CN109135385B - Preparation method of linear resistor insulating coating - Google Patents
Preparation method of linear resistor insulating coating Download PDFInfo
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- CN109135385B CN109135385B CN201810883881.4A CN201810883881A CN109135385B CN 109135385 B CN109135385 B CN 109135385B CN 201810883881 A CN201810883881 A CN 201810883881A CN 109135385 B CN109135385 B CN 109135385B
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- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
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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
Abstract
The invention discloses a preparation method of a linear resistor insulating coating, which is prepared by taking various high-quality raw materials of Zuoyun soil, chromium oxide, calcium sulfate and zinc oxide as main materials, adding aluminum dihydrogen phosphate and deionized water, and mixing. According to the invention, ZnO powder is added into the raw material, aluminum dihydrogen phosphate is used as a curing binder, moisture in the insulating coating is removed through the insulating coating curing process, and meanwhile, the strength of the insulating coating is increased, so that the linear resistance insulating coating has high folding resistance, high compression resistance and excellent hydration resistance, and the service life and the quality of the linear resistance insulating coating are improved. The preparation process of the insulating coating is simple and easy to operate, and the raw materials are nontoxic, pollution-free and easy to obtain. The prepared insulating coating is easy to coat, good in insulating property, high in coating strength and not easy to fall off, and the coating does not influence the resistivity and the linearity of the linear resistance element. The insulating coating successfully achieves the protection effect on the linear resistance element.
Description
Technical Field
The invention relates to a resistor preparation method, in particular to a linear resistor preparation method, which is applied to the technical field of resistance electrical elements.
Background
The linear resistor is an electric element which is visible everywhere in real life, and is commonly used as a metal resistor, a carbon resistor and a ZnO ceramic resistor. However, in practical applications, the linear resistor also lacks an effective coating to protect the linear resistor element, thereby prolonging the service life of the linear resistor element and enabling the linear resistor to be applied in more fields. The existing linear resistor has no good insulating protective layer, cannot play a role in protecting a linear resistor element, and simultaneously influences the electrical device performances such as the resistivity, the linearity and the like of the linear resistor.
Disclosure of Invention
In order to solve the problems of the prior art, the invention aims to overcome the defects in the prior art and provide a preparation method of a linear resistor insulating coating, which can prepare the insulating coating with high strength and good insulating property, does not change the resistivity and the linearity of a linear resistor, and can achieve the purpose of protecting elements so as to meet the application requirements of more occasions. The invention has simple process, easy control and low cost.
In order to achieve the purpose, the invention adopts the following technical scheme:
a preparation method of a linear resistance insulating coating comprises the following specific steps:
a. taking the levo-cloud soil powder, the chromium oxide powder, the calcium sulfate powder and the zinc oxide powder as powder raw materials, mixing the levo-cloud soil powder, the chromium oxide powder, the calcium sulfate powder and the zinc oxide powder with dispersant deionized water, performing ball milling for at least 1h, then adding aluminum dihydrogen phosphate or aluminum dihydrogen phosphate aqueous solution after the powder raw materials are uniformly mixed, and performing ball milling for 0.5-1h to prepare coating slurry;
b. uniformly applying the coating paste prepared in the step a onto a linear resistance element;
c. and c, heating and curing the linear resistor element coated with the coating slurry in the step b to obtain the linear resistor insulating coating.
In a preferred embodiment of the present invention, in the step a, the ratio of each of the left bentonite powder, the chromium oxide powder, the calcium sulfate powder, and the zinc oxide powder to the total mass of the powder raw materials is as follows:
the weight percentage of the Zuoyun soil powder is 80-90%;
the mass percentage of the chromium oxide powder is 5-15%;
the mass percentage of the calcium sulfate powder is 0.5-5%;
the zinc oxide powder accounts for 0.5-5% of the total weight of the zinc oxide powder.
Preferably, the mass ratio of the levo-cloud soil powder to the chromium oxide powder to the calcium sulfate powder to the zinc oxide powder is (75-87): 10-16): 2-3): 1.
As a preferred technical solution of the present invention, in the step a, when the aluminum dihydrogen phosphate aqueous solution is mixed with the powder raw material to prepare the coating slurry, the mass percentage concentration of the aluminum dihydrogen phosphate aqueous solution is preferably not higher than 83.3 wt.%, and the mass ratio of the aluminum dihydrogen phosphate aqueous solution to the total mass of the powder raw material is 1 (1-2); the mass ratio of the deionized water of the dispersing agent to the total mass of the powder material is preferably 5 (4-9). When aluminum dihydrogen phosphate and powder raw materials are mixed to prepare coating slurry, the adding amount of the aluminum dihydrogen phosphate is preferably 6: (300-500) are mixed. Before ball milling of the powder raw material, preferably adding an auxiliary dispersant when the powder raw material is mixed with dispersant deionized water, wherein the addition amount of the auxiliary dispersant is 3: (5-6) in the above ratio.
