CN115521647A - Infrared sintered coating and preparation method thereof - Google Patents
Infrared sintered coating and preparation method thereof Download PDFInfo
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- CN115521647A CN115521647A CN202211313776.XA CN202211313776A CN115521647A CN 115521647 A CN115521647 A CN 115521647A CN 202211313776 A CN202211313776 A CN 202211313776A CN 115521647 A CN115521647 A CN 115521647A
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- 238000000576 coating method Methods 0.000 title claims abstract description 86
- 239000011248 coating agent Substances 0.000 title claims abstract description 84
- 238000002360 preparation method Methods 0.000 title abstract description 12
- 238000005245 sintering Methods 0.000 claims abstract description 99
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 claims abstract description 28
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 claims abstract description 28
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 claims abstract description 27
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims abstract description 27
- 239000007822 coupling agent Substances 0.000 claims abstract description 26
- 239000007864 aqueous solution Substances 0.000 claims abstract description 22
- 239000007788 liquid Substances 0.000 claims abstract description 21
- 239000002270 dispersing agent Substances 0.000 claims abstract description 20
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 16
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims abstract description 15
- 239000010936 titanium Substances 0.000 claims abstract description 15
- 229910052719 titanium Inorganic materials 0.000 claims abstract description 15
- 239000000243 solution Substances 0.000 claims abstract description 14
- 239000004408 titanium dioxide Substances 0.000 claims abstract description 13
- 239000004115 Sodium Silicate Substances 0.000 claims abstract description 11
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims abstract description 11
- 229910052911 sodium silicate Inorganic materials 0.000 claims abstract description 11
- 239000000945 filler Substances 0.000 claims abstract description 10
- 239000008367 deionised water Substances 0.000 claims abstract description 9
- 229910021641 deionized water Inorganic materials 0.000 claims abstract description 9
- 239000012752 auxiliary agent Substances 0.000 claims abstract description 4
- 238000003756 stirring Methods 0.000 claims description 46
- 238000000227 grinding Methods 0.000 claims description 23
- 239000000203 mixture Substances 0.000 claims description 13
- 238000000034 method Methods 0.000 claims description 12
- 238000001035 drying Methods 0.000 claims description 9
- 239000007787 solid Substances 0.000 claims description 7
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 238000003801 milling Methods 0.000 claims 3
- 238000010438 heat treatment Methods 0.000 abstract description 14
- 239000000463 material Substances 0.000 abstract description 7
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 10
- 239000004810 polytetrafluoroethylene Substances 0.000 description 10
- -1 Polytetrafluoroethylene Polymers 0.000 description 7
- 230000008569 process Effects 0.000 description 6
- 239000002994 raw material Substances 0.000 description 5
- 239000004642 Polyimide Substances 0.000 description 4
- 229920001721 polyimide Polymers 0.000 description 4
- 238000004321 preservation Methods 0.000 description 4
- 239000002131 composite material Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000005507 spraying Methods 0.000 description 3
- 239000000919 ceramic Substances 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- 238000005485 electric heating Methods 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 229920000742 Cotton Polymers 0.000 description 1
- 206010053615 Thermal burn Diseases 0.000 description 1
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- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
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- 229910001220 stainless steel Inorganic materials 0.000 description 1
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Classifications
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D1/00—Coating compositions, e.g. paints, varnishes or lacquers, based on inorganic substances
- C09D1/02—Coating compositions, e.g. paints, varnishes or lacquers, based on inorganic substances alkali metal silicates
- C09D1/04—Coating compositions, e.g. paints, varnishes or lacquers, based on inorganic substances alkali metal silicates with organic additives
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
Abstract
The invention relates to an infrared sintered coating and a preparation method thereof, wherein the infrared sintered coating comprises the following components in parts by weight: 65-85 parts of silicate aqueous solution, 1.5-8 parts of assistant and 1.7-11 parts of filler; the silicate water solution comprises the following components in parts by mass: 20-30 parts of sodium silicate, 25-45 parts of deionized water and 2-6 parts of acetic acid; the auxiliary agent comprises a dispersing agent and a coupling agent, and the filler comprises titanium dioxide, iron oxide red and high-temperature-resistant titanium red. The preparation method of the infrared sintering coating comprises the steps of preparing a silicate aqueous solution, preparing a coating liquid and coating the coating liquid on the inner wall of a sintering furnace pipeline. The infrared sintering coating can be heated in a sintering furnace, and heat can excite the filler in the infrared sintering coating, so that infrared light with a specific wavelength range is emitted, the heating speed is increased, the sintering efficiency is effectively improved, and the damage to materials in a cable is avoided.
