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Zinc oxide resistance piece and preparation method thereof

A zinc oxide resistor sheet, resistor sheet technology, applied in resistor manufacturing, resistors, varistors, etc., can solve the problem of poor insulation ability of inorganic high-resistance layers, shorten the production cycle, save the pre-burning shrinkage process, Energy and cost savings

Inactive Publication Date: 2012-06-13
NINGBO ZHENHAI GUOCHUANG HIGH VOLTAGE ELECTRIC APP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The technical problem to be solved by the present invention is: to fundamentally solve the problem that the inorganic high-resistance layer formed by combining and sintering the existing oxide raw materials generally has poor insulation ability

Method used

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  • Zinc oxide resistance piece and preparation method thereof
  • Zinc oxide resistance piece and preparation method thereof
  • Zinc oxide resistance piece and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～5

[0033] (1) Take 2.3g ZnO, 2g Bi 2 o 3 , 2.5g Sb 2 o 3 , 2.6g SiO 2 , 0.15g B 2 o 3 Mix evenly with 0.45g of mullite, add 20mL of PVA aqueous solution with a mass percent concentration of 2%, and use a planetary ball mill for 24 hours to obtain a slurry with a solid content of 30%.

[0034] (2) Use a coating machine to apply the slurry to the side of the zinc oxide resistor green body. When coating, the zinc oxide resistor green body is rotated for two weeks to ensure the uniformity of the coating. The coating thickness is controlled at 20-35mg / cm 2 . The coated sample was dried at 100°C, and then heated to 1200°C at a heating rate of 150°C / h for 2 hours, and then cooled to room temperature at a cooling rate of 100°C / h to obtain a sintered body, that is, a side with a high resistance layer of zinc oxide resistors.

[0035] The above-mentioned zinc oxide resistor with a high resistance layer on the side was tested for electrical performance and moisture resistance, and...

Embodiment 6～13

[0042] (1) Take 1.8g ZnO, 2.5g Bi 2 o 3 , 2.7g Sb 2 o 3 , 2.5g SiO 2 , 0.18g B 2 o 3 Mix evenly with 0.32g of mullite, add 15mL of PVA aqueous solution with a mass percent concentration of 2%, and use a planetary ball mill for 24 hours to obtain a slurry with a solid content of 40%.

[0043] (2) Apply the slurry to the side of the zinc oxide resistor green body by spraying, and the coating thickness is controlled at 30-50mg / cm 2 . The coated sample was dried at 100°C, then raised to 1200°C at a heating rate of 150°C / h and kept for 2 hours, and then lowered to room temperature at a cooling rate of 100°C / h to obtain a sintered body, that is, a side with a high resistance layer of zinc oxide resistors.

[0044] The above-mentioned zinc oxide resistor with a high resistance layer on the side was tested for electrical performance and moisture resistance, and the results are shown in Table 2 and Table 3.

[0045] Table 2

[0046]

[0047] table 3

[0048]

[0049] A...

Embodiment 14

[0051] (1) Take 0.8g ZnO, 3g Bi 2 o 3 , 2g Sb 2 o 3 , 3.5g SiO 2 , 0.5g B 2 o 3 Mix evenly with 0.2 g of mullite, add 90 mL of methyl cellulose aqueous solution with a mass percent concentration of 1%, and use a planetary ball mill for 10 hours to obtain a slurry with a solid content of 10%.

[0052] (2) Apply the slurry to the side of the zinc oxide resistor green body by dip coating, and the coating thickness is controlled at 7mg / cm 2 . The coated sample was dried at 100°C, then raised to 1100°C at a heating rate of 150°C / h and kept for 2 hours, and then lowered to room temperature at a cooling rate of 100°C / h to obtain a sintered body, that is, a side with a high resistance layer of zinc oxide resistors.

[0053] The above-mentioned zinc oxide resistors with high-resistance layers on the side were tested for electrical performance and moisture resistance, and found that their performance was equivalent to that of the resistors in Examples 1-13, and was significantly...

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Abstract

The invention discloses a zinc oxide resistance piece and a preparation method thereof. The zinc oxide resistance piece comprises a side high-resistance layer, wherein the side high-resistance layer is formed by sintering the following raw materials by mass percent: 5-40% of zinc oxide, 10-40% of bismuth oxide, 10-50% of antimony oxide, 15-50% of silicon dioxide, 0-50% of porzite and 0-10% of boron oxide. The preparation method comprises the step of sintering the prepared slurry along with the resistance piece by one step after coating the prepared slurry at the side face of the resistance piece. The side high-resistance layer has good reaction property with a matrix, consistent shrinkage rate and good dirt resistance and water resistance, can effectively suppress the side flashover of the zinc oxide resistance piece, enhances the stability of the resistance piece and is beneficial to the miniaturization of a lightning arrester. The preparation method of the zinc oxide resistance piece has simple operation, low cost and short production period and is suitable for industrialized production.

Description

technical field [0001] The invention relates to an inorganic resistor, in particular to a zinc oxide resistor and a preparation method thereof. Background technique [0002] Zinc oxide resistors have very superior nonlinear characteristics, and are widely used in power systems as the core component of lightning arresters to protect electrical equipment from overvoltage damage such as lightning. In recent years, with the development of the economy, the requirements for transport capacitance and voltage have been continuously improved, and the requirements for the safety and reliability of power transmission and transformation equipment have also become higher and higher. Therefore, the operation safety and reliability of metal oxide arresters, Light weight and miniaturization put forward higher requirements. [0003] Due to the insufficient insulation strength of the side of the existing zinc oxide resistor, side discharge phenomena such as side flashover and small hole brea...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01C7/112H01C17/30C04B41/87C04B35/14C04B35/185C04B35/453
Inventor 段雷许高杰高奇峰王永晔崔平
Owner NINGBO ZHENHAI GUOCHUANG HIGH VOLTAGE ELECTRIC APP
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