zirconium dioxides, 30 parts of yttrium oxides, 6 parts of aluminic acid ester fibers, 14 parts of aluminium powders, 2 parts of palladium bichlorides, 7 parts change
Property silica, 4 parts of titanium nitrides, 6 parts of nickel powders, 5 parts of cobalt powders, 8 parts of dimethyl oxalates.
Further, the preparation method of the improved silica includes the following steps：
A. by cocamidopropyl propyl amide amine oxide and ethanol solution according to mass ratio 1:14 common mixing are put into reaction kettle, ultrasound
It is spare after processing 18min；
B. ammonium hydroxide is added dropwise into step a treated reaction kettles, the additive amount of ammonium hydroxide is the 2 of cocamidopropyl propyl amide amine oxide total amount
Times, it stirs evenly rear spare；
C. ethyl orthosilicate is added in into step b treated reaction kettles, adds in and change into reaction kettle again after stir process 23min
Property solution, constantly be ultrasonically treated 1.2h after mixed reactant it is spare；The modified solution by following parts by weight material composition：
20 parts of absolute ethyl alcohols, 8 parts of ammonium hydroxide, 7 parts of titanate coupling agents, 3 parts of acrylic acid, 2 parts of sodium pyrophosphates, 5 parts of carbon nanotubes, 95 parts
Water；
D. the mixed reactant obtained by step c is aged, after centrifugal filtration, then is cleaned filter residue to neutrality with distilled water,
Finally by treated, filter residue is put into calcination processing 1.5h in Muffle furnace, is taken out after finishing up to improved silica.
Further, the volume fraction of ethyl alcohol is 55% in the ethanol solution described in step a.
Further, the additive amount of the ethyl orthosilicate described in step c is 9 times of ethanol solution gross mass.
Further, the additive amount of the modified solution described in step c is 1.1 times of ethanol solution gross mass.
Further, it is 540 DEG C that the temperature in Muffle furnace is controlled during calcination processing described in step d.
Embodiment 3
A kind of thermal barrier coating is made of the substance of following parts by weight：
36 parts of cerium oxide, 45 parts of zirconium dioxides, 32 parts of yttrium oxides, 7 parts of aluminic acid ester fibers, 15 parts of aluminium powders, 3 parts of palladium bichlorides, 8 parts change
Property silica, 5 parts of titanium nitrides, 8 parts of nickel powders, 6 parts of cobalt powders, 10 parts of dimethyl oxalates.
Further, the preparation method of the improved silica includes the following steps：
A. by cocamidopropyl propyl amide amine oxide and ethanol solution according to mass ratio 1:15 common mixing are put into reaction kettle, ultrasound
It is spare after processing 20min；
B. ammonium hydroxide is added dropwise into step a treated reaction kettles, the additive amount of ammonium hydroxide is the 3 of cocamidopropyl propyl amide amine oxide total amount
Times, it stirs evenly rear spare；
C. ethyl orthosilicate is added in into step b treated reaction kettles, adds in and change into reaction kettle again after stir process 25min
Property solution, constantly be ultrasonically treated 1.5h after mixed reactant it is spare；The modified solution by following parts by weight material composition：
22 parts of absolute ethyl alcohols, 9 parts of ammonium hydroxide, 8 parts of titanate coupling agents, 4 parts of acrylic acid, 3 parts of sodium pyrophosphates, 7 parts of carbon nanotubes, 100 parts
Water；
D. the mixed reactant obtained by step c is aged, after centrifugal filtration, then is cleaned filter residue to neutrality with distilled water,
Finally by treated, filter residue is put into calcination processing 2h in Muffle furnace, is taken out after finishing up to improved silica.
Further, the volume fraction of ethyl alcohol is 60% in the ethanol solution described in step a.
Further, the additive amount of the ethyl orthosilicate described in step c is 10 times of ethanol solution gross mass.
