CN104152890A - Method for preparing thermal-shock-resistant high-temperature-resistant insulation coating on flexible metal part - Google Patents
Method for preparing thermal-shock-resistant high-temperature-resistant insulation coating on flexible metal part Download PDFInfo
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- CN104152890A CN104152890A CN201410370394.XA CN201410370394A CN104152890A CN 104152890 A CN104152890 A CN 104152890A CN 201410370394 A CN201410370394 A CN 201410370394A CN 104152890 A CN104152890 A CN 104152890A
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Abstract
The invention provides a method for preparing a thermal-shock-resistant high-temperature-resistant insulation coating on a flexible metal part, and belongs to the field of electronic materials. The method comprises the following steps: firstly, preparing slurry from inorganic powder, aerogel, organic silicon resin and a silane coupling agent; then coating the slurry on the flexible metal part by adopting a silk-screen printing, or spraying or brushing method; finally, removing glue in a drying oven at 250 DEG C for 30 minutes, and naturally cooling to room temperature, so as to obtain the high-temperature-resistant insulation coating. The method disclosed by the invention is simple and feasible, the preparation cycle of the coating is shortened, the preparation cost is reduced, the obtained coating has good adhesion property on the flexible metal part, the insulation protection requirements of components with large deformation can be better met, and the obtained coating has the characteristics of good heat-insulating property, insulativity, high-temperature resistance and thermal shock resistance.
Description
Technical field
The invention belongs to field of electronic materials, be specifically related to a kind of method of preparing the high-temperature insulation coating of heat shock resistance on the parts of flexible metal.
Background technology
In forceful electric power Application Areas, there is a large amount of metal connection parts, these parts long term operations, under the load of high-voltage and high electric current, must keep good insulation characterisitic.Due to self-heating and special Working environment, need these parts to there is good heat shock resistance and resistance to elevated temperatures simultaneously.Therefore, the insulating property of interconnecting piece, high temperature resistant and thermal shock resistance play a part very crucial to the steady running of power equipment and system.
In order to meet the technical need to interconnecting piece, need to prepare insulating coating, the insulating property of lifting piece and resistance to elevated temperatures at parts surface conduction or that lack resistance to elevated temperatures.And along with more and more can reeling, the generation of bent novel flexible electron device, more and more urgent to prepare the demand of insulating coating at flexible metal parts surface.Therefore, be badly in need of to find a kind of simple, convenient method of high-temperature insulation coating of preparing on the parts of flexible metal.
Summary of the invention
The invention provides a kind of method of preparing the high-temperature insulation coating of heat shock resistance on the parts of flexible metal; the method is simple; shortened the preparation cycle of coating; reduced preparation cost; the coating obtaining has good adhesion property on the parts of flexible metal; can better meet the insulation protection demand of the parts that deformation is larger, the coating obtaining has the characteristic of good thermal insulation, insulation, high temperature resistant and heat shock resistance.
Technical scheme of the present invention is as follows:
A method of preparing the high-temperature insulation coating of heat shock resistance on the parts of flexible metal, comprises the following steps:
(1) clean: first flexible metal parts are carried out to grinding process, then first, rear employing ethanol and the acetone flexible metal parts after to polishing clean, clean be placed under nitrogen atmosphere dry;
(2) preparation of mineral filler: the inorganic powder that size is less than to 20 microns grinds 10-20min and mixes, and aerogel is ground to 10-20min, to reduce particle size, increases the specific surface area of aerogel; Then the ratio that is 1～10:1 with aerogel according to mass ratio by the inorganic powder after grinding mixes; Mixed inorganic powder and aerogel are added in dehydrated alcohol, ultrasonic being dispersed to after the suspension liquid that forms stable homogeneous, vacuum filtration is to remove excessive ethanol; Finally that the filter cake obtaining after suction filtration is dry in vacuum drying oven, obtain described mineral filler;
(3) preparation of slurry: the ratio that is 0.5～2:1 in mass ratio with the mineral filler of step (2) gained by silicone resin at room temperature mixes, to realize the effective parcel of silicone resin to inorganic powder, finally, 1%～5% the silane coupling agent that adds silicone resin quality, stirs and obtains slurry;
(4) coating applies: the slurry that step (3) is made is coated on the flexible metal parts after step (1) is processed, and is then placed in binder removal 30min at 250 ℃ of temperature of baking oven, is naturally cooled to room temperature and obtains described high-temperature insulation coating.