Description
Technical Field
The invention belongs to the technical field of infrared sintering, and particularly relates to an infrared sintering coating and a preparation method thereof.
Background
The domestic equipment for sintering the Polytetrafluoroethylene (PTFE) mounting wire is mostly a common electric heating furnace, the air is heated to high temperature by only depending on a resistance wire in a heating mode, and the wire is heated to be fused with the polytetrafluoroethylene by means of heat conduction of the air. However, this device is not suitable for sintering FF47 series composite insulated lapped wire, which has an inner layer of polyimide composite film and an outer layer of PTFE raw material tape. Because the main component of the polyimide composite film is a Polyimide (PI) film which can crack at high temperature, the FF47 series cable is not suitable for being sintered in a common electric heating mode.
After investigation and summary of production experience, the infrared sintered form can significantly improve the above problems. The infrared sintering principle is that infrared light is generated by heating an infrared emitter, particularly far infrared light with the wavelength of about 10um, the local permeability is strong, the infrared light is easily absorbed by an object and converted into internal energy, and the infrared sintering temperature control effect is remarkable. The polytetrafluoroethylene materials are sintered by a sintering mode, so that the polytetrafluoroethylene materials are heated to be molten and bonded with each other. However, the existing infrared sintering furnace mostly adopts metal wires to directly heat to more than 500 ℃ to emit infrared rays, the sintering furnace is mostly used for heating temperature-resistant products such as ceramics, and the like, and when a common sintering furnace sinters polytetrafluoroethylene materials, the temperature rise speed is slow, so that the sintering linear speed, namely the moving speed of a cable, needs to be limited, the heating time of the cable is directly increased, the sintering efficiency is influenced, and the higher temperature in the furnace can also damage the materials of the inner layer of the cable.
Disclosure of Invention
The invention aims to provide an infrared sintering coating and a preparation method thereof, and aims to solve the problem of low sintering efficiency of a sintering furnace.
An infrared sintered coating of the invention is realized by:
an infrared sintering coating comprises the following components in parts by mass:
65-85 parts of silicate aqueous solution, 1.5-8 parts of assistant and 1.7-11 parts of filler;
the silicate water solution comprises the following components in parts by mass:
20-30 parts of sodium silicate, 25-45 parts of deionized water and 2-6 parts of acetic acid;
the auxiliary agent comprises a dispersing agent and a coupling agent, and the filler comprises titanium dioxide, iron oxide red and high-temperature-resistant titanium red.
Further, the mass portion of the dispersing agent is 0.5-2 parts, and the mass portion of the coupling agent is 1-6 parts.
Furthermore, the titanium dioxide is 0.5-4 parts by weight, the iron oxide red is 1-5 parts by weight, and the high-temperature resistant titanium red is 0.2-2 parts by weight.
Secondly, the invention also provides a preparation method of the infrared sintering coating, which comprises the following steps:
s1: preparing a silicate aqueous solution;
s2: adding a dispersing agent into the silicate aqueous solution under the stirring state, gradually adding titanium dioxide, iron oxide red and high-temperature resistant titanium red, and continuously stirring;
s3: putting the mixture obtained in the step S2 into a grinder for fineness grinding;
s4: adding a coupling agent into the mixture obtained in the step S3, and uniformly stirring to form a coating solution;
s5: and (3) uniformly coating the coating liquid on the inner wall of the sintering furnace pipeline, and drying to form the infrared sintering coating.
