Ultra-thin silicon steel surface insulating coating and preparation method thereof

A technology of insulating coating and silicon steel, applied in the direction of coating, fireproof coating, etc., can solve the problems of poor adhesion on the surface of ultra-thin silicon steel, thick insulating coating on the surface of oriented silicon steel, etc., achieve excellent adhesion performance, meet strong vibration, guarantee The effect of insulation performance

Active Publication Date: 2018-10-16
GLOBAL ENERGY INTERCONNECTION RES INST CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem solved by the present invention is the defect that the existing oriented silicon steel surface insulating coating is relatively thick and has poor adhesion to the ultra-thin silicon steel surface without glass film, and further provides a 0.7-1 μm thick, high adhesion, Insulation coating on the surface of ultra-thin silicon steel without glass film, high insulation resistance, high temperature annealing resistance, and preparation method thereof

Method used

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  • Ultra-thin silicon steel surface insulating coating and preparation method thereof
  • Ultra-thin silicon steel surface insulating coating and preparation method thereof
  • Ultra-thin silicon steel surface insulating coating and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0051] This embodiment provides an insulating coating, and its raw material composition is: 75g of magnesium dihydrogen phosphate, 1.2g of titanium nitride, 3g of boric acid, 10g of silica sol, 0.12g of magnesium stearate, and 0.06g of modified polysiloxane , silicone resin 3g, deionized water 7.62g. Wherein, magnesium dihydrogen phosphate is obtained by reacting phosphoric acid with an initial concentration of 23 wt% and magnesium oxide of 8 wt% in deionized water.

[0052] The insulating coating of this embodiment is obtained by the following method: stir and mix deionized water and silica sol evenly, let it stand for 30 minutes, and then add magnesium dihydrogen phosphate, boric acid, titanium nitride, silicone resin, and stearic acid in sequence Magnesium, modified polysiloxane, each component is fully stirred by an automatic mixer during the addition process to ensure that the coating liquid is mixed evenly and the suspended particles are dispersed. After each component i...

Embodiment 2

[0057] This embodiment provides an insulating coating, and its raw material composition is: 70g of magnesium dihydrogen phosphate, 0.8g of titanium nitride, 2g of boric acid, 12g of silica sol, 0.12g of AFCONA-4530, 0.06g of dimethylsiloxane, Film-forming resin 3g, deionized water 12.02g. Wherein, magnesium dihydrogen phosphate is obtained by reacting phosphoric acid with an initial concentration of 20 wt% and magnesium oxide of 5 wt% in deionized water.

[0058] The insulating coating of this embodiment is obtained by the following method, stir and mix deionized water and silica sol evenly, let it stand for 30 minutes, and then add magnesium dihydrogen phosphate, boric acid, titanium nitride, film-forming resin, and dispersant in sequence , defoaming agent, each component is added with an automatic mixer to fully stir to ensure that the coating liquid is mixed evenly and the suspended particles are dispersed. After each component is added, it is left to stand for 30 minutes, ...

Embodiment 3

[0063] This embodiment provides an insulating coating, the raw materials of which are composed of 78g of magnesium dihydrogen phosphate, 0.5g of titanium nitride, 2.2g of boric acid, 5g of silica sol, 0.09g of oxidized polyethylene wax, 0.06g of AFCONA-2592, and Resin 2.5g, deionized water 11.65g. Wherein, magnesium dihydrogen phosphate is obtained by reacting phosphoric acid with an initial concentration of 30 wt% and magnesium oxide of 15 wt% in deionized water.

[0064] The insulating coating of this embodiment is obtained by the following method, stir and mix deionized water and silica sol evenly, let it stand for 30 minutes, and then add magnesium dihydrogen phosphate, boric acid, titanium nitride, film-forming resin, and dispersant in sequence , defoaming agent, each component is added with an automatic mixer to fully stir to ensure that the coating liquid is mixed evenly and the suspended particles are dispersed. After each component is added, it is left to stand for 30...

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Abstract

The invention belongs to the technical field of coating compositions, in particular to an ultra-thin silicon steel surface insulating coating and a preparation method thereof. The insulating coating provided by the invention is prepared from the following components: 65 to 85 parts of magnesium dihydrogen phosphate, 0.1 to 1.5 parts of insulating inorganic nanoparticles, 2 to 15 parts of silica sol, 2 to 4 parts of boric acid and 1 to 32.9 parts of deionized water. The coating formed by synergistic effects of all the components has excellent adhesion property to the surface of a bare steel sheet of ultra-thin silicon steel, and meanwhile, the insulation performance is ensured. The insulating coating provided by the invention is also prepared from 0.01 to 5 parts by weight of organic resin;by the addition of the organic resin, the adhesion of the ultra-thin silicon steel surface coating can be improved and subsequent high temperature sintering can be resisted, so that the ultra-thin silicon steel with the coating can be suitable for preparing a roll core of a saturation reactor, and further complex operating conditions such as strong vibration and high temperature rise of high pressure anode saturation reactors are met.

Description

technical field [0001] The invention belongs to the technical field of coating compositions, and in particular relates to an insulating coating on the surface of silicon steel and a preparation method thereof. Background technique [0002] The converter valve is the core equipment of the DC transmission project. It obtains the desired DC voltage by sequentially connecting the three-phase AC voltage to the DC terminal, and realizes power control. The converter valve is equipped with a thyristor and a saturable reactor, among which the thyristor is a key component that determines the flow capacity of the converter valve, and the saturable reactor is a reactive power compensation device that can suppress the sudden rise of current in the valve due to the conduction of the element , and smooth the surge current caused by the fault in the line, so as to avoid burning the thyristor components and protect the thyristor. The key component in the saturable reactor is the wound iron ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D1/00C09D5/25C09D7/61C09D7/65
CPCC09D1/00C09D5/00C09D5/18C09D7/61C09D7/65
Inventor 程灵杨富尧韩钰马光高洁吴雪刘洋何承绪陈保安樊超聂京凯陈新
Owner GLOBAL ENERGY INTERCONNECTION RES INST CO LTD
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