Wherein, described in step (1), the material of flexible metal parts is nickelalloy, copper, iron, stainless steel etc.
Wherein, inorganic powder described in step (2) is at least one and the nanometer Al in mica powder, talcum powder, titanium dioxide, zinc oxide, asbestos, silicon whisker
2o
3the mixture of powder; Aerogel described in step (2) is hydrophilic group or the hydrophobic group aerogel that supercritical drying prepares.In step (2), filter cake dry temperature in vacuum drying oven is 150-300 ℃, and be 24～36h time of drying.
Silicone resin described in step (3) has mobility, and material is methyl phenyl silicone resin or silicone plastics etc.; Described silane coupling agent is the material that can be combined with inorganic substance and organic resin simultaneously, is specially amino, methyl or ethylsilane coupling agent.
Coating method described in step (4) is silk screen printing, spraying method or spread coating etc.The thickness of the high-temperature insulation coating of step (4) gained is 1～100 μ m.
Beneficial effect of the present invention is:
1, the present invention adopted a kind of easy to operate, technique is simple, cost is low on the parts of flexible metal, prepares the method for the high-temperature insulation coating of heat shock resistance; the sticking power of the coating that the method makes and flexible metal parts is good, can meet the insulation protection demand of the parts that deformation is larger.
2, the high-temperature insulation coating that the present invention prepares has the characteristic of good thermal insulation, insulation, high temperature resistant and heat shock resistance.Coating is constant temperature 20min at 1000 ℃, and coating pattern is without considerable change, without variable color, and flawless, non-structure destroys; The square resistance of coating is greater than 1000M Europe, and insulating property are good.
3, the slurry of high-temperature insulation coating of the present invention obtains for add inorganic powder, aerogel and silane coupling agent in silicone resin, interpolation silane coupling agent can strengthen the cohesiveness of slurry, make coating have better connectivity and the sticking power in flexible metal substrate, increase substantially flexural strength, tensile strength and interlaminar shear strength and the performance such as water-fast, anti-aging of coating; Add aerogel and can improve the high-temperature stability of coating, and utilize the connectivity of the netted Structure Improvement coating in space of aerogel, improve intensity and the thermal shock resistance of coating.
4, the present invention adopts low temperature binder removal can remove organic composition, and solidified coating makes coating at room temperature have higher hardness and realizes good sticking power with flexible metal parts.
5, the present invention adopts the coating method of silk screen printing, can obtain coating thin and that sticking power is good, makes coating at high temperature not easy to crack, and plate-making convenience, low price, technology are easy to grasp simultaneously, are applicable to large-scale production and application.
Accompanying drawing explanation
Fig. 1 is the high-temperature insulation coating that the embodiment of the present invention obtains.
Fig. 2 is the coating picture of the high-temperature insulation coating that obtains of the embodiment of the present invention after 1000 ℃ of high temperature resistant tests.
Embodiment
Below in conjunction with specific embodiment and accompanying drawing, the present invention is elaborated.
Embodiment
The method of preparing the high-temperature insulation coating of heat shock resistance on the parts of flexible metal, comprises the following steps:
(1) clean: first use 600# sand paper to carry out grinding process to the flexible nickel-base strip of 50mm * 10mm, then by the flexible nickel-base strip after polishing successively ultrasonic cleaning 10min in ethanol and acetone soln, after cleaning, take out flexible nickel-base strip, with nitrogen air gun, dry up stand-by;
(2) preparation of mineral filler: the nanometer Al that is 3:1 by mass ratio
2o
3powder and 2000 object talcum powder grind 10min and mix in agate mortar, and hydrophilic group aerogel is ground to 10min in agate mortar, to reduce particle size, increase aerogel specific surface area; Then by ground nanometer Al
2o
3powder, 2000 object talcum powder and hydrophilic group aerogel mix according to the ratio of 3:1:1, in agate mortar, grind 20min, add in 100mL dehydrated alcohol, ultrasonic dispersion 20min, form after the suspension liquid of stable homogeneous, vacuum filtration is to remove excessive ethanol; Finally, by the filter cake obtaining after suction filtration 150 ℃ of dry 24h in vacuum drying oven, obtain described mineral filler;
(3) preparation of slurry: by methyl phenyl silicone resin liquid with mineral filler obtained above in mass ratio for the ratio of 1.2:1 is mixed and stir 10min, realize the effective parcel of methyl phenyl silicone resin to mineral filler, slurry has good mobility simultaneously, add again 2% γ-aminopropyltrimethoxysilane coupling agent of methyl phenyl silicone resin quality, mix and blend 2min, obtains slurry;
(4) coating applies: the slurry that step (3) is made is evenly coated on the flexible nickel-base strip after step (1) is processed, then be placed in baking oven, speed with 15 ℃/s is warming up to 250 ℃, insulation 30min carries out binder removal, and binder removal finishes the rear room temperature that is naturally cooled to and obtains described high-temperature insulation coating.