Further, in step S1, the silicate aqueous solution is prepared by:
adding the sodium silicate solid into deionized water, stirring at normal temperature with the stirring speed of 50-100rpm for 0.5h, and adding acetic acid while stirring to obtain a silicate aqueous solution.
Further, in step S2, the stirring speed is 200-500rpm, and the stirring time is 0.5h.
Further, in step S3, the rotation speed of the grinding machine is 1500-2000rpm, the grinding time is 1h, and the temperature in the grinding cylinder during the grinding process is not more than 60 ℃.
Further, in step S3, the fineness of the product obtained by grinding is less than 80um.
Further, in the step S4, the stirring speed is 200-500rpm, and the stirring time is 0.5h;
the viscosity of the coating liquid obtained is 0.5 to 0.8 pas.
Further, in step S5, the coating liquid needs to be coated for 4-9 times, the drying time is not less than 48h, and the thickness of the obtained infrared sintering coating is 80-300um.
After the technical scheme is adopted, the invention has the beneficial effects that:
(1) After the infrared sintering coating is coated on the sintering furnace, when the sintering furnace is heated, heat can be used for exciting the filler in the infrared sintering coating, so that infrared light with a specific wavelength range is emitted, the heating speed is increased, the sintering efficiency is effectively improved, the sintering temperature in the furnace is reduced, and the damage to materials in the cable is avoided;
(2) The preparation method of the infrared sintering coating adopts the high-temperature-resistant slurry formula design, and adopts the coating process to directly coat the coating on the inner wall of the sintering furnace pipeline, so that the preparation process and the construction process are very simple.
Drawings
The invention is further illustrated by the following examples in conjunction with the drawings.
FIG. 1 is a cross-sectional view of a sintering furnace duct of a preferred embodiment of the present invention;
FIG. 2 is a block diagram of a multi-section sintering furnace tube pre-assembly in accordance with a preferred embodiment of the present invention;
in the figure: the device comprises an infrared sintering layer 1, a heating layer 2, a heat preservation layer 3, a shell 4, a sintering furnace pipeline 5, a sliding cable 6 and a rail 7.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments.
Thus, the following detailed description of embodiments of the invention is not intended to limit the scope of the invention as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
An infrared sintering coating comprises the following components in parts by weight: 65-85 parts of silicate aqueous solution, 1.5-8 parts of assistant and 1.7-11 parts of filler; the silicate water solution comprises the following components in parts by mass: 20-30 parts of sodium silicate, 25-45 parts of deionized water and 2-6 parts of acetic acid; the auxiliary agent comprises a dispersing agent and a coupling agent, and the filler comprises titanium dioxide, iron oxide red and high-temperature-resistant titanium red.
The mass portion of the dispersant is 0.5-2, and the mass portion of the coupling agent is 1-6.
The dispersing agent can effectively improve the dispersion uniformity of the titanium dioxide, the iron oxide red and the high-temperature resistant titanium red in the silicate water solution; the coupling agent is used to adjust the viscosity of the coating liquid.
Wherein the dispersant can be one or more of HT A30, HT A20, and HT-5082 selected from Korean Thai chemical industry of Nantong city.
The coupling agent is one or more of KH-551, KH-550, JTW-18 and JTW-181 in Nanjing warp-weft chemical industry.
The titanium dioxide is 0.5-4 parts by weight, the iron oxide red is 1-5 parts by weight, and the high temperature resistant titanium red is 0.2-2 parts by weight.
Wherein, the heating efficiency of infrared ray can be effectively improved by mixing the iron oxide red and the high-temperature resistant titanium red.
The high temperature resistant titanium red may be selected from, but is not limited to, rutile titanium dioxide, such as DuPont R706 and Kemu R-103.
The invention further provides a preparation method of the infrared sintering coating, which comprises the following steps:
s1: preparing a silicate aqueous solution;
specifically, the compounding method of the silicate aqueous solution comprises the following steps:
adding the sodium silicate solid into deionized water, stirring at normal temperature with the stirring speed of 50-100rpm for 0.5h, and adding acetic acid while stirring to obtain a silicate aqueous solution.
