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A kind of preparation method of moisture-proof magnesium oxide powder for insulating cable

A technology of insulating cables and magnesium oxide powder, applied in the directions of magnesium oxide, inorganic insulators, metal oxides, etc., can solve the problems of mineral insulated cables, etc., and achieve the effects of solving short circuits, reducing use costs, and high yield

Active Publication Date: 2017-12-26
久盛电气股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In our country, the development of mineral insulated cables started relatively late. Although many domestic companies can also produce them, there is still a certain gap between them in terms of variety and specifications compared with foreign countries.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Step (1). Add 100g of MgO powder into the beaker, then add 40g of titanate coupling agent, 300g of ethanol solution and 5kg of water into the beaker in sequence, and carry out magnetic stirring at room temperature for 1.5 hours. After dispersion and beating, the powder The particles are fully dispersed;

[0019] Step (2). After stirring the above solution evenly, adjust the pH value of the solution to 6 with glacial acetic acid, put it in a constant temperature water bath at 50° C. for 1 hour, wash and filter to obtain the final product;

[0020] Step (3). The final product is dried and ball milled (the ball milling speed is 5000rph) to obtain moisture-proof magnesium oxide for insulating cables.

[0021] ⑷Insulation resistance performance test:

[0022] Before the test, the resistance performance of the insulated cables can reach more than 2000MΩ. The resistance performance test is carried out under the condition that one end of the cable is not treated with hot melt...

Embodiment 2

[0026] Step (1). Add 200g of MgO powder into the beaker, then add 60g of dodecyltrimethoxysilane, 500g of ethanol solution and 7.5kg of water to the beaker, and stir magnetically for 1 hour at room temperature. After dispersion and beating, Fully disperse the powder particles;

[0027] Step (2). After stirring the above solution evenly, adjust the pH of the solution to 6 with glacial acetic acid, put it in a constant temperature water bath at 60°C for 2 hours, wash and filter to obtain the final product;

[0028] Step (3). The final product is dried and ball milled (the ball milling rate is 6000rph) to obtain moisture-proof magnesium oxide for insulating cables.

[0029] ⑷Insulation resistance performance test:

[0030] Before the test, the resistance performance of the insulated cables can reach more than 2000MΩ. The resistance performance test is carried out under the condition that one end of the cable is not treated with hot melt adhesive, and the damp part is cut off un...

Embodiment 3

[0034] Step (1). Add 300g of MgO powder into the beaker, then add 40g of sodium laurate, 500g of ethanol solution and 7kg of water to the beaker in sequence, and carry out magnetic stirring at room temperature for 1 hour, and disperse and beat to fully disperse the powder particles ;

[0035] Step (2). After stirring the above solution evenly, adjust the pH value of the solution to 5 with glacial acetic acid, put it in a constant temperature water bath at 60°C for 2.5 hours, wash and filter to obtain the final product;

[0036] Step (3). The final product is dried and ball milled (the ball milling rate is 6500rph) to obtain moisture-proof magnesium oxide for insulating cables.

[0037] ⑷Insulation resistance performance test:

[0038] Before the test, the resistance performance of the insulated cables can reach more than 2000MΩ. The resistance performance test is carried out under the condition that one end of the cable is not treated with hot melt adhesive, and the damp par...

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PUM

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Abstract

The invention discloses a preparation method of moisture-proof magnesium oxide powder for insulating cables. The process of the method is to add a certain quality of MgO powder into a beaker, then sequentially add a modifier, an ethanol solution and a certain quality of water, stir magnetically for 1 to 3 hours at normal temperature, and disperse and beat to fully disperse the powder particles. Then adjust the pH value with glacial acetic acid, put it in a constant temperature water bath at 50-80°C for 1-3 hours, wash, filter, dry, and ball mill to obtain moisture-proof magnesium oxide powder for insulating cables. Compared with the existing technology, the present invention is characterized in that: (1) it is prepared by "one-pot method", which has the characteristics of simple operation, mild reaction conditions, no need to separate intermediates, and high yield; The magnesium powder has very strong moisture-proof ability, and compared with untreated magnesium oxide powder, the resistance performance of the insulating cable manufactured by using the magnesium oxide powder treated by the method of the present invention can be increased by more than 8 times.

Description

technical field [0001] The invention relates to the technical field of electrical insulating materials, in particular to a preparation method of moisture-proof magnesium oxide powder for insulating cables. Background technique [0002] With the continuous development of modern buildings, the requirements for electrical equipment used in buildings are getting higher and higher. Mineral insulated power cables have the characteristics of fire resistance, explosion-proof, waterproof, corrosion resistance, mechanical damage resistance, large current carrying capacity, and long life. They are more and more widely used in modern large-scale buildings and Class I and II buildings. Mineral insulated power cables are mainly used in: fire power supply, uninterruptible power supply, fire alarm control, emergency lighting power supply and other power supply lines. [0003] However, since the magnesium oxide crystal powder used as an insulator in mineral insulated cables is a material wi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01F5/02H01B3/10
CPCC01F5/02C01P2006/40H01B3/10
Inventor 姚钰良
Owner 久盛电气股份有限公司