Fig. 1 is the high-temperature insulation coating that the embodiment of the present invention obtains.As shown in Figure 1, adopt the inventive method in the base band of flexible metal, to make uniform high-temperature insulation coating.
Fig. 2 is the coating picture of the high-temperature insulation coating that obtains of the embodiment of the present invention after 1000 ℃ of high temperature resistant tests.As shown in Figure 2, the high-temperature insulation coating constant temperature 20min at 1000 ℃ that adopts the inventive method to make in the base band of flexible metal, coating pattern is without considerable change, without variable color, flawless, non-structure destroys.At 900 ℃, carry out thermal shock test: in the tube furnace that the coating that the present invention is made pushes rapidly 900 ℃ by room temperature, repeatedly carry out thermal shock test 3 times, coatingsurface has still kept good connectivity, without ablation phenomen, flawless, non-structure destroys, and on substrate, adheres to good.The square resistance of coating is greater than 1000M Europe, and insulating property are good.Adopt high temperature silver slurry to prepare top electrode, using flexible metal base band as lower electrode, after high temperature resistant and thermal shock test, the resistance of coating on thickness direction, still up to 80M Europe, proves that coating has kept good insulation characterisitic.
Claims (9)
1. on the parts of flexible metal, prepare a method for the high-temperature insulation coating of heat shock resistance, it is characterized in that, comprise the following steps:
(1) clean: first flexible metal parts are carried out to grinding process, then first, rear employing ethanol and the acetone flexible metal parts after to polishing clean, clean be placed under nitrogen atmosphere dry;
(2) preparation of mineral filler: the inorganic powder that size is less than to 20 microns grinds 10-20min and mixes, and aerogel is ground to 10-20min; Then the ratio that is 1～10:1 with aerogel according to mass ratio by the inorganic powder after grinding mixes; Mixed inorganic powder and aerogel are added in dehydrated alcohol, ultrasonic being dispersed to after the suspension liquid that forms stable homogeneous, vacuum filtration, the filter cake obtaining is dry in vacuum drying oven, obtains described mineral filler;
(3) preparation of slurry: the ratio that is 0.5～2:1 in mass ratio with the mineral filler of step (2) gained by silicone resin at room temperature mixes, then 1%～5% the silane coupling agent that adds silicone resin quality, stirs and obtains slurry;
(4) coating applies: the slurry that step (3) is made is coated on the flexible metal parts after step (1) is processed, and is then placed in binder removal 30min at 250 ℃ of temperature of baking oven, is naturally cooled to room temperature and obtains described high-temperature insulation coating.
2. the method for preparing the high-temperature insulation coating of heat shock resistance on the parts of flexible metal according to claim 1, is characterized in that, the material of the flexible metal parts described in step (1) is nickelalloy, copper, iron or stainless steel.
3. the method for preparing the high-temperature insulation coating of heat shock resistance on the parts of flexible metal according to claim 1, it is characterized in that, the inorganic powder described in step (2) is at least one and the nanometer Al in mica powder, talcum powder, titanium dioxide, zinc oxide, asbestos, silicon whisker
2o
3the mixture of powder.
4. the method for preparing the high-temperature insulation coating of heat shock resistance on the parts of flexible metal according to claim 1, is characterized in that, the aerogel described in step (2) is hydrophilic group or the hydrophobic group aerogel that supercritical drying prepares.
5. the method for preparing the high-temperature insulation coating of heat shock resistance on the parts of flexible metal according to claim 1, it is characterized in that, the dry temperature in vacuum drying oven of filter cake described in step (2) is 150～300 ℃, and be 24～36h time of drying.