S2: adding a dispersing agent into the silicate aqueous solution under the stirring state, gradually adding titanium dioxide, iron oxide red and high-temperature resistant titanium red, and continuously stirring;
wherein the stirring speed is 200-500rpm, and the stirring time is 0.5h.
S3: putting the mixture obtained in the step S2 into a grinder for fineness grinding;
wherein the rotation speed of the grinding machine is 1500-2000rpm, the grinding time is 1h, and the temperature in the grinding cylinder does not exceed 60 ℃ in the grinding process.
The temperature is controlled to be not higher than 60 ℃, and the influence of particle agglomeration on the dispersion effect can be effectively avoided.
In order to realize the control of the temperature in the grinding cylinder, the grinding cylinder can be cooled by circulating water.
During the grinding process, the mixture in the grinding mill is sampled and subjected to a fineness test, and when the fineness is less than 80um, the grinding is completed.
S4: adding a coupling agent into the mixture obtained in the step S3, and uniformly stirring to form a coating solution;
and (3) after grinding is finished, cooling the mixture obtained in the step (S2) to normal temperature, adding the coupling agent, and uniformly stirring at the stirring speed of 200-500rpm for 0.5h.
Before the coupling agent is added, the mixture obtained in the step S2 needs to be cooled to avoid the failure of the coupling agent caused by overhigh temperature and prevent the sagging phenomenon in the later coating process.
The amount of the coupling agent added is adjusted according to the viscosity of the coating liquid, and the addition of the coupling agent is stopped when the viscosity of the coating liquid is in the range of 0.5 to 0.8 pas.
S5: and (3) uniformly coating the coating liquid on the inner wall of the sintering furnace pipeline 5, and drying to form the infrared sintering coating 2.
The coating liquid can be applied by spraying or brushing and the like, the coating liquid is coated on the inner wall of the sintering furnace pipeline 5 for 4-9 times, and then the infrared sintering coating 2 with red color can be formed after the coating liquid is dried for not less than 48 hours.
Preferably, in order to improve the adhesion of the coating liquid, the coating area in the sintering furnace may be ground before coating.
Preferably, the infrared sintered coating 2 is dried at normal temperature, so that cracks of the dried infrared sintered coating 2 can be effectively avoided, and the quality of the infrared sintered coating is ensured.
As shown in fig. 1, a sintering furnace tube 5 coated with an infrared sinter coating 2 comprises a heating layer 1, and an infrared sinter coating 2 attached to the inside of the heating layer 1.
When the heating area is electrified to work, heat is transferred to the infrared sintering coating 2, the infrared sintering coating 2 is heated to excite radiation under the high-temperature condition, infrared rays are emitted, the permeability is strong, the infrared rays are easily absorbed and converted into internal energy by an outer insulating material of a cable, namely a polytetrafluoroethylene raw material belt, the temperature is quickly raised to be molten and bonded with each other, the sintering of inner materials of the polytetrafluoroethylene raw material belt is reduced, and the pertinence of a sintering process is improved.
Secondly, the outside parcel of zone of heating 1 has heat preservation 3, and the outer parcel of heat preservation 3 has shell 4.
Wherein, heat preservation 3 can select for use but not limited to the glass fiber cotton, and it sticiss to fill in inside shell 4, can keep warm to the fritting furnace effectively, reduces thermal loss, further improves sintering efficiency.
The shell 4 may be made of, but not limited to, stainless steel, which can improve the strength of the whole sintering furnace.
The lengths of the multiple sections of sintering furnace pipelines 5 can be flexibly controlled as required, and two adjacent sections of sintering furnaces can be mutually combined and connected through sliding rails to form a tight matching mode, so that the loss of heat is avoided.
Specifically, as shown in fig. 2, a rail 7 is arranged below the multiple sintering furnace pipes 5, a sliding rope 6 which is matched with the rail 7 is arranged at the bottom of the sintering furnace pipes 5, and the sintering furnace pipes 5 are driven to move on the rail 7 through the sliding rope 6, so that the matching of the multiple sintering furnace pipes 5 is realized.
