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Surface-modified porcelain insulator and preparation method thereof

A porcelain insulator and surface modification technology, which is applied in the field of electric porcelain, can solve the problems of expensive organic polymer materials, poor anti-aging ability, and short service life, and achieve the effects of reducing pollution flashover, low cost, and long service life

Active Publication Date: 2017-08-11
HUNAN RARE EARTH METAL MATERIAL RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, organic polymer materials are expensive, have poor anti-aging ability, are easy to corrode, and have a short service life, which hinders their development.

Method used

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  • Surface-modified porcelain insulator and preparation method thereof
  • Surface-modified porcelain insulator and preparation method thereof
  • Surface-modified porcelain insulator and preparation method thereof

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preparation example Construction

[0021] refer to figure 1 , a method for preparing a surface-modified porcelain insulator in one embodiment, comprising:

[0022] Step S110: dissolving the hydrolyzable titanium source in ethanol to prepare a hydrolyzable titanium source solution.

[0023] Wherein, in this embodiment, the hydrolyzable titanium source may be at least one of butyl titanate, tetraisopropyl titanate and titanium tetrachloride. Preferably, the hydrolyzed titanium source can be butyl titanate.

[0024] Preferably, in the hydrolyzable titanium source solution, the volume ratio of the molar amount of titanium element to ethanol is 0.5˜1.5 mol:1L.

[0025] Step S120: dissolving the nitrate of the rare earth metal element in a mixed solvent of water and ethanol to prepare a solution containing the rare earth metal element.

[0026] In one embodiment, in the solution containing the rare earth metal element, the concentration of the nitrate of the rare earth metal element is 0.05˜0.5 mol / L.

[0027] In...

Embodiment 1

[0045]Add butyl titanate to ethanol at a ratio of 0.5 mol:1 L of titanium element and ethanol, and mix and stir for 30 minutes to prepare a hydrolyzable titanium source solution.

[0046] Mix water and ethanol at a ratio of 1:1 by volume, slowly add 0.5mol / L yttrium nitrate solution according to the molar ratio of titanium element and rare earth metal element in the hydrolyzable titanium source to 100:0.1, adjust with nitric acid Its pH is 4.5, and a solution containing rare earth metal elements is prepared.

[0047] Slowly mix the hydrolyzable titanium source solution and the solution containing rare earth metal elements uniformly under the condition of stirring to form a titanium dioxide-based sol doped with rare earth yttrium.

[0048] The titanium dioxide-based sol doped with rare earth yttrium is coated on the surface of a model C4-80 porcelain insulator by brushing to form a film. Dry at 50°C for 30min, and then heat-treat at 450°C for 4h to obtain a surface-modified po...

Embodiment 2

[0050] Tetraisopropyl titanate was added to ethanol at a ratio of 1.5 mol:1 L of titanium element and ethanol, and mixed and stirred for 60 minutes to prepare a hydrolyzable titanium source solution.

[0051] Mix water and ethanol at a ratio of 1:3 by volume, slowly add 0.05mol / L yttrium nitrate solution according to the molar ratio of titanium element and rare earth metal element in the hydrolyzable titanium source to 100:5, adjust with nitric acid Its pH was adjusted to 5.0, and a solution containing rare earth metal elements was prepared.

[0052] Slowly mix the hydrolyzable titanium source solution and the solution containing rare earth metal elements uniformly under the condition of stirring to form a titanium dioxide-based sol doped with rare earth yttrium.

[0053] The titanium dioxide-based sol doped with rare earth yttrium is coated on the surface of a model C4-80 porcelain insulator by brushing to form a film. Dry at 80°C for 5min, and then heat-treat at 350°C for 2...

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Abstract

The invention relates to a method for preparing a surface-modified porcelain insulator, comprising the following steps: mixing a hydrolyzable titanium source and a solution containing rare earth metal elements for hydrolysis to prepare a rare earth-doped titanium dioxide-based sol; doping the rare earth The titanium dioxide-based sol is coated on the surface of the porcelain insulator, and heat-treated after drying to obtain a surface-modified porcelain insulator. The preparation method coats a layer of rare earth-doped titanium dioxide film on the surface of the porcelain insulator. The superhydrophilicity and photocatalytic activity of the titanium dioxide film make the film surface self-cleaning and easy to clean for a long time, so as to reduce the accumulation of pollution and reduce pollution flashover accidents. Therefore, the anti-pollution performance of the surface of porcelain insulators is improved, and the electrical performance is also improved, which fundamentally reduces the pollution flashover phenomenon caused by surface pollution. In addition, the preparation method has the advantages of simple process, convenient operation and low cost, and the obtained surface-modified porcelain insulator has a long service life and has wide practical application prospects.

Description

technical field [0001] The invention relates to the technical field of electric porcelain, in particular to a surface-modified porcelain insulator and a preparation method thereof. Background technique [0002] Porcelain insulators have always been the most widely used insulating materials in the insulator industry because of their excellent properties such as high stability and corrosion resistance. As the main body of supporting and insulating various electrical equipment, porcelain insulators are generally used to support or suspend high-voltage conductors. When the air humidity is high, or under unfavorable weather conditions such as rain, fog, dew, snow, etc., the dirty layer on the surface of the porcelain insulator is wet, and its surface conductance increases sharply, which causes the leakage current of the porcelain insulator to increase sharply, and the flashover voltage of the porcelain insulator is greatly increased. Reduced, even flashover may occur under the w...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01B19/04H01B17/50
Inventor 吴文花汤杰雄刘吉波王志坚
Owner HUNAN RARE EARTH METAL MATERIAL RES INST
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