6. the method for preparing the high-temperature insulation coating of heat shock resistance on the parts of flexible metal according to claim 1, is characterized in that, the silicone resin material described in step (3) is methyl phenyl silicone resin or silicone plastics.
7. the method for preparing the high-temperature insulation coating of heat shock resistance on the parts of flexible metal according to claim 1, is characterized in that, the silane coupling agent described in step (3) is amino, methyl or ethylsilane coupling agent.
8. the method for preparing the high-temperature insulation coating of heat shock resistance on the parts of flexible metal according to claim 1, is characterized in that, the coating method described in step (4) is silk screen printing, spraying method or spread coating.
9. the method for preparing the high-temperature insulation coating of heat shock resistance on the parts of flexible metal according to claim 1, is characterized in that, the thickness of the high-temperature insulation coating of step (4) gained is 1～100 μ m.
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| CN201410370394.XA CN104152890B (en) | 2014-07-30 | 2014-07-30 | The method that the high-temperature insulation coating of heat shock resistance is prepared on the component of flexible metal |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107265469A (en) * | 2016-04-08 | 2017-10-20 | 南京唯才新能源科技有限公司 | A kind of surface modifying method of micron order aerogel powder |
| CN107464867A (en) * | 2017-07-14 | 2017-12-12 | 成都新柯力化工科技有限公司 | A kind of preparation method of LED large scale gallium nitride semiconductor pieces |
| CN108504148A (en) * | 2018-05-11 | 2018-09-07 | 长安大学 | A kind of high temperature insulation ceramic coating and preparation method thereof |
| CN108950536A (en) * | 2018-08-01 | 2018-12-07 | 浙江埃普瑞纳米材料有限公司 | The preparation method of nano oxidized aluminium film for circuit board |
| WO2019145352A1 (en) * | 2018-01-23 | 2019-08-01 | Worlee-Chemie Gmbh | Binder composition and use thereof |
| CN110855159A (en) * | 2019-11-29 | 2020-02-28 | 广东美的制冷设备有限公司 | Power encapsulation module, preparation method and computer readable storage medium |
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| CN103525297A (en) * | 2013-10-17 | 2014-01-22 | 电子科技大学 | High-temperature-resistant, adiabatic and insulated coating applied to fuse protector and preparation method of coating |
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Patent Citations (1)
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| CN103525297A (en) * | 2013-10-17 | 2014-01-22 | 电子科技大学 | High-temperature-resistant, adiabatic and insulated coating applied to fuse protector and preparation method of coating |
Non-Patent Citations (3)
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| 李冬云等: "《材料导报》", 25 November 2005 * |
| 杨晔等: "纳米复合Al2O3绝缘涂层的结构及介电性能", 《硅酸盐学报》 * |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107265469A (en) * | 2016-04-08 | 2017-10-20 | 南京唯才新能源科技有限公司 | A kind of surface modifying method of micron order aerogel powder |
| CN107464867A (en) * | 2017-07-14 | 2017-12-12 | 成都新柯力化工科技有限公司 | A kind of preparation method of LED large scale gallium nitride semiconductor pieces |
| WO2019145352A1 (en) * | 2018-01-23 | 2019-08-01 | Worlee-Chemie Gmbh | Binder composition and use thereof |
| WO2019145349A1 (en) * | 2018-01-23 | 2019-08-01 | Worlee-Chemie Gmbh | Binder composition and use thereof |
| EP3743466B1 (en) | 2018-01-23 | 2021-11-17 | Worlée-Chemie GmbH | Binder composition and use thereof |
| EP3743467B1 (en) | 2018-01-23 | 2021-11-17 | Worlée-Chemie GmbH | Binder composition and use thereof |
| US11802217B2 (en) | 2018-01-23 | 2023-10-31 | Worlee-Chemie Gmbh | Binder composition and use thereof |
| CN108504148A (en) * | 2018-05-11 | 2018-09-07 | 长安大学 | A kind of high temperature insulation ceramic coating and preparation method thereof |
| CN108950536A (en) * | 2018-08-01 | 2018-12-07 | 浙江埃普瑞纳米材料有限公司 | The preparation method of nano oxidized aluminium film for circuit board |
| CN110855159A (en) * | 2019-11-29 | 2020-02-28 | 广东美的制冷设备有限公司 | Power encapsulation module, preparation method and computer readable storage medium |
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