Be provided with ceramic gyro wheel in the fritting furnace and be used for walking the cable, avoid cable contact furnace body to scald.
In addition, the infrared sintering coating 2 also has a remarkable temperature control effect, and can effectively improve the uniformity of temperature distribution in the sintering furnace.
Specifically, a thermistor probe is embedded below each section of sintering furnace, and a temperature controller in a connection control box is used for controlling the power of a heating area, so that accurate temperature control is realized, and the temperature fluctuation of the temperature control mode is not more than 2 ℃.
The temperature controller can be selected from but not limited to the temperature controller of the Japanese off-the-shelf RKC, and the temperature control range can reach 600 ℃ at most.
Example 1
A preparation method of an infrared sintering coating comprises the following steps:
s1: preparing a silicate aqueous solution: taking 30 parts of sodium silicate solid, adding the sodium silicate solid into 45 parts of deionized water, stirring at the stirring speed of 65rpm for 0.5, and adding 3 parts of acetic acid during stirring to obtain a silicate aqueous solution;
s2: adding 1.5 parts of dispersing agent into the silicate aqueous solution under the stirring state, then gradually adding 3 parts of titanium dioxide, 3 parts of iron oxide red and 1 part of high-temperature resistant titanium red, and continuing stirring at the stirring speed of 350rpm for 0.5h;
wherein the dispersant comprises 1 part of dispersant HT A30 and 0.5 part of dispersant HT A20.
S3: and (3) putting the mixture obtained in the step (S2) into a grinder for fineness grinding, wherein the rotation speed of the grinder is 1800rpm, and the grinding time is 1h.
S4: adding 4.5 parts of coupling agent into the mixture obtained in the step S3, and uniformly stirring at the stirring speed of 350rpm for 0.5h to form a coating solution;
wherein the coupling agent comprises 1.5 parts of coupling agent KH-551 and 3 parts of coupling agent KH-550.
S5: and (3) uniformly coating the coating liquid on the inner wall of the sintering furnace pipeline 5, and drying to form the infrared sintering coating 2.
The coating liquid can be coated on the inner wall of the sintering furnace pipeline 5 for 6 times by adopting a spraying mode, then the coating liquid is dried at normal temperature, the drying time is 55h, and the infrared sintering coating 2 with red color and 200um thickness can be formed.
Example 2
A preparation method of an infrared sintering coating comprises the following steps:
s1: preparing a silicate aqueous solution: taking 25 parts of sodium silicate solid, adding the sodium silicate solid into 45 parts of deionized water, stirring at the stirring speed of 80rpm for 0.5, and adding 2 parts of acetic acid in the stirring process to obtain a silicate water solution;
s2: adding 1.5 parts of dispersing agent into the silicate aqueous solution under the stirring state, then gradually adding 3 parts of titanium dioxide, 5 parts of iron oxide red and 1 part of high-temperature resistant titanium red, and continuing stirring at the stirring speed of 370rpm for 0.5h;
wherein the dispersant comprises 1 part of dispersant HT A30 and 0.5 part of dispersant HT-5082.
S3: and (3) putting the mixture obtained in the step (S2) into a grinder for fine grinding, wherein the rotation speed of the grinder is 1850rpm, and the grinding time is 1h.
S4: adding 5.5 parts of coupling agent into the mixture obtained in the step S3, and uniformly stirring at the stirring speed of 380rpm for 0.5h to form a coating solution;
wherein the coupling agent comprises 1.5 parts of coupling agent KH-551, 3 parts of coupling agent KH-550 and 1 part of coupling agent JTW-18.
S5: and (3) uniformly coating the coating liquid on the inner wall of the sintering furnace pipeline 5, and drying to form the infrared sintering coating 2.
The coating liquid can be coated on the inner wall of the sintering furnace pipeline 5 for 6 times in a spraying mode, then the coating liquid is dried at normal temperature, the drying time is 53 hours, and the infrared sintering coating 2 which is red in color and 200um thick can be formed.