In the step b, the coating slurry ball-milled in the step a is poured out, and then is sieved by a 120-mesh sieve to obtain the coating slurry with uniform particle size, and the sieved coating slurry is uniformly applied on the linear resistor element. The coating slurry is uniformly applied to the linear resistance element, and the difference in mass of the linear resistance element before and after coating is preferably controlled to not less than 1.5 g.
As a preferable technical scheme of the invention, in the step c, the temperature for heating and curing the coating slurry is 200-500 ℃, and the heating, curing and heat preservation time is 1-3 h. It is further preferable that the temperature for heat curing of the coating slurry is 230-400 ℃.
Compared with the prior art, the invention has the following obvious and prominent substantive characteristics and remarkable advantages:
1. according to the method, ZnO powder is added into the raw material, aluminum dihydrogen phosphate is used as a curing binder, moisture in the insulating coating is removed through the insulating coating curing process, and meanwhile, the strength of the insulating coating is increased, so that the linear resistance insulating coating has high folding resistance, high compression resistance and excellent hydration resistance, and the service life and the quality of the linear resistance insulating coating are improved;
2. the preparation method of the linear resistor insulating coating has the advantages of simple process, easy operation, short preparation time, and no toxicity or pollution of the used raw materials;
3. the coating prepared by the method has good insulation property, high strength and difficult shedding, does not change the resistivity and the linearity of the linear resistor, and can play a role in protecting the linear resistor.
The above-described scheme is further illustrated below with reference to specific embodiments, which are detailed below:
example one
In this embodiment, a method for preparing a linear resistance insulating coating includes the following specific steps:
a. 435g of Zuoyun soil powder and 50g of Cr are taken2O3Powder, 10g CaSO4·2H2Mixing the powder raw material with 3g of auxiliary dispersant and 600g of dispersant deionized water, adding the mixture into a ball mill, carrying out ball milling for 1h, then adding 250g of aluminum dihydrogen phosphate into a ball milling tank after the powder raw material is uniformly mixed, and continuing ball milling for 1h to prepare coating slurry;
b. pouring out the coating slurry ball-milled in the step a, then sieving the coating slurry with a 120-mesh sieve to obtain coating slurry with uniform particle size, uniformly applying the sieved coating slurry on the side surface of the ZnO linear resistance element to form a side surface coating layer for the ZnO linear resistance element, and controlling the mass difference of the ZnO linear resistance element before and after coating to be 1.5 g;
c. and c, drying the coating slurry of the ZnO linear resistor element coated with the coating slurry in the step b, and then heating and curing the coating slurry at the temperature of 230 ℃ for 3h to obtain the ZnO linear resistor insulating coating.
The linear resistor insulating coating is prepared by taking various high-quality raw materials of Zuoyun soil, chromic oxide, calcium sulfate and zinc oxide as main materials, adding aluminum dihydrogen phosphate and deionized water, and mixing. The insulating coating can play a role in protecting the linear resistance element in practical application, and meanwhile, the resistivity and the linearity of the linear resistance are not changed. The preparation method of the ZnO linear resistor insulating coating is simple, the coating is non-toxic and pollution-free, the insulating property is good, the strength is high, the coating is not easy to fall off, and the resistivity and the linearity of the linear resistor are not changed, so that the aim of well protecting the ZnO linear resistor can be fulfilled. In the embodiment, ZnO powder is added into the raw material, aluminum dihydrogen phosphate is used as a curing binder, and the insulating coating curing process is adopted to remove moisture in the insulating coating and increase the strength of the insulating coating, so that the ZnO linear resistance insulating coating has high folding resistance, high compression resistance and excellent hydration resistance, and the service life and the quality of the ZnO linear resistance insulating coating are improved.
Example two
This embodiment is substantially the same as the first embodiment, and is characterized in that:
in this embodiment, a method for preparing a linear resistance insulating coating includes the following specific steps:
a. taking 400g of left cloud soil powder and 80g of Cr2O3Powder, 15g CaSO4·2H2Mixing the powder raw material with 3g of auxiliary dispersant and 650g of dispersant deionized water, adding the mixture into a ball mill, carrying out ball milling for 1h, then adding 332g of aluminum dihydrogen phosphate into the ball milling tank after the powder raw material is uniformly mixed, and continuing ball milling for 0.5h to prepare coating slurry;
b. pouring out the coating slurry ball-milled in the step a, then sieving the coating slurry with a 120-mesh sieve to obtain coating slurry with uniform particle size, uniformly coating the sieved coating slurry on the side surface of the metal linear resistance element to form a side surface coating layer for the metal linear resistance element, and controlling the mass difference of the linear resistance element before and after coating to be 1.5 g;
c. and c, drying the coating slurry of the metal linear resistance element coated with the coating slurry in the step b, and heating and curing the coating slurry at 250 ℃ for 2h to obtain the metal linear resistance insulating coating.