Further, the additive amount of the modified solution described in step c is 1.2 times of ethanol solution gross mass.
Further, it is 550 DEG C that the temperature in Muffle furnace is controlled during calcination processing described in step d.
The preparation application method of above-mentioned thermal barrier coating specifically comprises the following steps：
（1）First by palladium bichloride, titanium nitride, nickel powder and cobalt powder, mixing is put into heating furnace jointly, and the temperature with 800 ~ 850 DEG C adds
It after being heat-treated 20 ~ 25min, then heats up and is heated to melting, take out after being stirred continuously 2 ~ 3h of processing, most condensed after under vacuum atmosphere
Be molded, pulverize after metal bonding coating powder it is spare；
（2）It is put into mixer after residual components are mixed jointly, is put it into after high-speed stirred is uniform in calcining furnace, controlled
The temperature of system calcining takes out cooling for 1550 ~ 1600 DEG C, after 1 ~ 3h, pulverize after ceramic powders are spare；
（3）By step（1）Metal bonding coating powder obtained is sprayed at by electron thermal explosion method on metal base surface, then
By step（2）Ceramic powders obtained are sprayed at by air plasma spraying method on the metal bonding coating to be formed.
Comparative example 1
This comparative example 1 compared with Example 2, with etc. mass parts commercially available silica substituting modification silica composition,
Method and step all same in addition.
Comparative example 2
This comparative example 2 compared with Example 2, eliminates improved silica ingredient, method and step all same in addition.
In order to compare effect of the present invention, to the thermal boundary obtained by above-described embodiment 2, comparative example 1, comparative example 2
Coating is tested for the property, and specific correction data is as shown in table 1 below：
Table 1
| Coating porosity（%） | Acoustic absorptivity | Heat-insulated difference（%） | |
| Embodiment 2 | 12~15 | 0.74~0.76 | 56~59 |
| Comparative example 1 | 17~20 | 0.56~0.60 | 45~50 |
| Comparative example 2 | 22~25 | 0.52~0.55 | 44~48 |
Note：Heat-insulated difference described in upper table 1 is the difference ratio of coating front and back temperature.
The comprehensive performance of thermal barrier coating produced by the present invention is obviously improved it can be seen from upper table 1, and using effect is good,
Great popularizing value.
Claims (8)
1. a kind of thermal barrier coating, which is characterized in that be made of the substance of following parts by weight：
33 ~ 36 parts of cerium oxide, 40 ~ 45 parts of zirconium dioxides, 28 ~ 32 parts of yttrium oxides, 4 ~ 7 parts of aluminic acid ester fibers, 12 ~ 15 parts of aluminium powders, 1
~ 3 parts of palladium bichlorides, 5 ~ 8 parts of improved silicas, 2 ~ 5 parts of titanium nitrides, 4 ~ 8 parts of nickel powders, 3 ~ 6 parts of cobalt powders, 5 ~ 10 parts of oxalic acid diformazans
Ester.
2. a kind of thermal barrier coating according to claim 1, which is characterized in that be made of the substance of following parts by weight：
35 ~ 36 parts of cerium oxide, 43 ~ 45 parts of zirconium dioxides, 30 ~ 32 parts of yttrium oxides, 6 ~ 7 parts of aluminic acid ester fibers, 14 ~ 15 parts of aluminium powders, 2
~ 3 parts of palladium bichlorides, 7 ~ 8 parts of improved silicas, 4 ~ 5 parts of titanium nitrides, 6 ~ 8 parts of nickel powders, 5 ~ 6 parts of cobalt powders, 8 ~ 10 parts of oxalic acid diformazans
Ester.
3. a kind of thermal barrier coating according to claim 1, which is characterized in that be made of the substance of following parts by weight：
35 parts of cerium oxide, 43 parts of zirconium dioxides, 30 parts of yttrium oxides, 6 parts of aluminic acid ester fibers, 14 parts of aluminium powders, 2 parts of palladium bichlorides, 7 parts change
Property silica, 4 parts of titanium nitrides, 6 parts of nickel powders, 5 parts of cobalt powders, 8 parts of dimethyl oxalates.