The same batch of cables, which were externally tape-insulated, were sintered using the sintering furnace of example 1, the sintering furnace of example 2 and the sintering furnace without the infrared sintering layer applied. Moreover, the sintering temperatures in the three sintering furnaces are all 450 ℃ under the condition that the DSC enthalpy difference after sintering the raw material tape is in the range of 0-3J/g.
Wherein, the sintering linear speed in the sintering furnace in the embodiment 1 is 8.5m/min, the sintering linear speed in the sintering furnace in the embodiment 2 is 7.2m/min, and the sintering linear speed in the sintering furnace without coating the infrared sintering layer is 4.5m/min.
Therefore, compared with a sintering furnace which is not coated with the infrared sintering layer, the sintering furnace coated with the infrared sintering layer can effectively improve the sintering speed and the sintering efficiency of the sintering furnace under the condition of achieving the same insulation sintering state of the raw material tape.
The infrared sintering layer prepared by the invention can emit infrared rays with wavelengths in a specific range (1000-2000 nm), can effectively improve the heating efficiency of the PTFE film insulating layer, reduces the sintering temperature, and avoids the condition that the cable is internally damaged under the high-temperature condition.
In light of the foregoing description of the preferred embodiment of the present invention, many modifications and variations will be apparent to those skilled in the art without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.
Claims (10)
1. The infrared sintered coating is characterized by comprising the following components in parts by mass:
65-85 parts of silicate aqueous solution, 1.5-8 parts of assistant and 1.7-11 parts of filler;
the silicate water solution comprises the following components in parts by weight:
20-30 parts of sodium silicate, 25-45 parts of deionized water and 2-6 parts of acetic acid;
the auxiliary agent comprises a dispersing agent and a coupling agent, and the filler comprises titanium dioxide, iron oxide red and high-temperature-resistant titanium red.
2. The infrared sintered coating of claim 1, wherein the dispersant is present in an amount of 0.5 to 2 parts by weight, and the coupling agent is present in an amount of 1 to 6 parts by weight.
3. The infrared sintered coating of claim 1, wherein the titanium dioxide is 0.5-4 parts by weight, the iron oxide red is 1-5 parts by weight, and the high temperature resistant titanium red is 0.2-2 parts by weight.
4. A method for producing an infrared sintered coating according to any of claims 1 to 3, characterized in that it comprises the following steps:
s1: preparing a silicate aqueous solution;
s2: adding a dispersing agent into the silicate aqueous solution under the stirring state, gradually adding titanium dioxide, iron oxide red and high-temperature resistant titanium red, and continuously stirring;
s3: putting the mixture obtained in the step S2 into a grinder for fineness grinding;
s4: adding a coupling agent into the mixture obtained in the step S3, and uniformly stirring to form a coating solution;
s5: and (3) uniformly coating the coating liquid on the inner wall of the sintering furnace pipeline (5), and drying to form the infrared sintering coating (2).
5. The method for preparing an infrared sintered coating according to claim 4, wherein in step S1, the silicate aqueous solution is mixed by:
adding the sodium silicate solid into deionized water, stirring at normal temperature with the stirring speed of 50-100rpm for 0.5h, and adding acetic acid while stirring to obtain a silicate aqueous solution.
6. The method for preparing infrared sintered coating according to claim 4, wherein in step S2, the stirring speed is 200-500rpm and the stirring time is 0.5h.
7. The method for producing an infrared sintered coating according to claim 4, wherein in step S3, the rotation speed of the mill is 1500-2000rpm, the milling time is 1 hour, and the temperature in the milling cylinder during milling does not exceed 60 ℃.
8. The method for preparing infrared sintered coating as claimed in claim 4, wherein in step S3, fineness of the product obtained by grinding is less than 80um.
9. The method for preparing an infrared sintered coating according to claim 4, wherein in step S4, the stirring speed is 200-500rpm, and the stirring time is 0.5h;
the viscosity of the coating liquid obtained is 0.5 to 0.8 pas.
10. The method for preparing the infrared sintering coating as claimed in claim 4, wherein in the step S5, the coating solution is coated for 4-9 times, the drying time is not less than 48h, and the thickness of the obtained infrared sintering coating (2) is 80-300um.
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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