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Preparation method of lead-free sealing glass for metal oxide lightning arrester

A technology of oxide and arrester, which is applied in the field of preparation of lead-free sealing glass for metal vapor arrester, can solve problems such as cracking, decrease in residual voltage, and deterioration of arrester protection performance, and achieve low melting temperature and high resistivity , The effect of high sealing strength

Inactive Publication Date: 2006-07-26
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the zinc oxide resistor is easy to react with the moisture in the air, the residual voltage value will drop, which will lead to the deterioration of the protection performance of the arrester, and in severe cases, it will cause cracking and other failures

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0009] Example 1: First, 25% of V by mass percentage 2 o 5 , 23% B 2 o 3 , 48% ZnO and 4% MO 3 Mix evenly; secondly, add the uniformly mixed batch into a corundum crucible or a bisque crucible at 900°C for melting, the melting temperature is 1050°C, and keep warm at the melting temperature for 25 minutes; again, melt the Pour the good glass liquid on a clean steel plate to cool; finally, put the cooled glass into a ball mill jar for ball milling, and pass the milled glass through a 300-mesh sieve. Among them, V 2 o 5 Introduced by analytically pure vanadium pentoxide, B 2 o 3 Introduced by analytically pure boric acid; ZnO introduced by analytically pure zinc oxide, additive MO 3 Introduced by analytically pure molybdenum trioxide.

Embodiment 2

[0010] Example 2: First, 25% of V by mass percentage 2 o 5 , 18% B 2 o 3 , 48% ZnO, 3% P 2 o 5 , 2% Bi 2 o 3 , 3% MO 3 Mix evenly with 1% BaO; secondly, add the uniformly mixed batch into a corundum crucible or bisque crucible at 900°C for melting, the melting temperature is 1100°C, and keep at the melting temperature for 30 minutes; Again, pour the molten glass on a clean steel plate to cool; finally, put the cooled glass into a ball mill jar for ball milling, and pass the milled glass through a 300-mesh sieve. Among them, V 2 o 5 Introduced by analytically pure vanadium pentoxide, B 2 o 3 Introduced by analytically pure boric acid; ZnO introduced by analytically pure zinc oxide, additive P 2 o 5 , Bi 2 o 3 , MO 3 , BaO was introduced by analytically pure ammonium dihydrogen phosphate, bismuth trioxide, molybdenum trioxide, and barium carbonate, respectively.

Embodiment 3

[0011] Example 3: First, 28.5% of V by mass percentage 2 o 5 , 24% B 2 o 3 Mix evenly with 47.5% ZnO; secondly, add the uniformly mixed batch material into a corundum crucible or a bisque crucible at 900°C for melting, the melting temperature is 1000°C, and keep warm at the melting temperature for 20 minutes; Again, pour the molten glass on a clean steel plate to cool; finally, put the cooled glass into a ball mill jar for ball milling, and pass the milled glass through a 300-mesh sieve. Among them, V 2 o 5 Introduced by analytically pure vanadium pentoxide, B 2 o 3 Introduced by analytically pure boric acid; ZnO introduced by analytically pure zinc oxide.

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Abstract

The preparation method for leadless sealing glass in metal-oxide arreaster comprises: mixing evenly all of the 20~30% V2O5, 18~24% B2O3, 45~55% ZnO, 0~3% P2O5, 0~10% Bi2O3, 0~5% MO3 and 0~5%Á€BaO; adding the materials into the corundum crucible or bisque crucible of 900Deg for fusing at 1000~1100Deg and holding for 20~40min; then, putting the cooled glass into a ball grinder; finally, screening the grinded glass with screen of 300 items. This invention has no PbO or alkali metal oxide, needs only low temperature for fusing and sealing, and fit to match seal.

Description

Technical field: [0001] The invention relates to an adhesive used for insulators of ceramics and ZnO arresters, in particular to a preparation method of lead-free sealing glass for metal vapor arresters. Background technique [0002] The key component of the metal oxide arrester is the zinc oxide resistor. Since the zinc oxide resistance sheet is easy to react with the moisture in the air, the residual voltage value will drop, resulting in the deterioration of the protection performance of the arrester, and in severe cases, it will cause cracking and other failures. In order to ensure the safe operation of the arrester and prevent failures, the low-melt lead-free sealing glass material is used to seal the gap between the zinc oxide resistors to prevent the entry of moist air and protect the zinc oxide resistors. The service life of the arrester is improved, and the purpose of safe and reliable operation is achieved. [0003] Japan NGK Insulator (Co., Ltd.) patent USP479614...

Claims

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Application Information

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IPC IPC(8): C03C8/24
CPCC03C3/21
Inventor 郭宏伟刘新年高档妮
Owner SHAANXI UNIV OF SCI & TECH
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