The linear resistor insulating coating is prepared by taking various high-quality raw materials of Zuoyun soil, chromic oxide, calcium sulfate and zinc oxide as main materials, adding aluminum dihydrogen phosphate and deionized water, and mixing. The insulating coating can play a role in protecting the linear resistance element in practical application, and meanwhile, the resistivity and the linearity of the linear resistance are not changed. The preparation method of the metal resistor insulating coating is simple, the coating is non-toxic and pollution-free, the insulating property is good, the strength is high, the coating is not easy to fall off, and the resistivity and the linearity of the linear resistor are not changed, so that the purpose of well protecting the metal resistor can be achieved. In the embodiment, ZnO powder is added into the raw material, aluminum dihydrogen phosphate is used as a curing binder, and the insulating coating curing process is adopted to remove moisture in the insulating coating and increase the strength of the insulating coating, so that the metal linear resistance insulating coating has high folding resistance, high compression resistance and excellent hydration resistance, and the service life and the quality of the metal linear resistance insulating coating are improved.
EXAMPLE III
This embodiment is substantially the same as the previous embodiment, and is characterized in that:
in this embodiment, a method for preparing a linear resistance insulating coating includes the following specific steps:
a. taking 450g of Zuoyun soil powder and 60g of Cr2O3Powder, 12g CaSO4·2H2Mixing the powder raw material with 3g of auxiliary dispersant and 560g of dispersant deionized water, adding the mixture into a ball mill, carrying out ball milling for 1h, then adding 500g of aluminum dihydrogen phosphate and 100g of deionized water into a ball milling tank after the powder raw material is uniformly mixed, and continuing ball milling for 0.5h to prepare coating slurry;
b. pouring out the coating slurry ball-milled in the step a, then sieving the coating slurry with a 120-mesh sieve to obtain coating slurry with uniform particle size, uniformly applying the sieved coating slurry on the side surface of the carbon-based linear resistance element to form a side surface coating layer for the carbon-based linear resistance element, and controlling the mass difference of the carbon-based linear resistance element before and after coating to be 1.5 g;
c. and c, drying the coating slurry of the carbon-based linear resistance element coated with the coating slurry in the step b, heating and curing the coating slurry at the temperature of 400 ℃ for 1h to obtain the carbon-based linear resistance insulating coating.
The linear resistor insulating coating is prepared by taking various high-quality raw materials of Zuoyun soil, chromic oxide, calcium sulfate and zinc oxide as main materials, adding aluminum dihydrogen phosphate and deionized water, and mixing. The insulating coating can play a role in protecting the linear resistance element in practical application, and meanwhile, the resistivity and the linearity of the linear resistance are not changed. The preparation method of the carbon resistor insulating coating is simple, the coating is non-toxic and pollution-free, the insulating property is good, the strength is high, the coating is not easy to fall off, and the resistivity and the linearity of the linear resistor are not changed, so that the carbon resistor insulating coating can be well protected. In the embodiment, ZnO powder is added to the raw material, aluminum dihydrogen phosphate is used as a curing binder, and the insulating coating curing process is adopted to remove moisture in the insulating coating and increase the strength of the insulating coating, so that the carbon-based linear resistance insulating coating has high folding resistance, high compression resistance and excellent hydration resistance, and the service life and the quality of the carbon-based linear resistance insulating coating are improved.
In summary, according to the preparation method of the insulating coating of the linear resistor in the embodiment of the invention, the preparation process of the insulating coating is simple and easy to operate, and the raw materials are nontoxic, pollution-free and easy to obtain. The prepared insulating coating is easy to coat, good in insulating property, high in coating strength and not easy to fall off, and the coating does not influence the resistivity and the linearity of the linear resistance element. The insulating coating successfully achieves the protection effect on the linear resistance element.
While the embodiments of the present invention have been described, the present invention is not limited to the above embodiments, and various changes, modifications, substitutions, combinations or simplifications made according to the spirit and principle of the technical solution of the present invention may be made in the form of equivalent substitutions without departing from the technical principle and inventive concept of the method for preparing the linear resistance insulation coating according to the present invention.
