Preparation method of composite ceramic insulating coating

A technology of insulating coatings and composite ceramics, applied in coatings, anti-corrosion coatings, etc., can solve problems such as poor mechanical properties and processability, precision and reliability constraints, and achieve good combination, good processability, adhesion and High filming effect

Inactive Publication Date: 2018-12-07
FOSHAN LINGCHAO NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide a method for preparing a composite ceramic insulating coating in view of the poor mechanical properties and machinability of existing ceramic insulating bearings, which restrict precision and reliability.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0024] Add 30g of boric acid into 300mL of deionized water, stir at 50°C at 300r / min until the boric acid is completely dissolved, then add 100g of urea, continue stirring at 60°C for 30min, stir evenly, put it in a drying oven, and evaporate at 50°C To dryness, the composite material was obtained, and the composite material was placed in a muffle furnace, heated to 900 ° C for 5 h in a nitrogen atmosphere, and after cooling to room temperature, the calcined product was washed twice with hydrochloric acid with a mass fraction of 1%, and then dehydrated with ethanol Wash the calcined product twice, transfer it to a drying oven after washing, and dry it to a constant weight at 55°C to obtain nano-flaky boron nitride. Take 15g of phosphoric acid, add 50mL of deionized water, stir and heat at 300r / min to 50 ℃, add 5g aluminum hydroxide, continue to stir for 10min, add 10g magnesium oxide, 1g nano-sheet boron nitride, 3g silica sol, 3g nano-titanium dioxide after cooling to 40 ℃, co...

example 2

[0026] Add 40g of boric acid into 400mL of deionized water, stir at 55°C at 350r / min until the boric acid is completely dissolved, then add 110g of urea, continue stirring at 62°C for 35min, stir evenly, put it in a drying oven, and evaporate at 55°C To dryness, the composite material was obtained. The composite material was placed in a muffle furnace, heated to 920°C for 5 hours under nitrogen atmosphere, and calcined for 5 hours. After cooling to room temperature, the calcined product was washed twice with hydrochloric acid with a mass fraction of 1%, and then dehydrated with ethanol. Wash the calcined product twice, transfer it to a drying oven after washing, and dry it to a constant weight at 58 ° C to obtain nano-flaky boron nitride. Take 20 g of phosphoric acid, add 80 mL of deionized water, and stir and heat at 350 r / min to 55 ℃, add 8g aluminum hydroxide, continue to stir for 15min, add 12g magnesium oxide, 1g nano-sheet boron nitride, 4g silica sol, 4g nano-titanium di...

example 3

[0028] Add 50g of boric acid into 500mL of deionized water, stir at 60°C at 400r / min until the boric acid is completely dissolved, then add 120g of urea, continue stirring at 65°C for 40min, stir evenly, put it into a drying oven, and evaporate at 60°C To dryness, the composite material was obtained. The composite material was placed in a muffle furnace, heated to 950°C for 6 hours in a nitrogen atmosphere, and calcined for 6 hours. After cooling to room temperature, the calcined product was washed with 1% hydrochloric acid for 3 times, and then dehydrated with ethanol. Wash the calcined product 3 times, transfer it to a drying oven after washing, and dry it to a constant weight at 60°C to obtain nano-flaky boron nitride. Take 25g of phosphoric acid, add 100mL of deionized water, and stir and heat at 400r / min to 60 ℃, add 10g aluminum hydroxide, continue to stir for 20min, add 15g magnesium oxide, 2g nano-flaky boron nitride, 5g silica sol, 5g nano-titanium dioxide after coolin...

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PUM

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Abstract

The invention relates to a preparation method of a composite ceramic insulating coating and belongs to the technical field of insulating coating. Boric acid and urea are used as raw materials to prepare nano-scale lamellar boron nitride; then the nano-scale lamellar boron nitride, aluminium hydroxide, magnesium oxide, silica sol and nanometer titanium dioxide are used to prepare an insulating coating; and by the use of glycol, surface tension of a coating liquid is reduced, surface coating strips can be effectively eliminated, the insulating coating has compact and bright surface, contains notoxic chromium element and has good electrical insulating property, adhesiveness and blanking property and high lamination coefficient and good machinable property, and precision and reliability are improved. The surface of the composite ceramic insulating coating has high insulation resistance, tensile stress to a substrate can be generated, and magnetic domain is refined to reduce iron loss. Theinsulating coating has good bonding with the substrate, insulativity of an oriented silicon steel insulating coating can be effectively enhanced, corrosion current density is reduced, corrosion rateis decreased from the perspective of dynamics, and corrosion resistance of oriented silicon steel is enhanced.

Description

technical field [0001] The invention relates to a preparation method of a composite ceramic insulating coating, which belongs to the technical field of insulating coatings. Background technique [0002] Rolling bearings are important core basic parts in mechanical equipment, and their performance directly affects the quality, performance and reliability of major equipment and host machines, and are often hailed as the heart parts of mechanical equipment. Electric corrosion is one of the common forms of damage to bearings. When current flows through the bearing, it will cause damage to the bearing, greatly reduce the life of the bearing, and cause the bearing to fail in just a few days or even a few hours. For the problem of bearing electric corrosion, the main measures to solve the current problem are to suppress the shaft voltage, short-circuit the bearing and guide the current to flow to the outside or cut off the current path and prevent it from flowing through the bearin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D1/00C09D5/25C09D5/08C09D7/61C09D7/63
CPCC09D1/00C09D5/00C09D5/08C09D7/61C09D7/63C09D7/70
Inventor 裘友玖张桂芳朱华
Owner FOSHAN LINGCHAO NEW MATERIAL CO LTD
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