4. a kind of thermal barrier coating according to claim 1 ~ 3 any one, which is characterized in that the improved silica
Preparation method includes the following steps：
A. by cocamidopropyl propyl amide amine oxide and ethanol solution according to mass ratio 1:12 ~ 15 common mixing are put into reaction kettle,
It is spare after 15 ~ 20min of supersound process；
B. ammonium hydroxide is added dropwise into step a treated reaction kettles, the additive amount of ammonium hydroxide is the 1 of cocamidopropyl propyl amide amine oxide total amount
It ~ 3 times, stirs evenly rear spare；
C. add in ethyl orthosilicate into step b treated reaction kettles, after 20 ~ 25min of stir process again into reaction kettle plus
Enter modified solution, it is spare to obtain mixed reactant after constantly 1 ~ 1.5h of supersound process；The modified solution by following parts by weight object
Matter forms：18 ~ 22 parts of absolute ethyl alcohols, 6 ~ 9 parts of ammonium hydroxide, 5 ~ 8 parts of titanate coupling agents, 2 ~ 4 parts of acrylic acid, 1 ~ 3 part of sodium pyrophosphate,
4 ~ 7 parts of carbon nanotubes, 90 ~ 100 parts of water；
D. the mixed reactant obtained by step c is aged, after centrifugal filtration, then is cleaned filter residue to neutrality with distilled water,
Finally by treated, filter residue is put into 1 ~ 2h of calcination processing in Muffle furnace, is taken out after finishing up to improved silica.
A kind of 5. thermal barrier coating according to claim 4, which is characterized in that ethyl alcohol in the ethanol solution described in step a
Volume fraction be 50 ~ 60%.
6. a kind of thermal barrier coating according to claim 4, which is characterized in that ethyl orthosilicate described in step c adds
Dosage is 8 ~ 10 times of ethanol solution gross mass.
A kind of 7. thermal barrier coating according to claim 4, which is characterized in that the addition of the modified solution described in step c
Amount is 1 ~ 1.2 times of ethanol solution gross mass.
8. a kind of thermal barrier coating according to claim 4, which is characterized in that controlled during calcination processing described in step d
Temperature in Muffle furnace is 520 ~ 550 DEG C.
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| CN201711215126.0A CN108048776A (en) | 2017-11-28 | 2017-11-28 | A kind of thermal barrier coating |
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| CN201711215126.0A CN108048776A (en) | 2017-11-28 | 2017-11-28 | A kind of thermal barrier coating |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1008672A1 (en) * | 1998-12-11 | 2000-06-14 | General Electric Company | Platinum modified diffusion aluminide bond coat for a thermal barrier coating system |
| CN104445215A (en) * | 2014-11-05 | 2015-03-25 | 上海大学 | Preparation method of hollow silicon dioxide nanomaterial |
| CN105063541A (en) * | 2015-08-13 | 2015-11-18 | 马鞍山蓝科再制造技术有限公司 | Thermal barrier coating with acoustic absorption and thermal insulation functions and preparing method thereof |
-
2017
- 2017-11-28 CN CN201711215126.0A patent/CN108048776A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1008672A1 (en) * | 1998-12-11 | 2000-06-14 | General Electric Company | Platinum modified diffusion aluminide bond coat for a thermal barrier coating system |
| CN104445215A (en) * | 2014-11-05 | 2015-03-25 | 上海大学 | Preparation method of hollow silicon dioxide nanomaterial |
| CN105063541A (en) * | 2015-08-13 | 2015-11-18 | 马鞍山蓝科再制造技术有限公司 | Thermal barrier coating with acoustic absorption and thermal insulation functions and preparing method thereof |
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Application publication date: 20180518 |