Claims (6)
1. A preparation method of a linear resistance insulating coating is characterized by comprising the following specific steps:
a. taking the levo-cloud soil powder, the chromium oxide powder, the calcium sulfate powder and the zinc oxide powder as powder raw materials, mixing the levo-cloud soil powder, the chromium oxide powder, the calcium sulfate powder and the zinc oxide powder with a dispersing agent and deionized water, performing ball milling for at least 1h, then adding aluminum dihydrogen phosphate or an aqueous solution of aluminum dihydrogen phosphate after the powder raw materials are uniformly mixed, and performing ball milling for 0.5-1h to prepare coating slurry; the left cloud soil powder, the chromium oxide powder, the calcium sulfate powder and the zinc oxide powder respectively account for the following percentage of the total mass of the powder raw materials:
the weight percentage of the Zuoyun soil powder is 80-90%;
the mass percentage of the chromium oxide powder is 5-15%;
the mass percentage of the calcium sulfate powder is 0.5-5%;
the zinc oxide powder accounts for 0.5-5% of the total weight;
the mass ratio of the left cloud soil powder to the chromium oxide powder to the calcium sulfate powder to the zinc oxide powder is (75-87): 10-16): 2-3): 1;
b. uniformly applying the coating paste prepared in the step a onto a linear resistance element;
c. and c, heating and curing the linear resistor element coated with the coating slurry in the step b, controlling the heating and curing temperature of the coating slurry to be 230-400 ℃, carrying out heating, curing and heat preservation for 1-3h, and removing moisture in the insulating coating through the insulating coating curing process to obtain the insulating coating of the linear resistor.
2. The method of preparing a linear resistive insulating coating according to claim 1, wherein: in the step a, when the aluminum dihydrogen phosphate aqueous solution is mixed with the powder raw materials to prepare the coating slurry, the mass percentage concentration of the aluminum dihydrogen phosphate aqueous solution is not higher than 83.3wt%, and the mass ratio of the aluminum dihydrogen phosphate aqueous solution to the total mass of the powder raw materials is 1 (1-2); the mass ratio of the dispersing agent to the deionized water to the total mass of the powder raw materials is 5 (4-9).
3. The method of preparing a linear resistive insulating coating according to claim 1, wherein: in the step a, when aluminum dihydrogen phosphate and powder raw materials are mixed to prepare coating slurry, the adding amount of the aluminum dihydrogen phosphate is that the mass ratio of the aluminum dihydrogen phosphate to the zinc oxide powder in the powder raw materials is 6: (300-500) are mixed.
4. The method of preparing a linear resistive insulating coating according to claim 1, wherein: in the step a, before ball milling of the powder raw material, when the powder raw material is mixed with dispersant deionized water, an auxiliary dispersant is added, wherein the addition amount of the auxiliary dispersant is 3: (5-6) in the above ratio.
5. The method of preparing a linear resistive insulating coating according to claim 1, wherein: in the step b, the coating slurry ball-milled in the step a is firstly poured out, then is sieved by a 120-mesh sieve to obtain the coating slurry with uniform granularity, and the sieved coating slurry is uniformly applied on the linear resistance element.
6. The method of preparing a linear resistive insulating coating according to claim 1, wherein: in said step b, the coating slurry is uniformly applied to the linear resistance element, and the difference in mass of the linear resistance element before and after coating is controlled to not less than 1.5 g.
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| JPS581704B2 (en) * | 1980-09-24 | 1983-01-12 | 中国塗料株式会社 | Anticorrosive paint composition |
| WO1995033688A1 (en) * | 1994-06-06 | 1995-12-14 | Nippon Shokubai Co., Ltd. | Fine zinc oxide particles, process for producing the same, and use thereof |
| CN102101961B (en) * | 2010-12-30 | 2012-12-19 | 上海迪升防腐新材料科技有限公司 | Organic-inorganic environment-friendly insulating coating solution and application thereof |
| CN102295878A (en) * | 2011-07-06 | 2011-12-28 | 上海大学 | Fill-type thermal conductive insulation impregnating varnish |
| CN102732132B (en) * | 2012-06-20 | 2014-08-06 | 武汉工程大学 | Environment-friendly insulation paint used on non-oriented electrical steel, and preparation method thereof |
| CN103013195A (en) * | 2012-12-18 | 2013-04-03 | 南京航空航天大学 | Semi-inorganic environment-friendly insulating paint for non-oriented silicon steel and coating preparation method thereof |
| CN104449011A (en) * | 2014-12-04 | 2015-03-25 | 中航锂电（洛阳）有限公司 | Lithium ion battery insulating coating, preparation method and pole piece and lithium ion battery using insulating coating |
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