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Sealing connection method of high borosilicate glass tube and copper

A high borosilicate glass and copper sealing technology, which is applied in the field of glass and metal sealing in the solar energy industry, can solve the problems of inability to achieve high borosilicate glass sealing and high melting point of copper, so as to facilitate automatic production, improve temperature resistance, and technology simple effect

Inactive Publication Date: 2013-06-19
无锡旭能光热电能源有限公司
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The expansion coefficient of high borosilicate glass is 3.3, and the forming temperature is about 1200°C, which is higher than the melting point of copper. Therefore, the sealing of high borosilicate glass and copper cannot be realized according to the sealing structure and sealing process of the electric vacuum industry.

Method used

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  • Sealing connection method of high borosilicate glass tube and copper
  • Sealing connection method of high borosilicate glass tube and copper
  • Sealing connection method of high borosilicate glass tube and copper

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Embodiment Construction

[0022] Such as figure 1 The diameter D of the copper sealing part 1 shown is 25mm, and the diameter L is 15mm, such as image 3 The shown borosilicate glass tube 2 has a wall thickness of 1.5mm and an inner diameter of 28mm. The material of the copper sealing part 1 is high-purity oxygen-free copper, wherein O≤0.003%, P≤0.0005%, As≤0.002%; the edge thickness of the copper sealing part 1 is 0.04mm-0.06mm, and the slope of the knife edge is 2°-3°30'.

[0023] The method for sealing the high borosilicate glass tube 2 and the copper sealing member 1 comprises the following steps:

[0024] a) Clean the copper sealing part 1 to remove impurities such as oil stains and oxides on the surface, and then perform high-temperature heat treatment on the copper sealing part 1. The temperature is set at 600°C-650°C, and the holding time is 2-5min. Effectively relieve stress and at the same time play the role of exhaust.

[0025] b) The borosilicate glass tube 2 is ultrasonically cleaned t...

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Abstract

The invention discloses a sealing connection method of a high borosilicate glass tube and copper. The sealing connection method comprises the steps of: firstly cleaning a copper sealing connection piece and the high borosilicate glass tube, preheating the copper sealing connection piece, sheathing the copper sealing connection piece in the high borosilicate glass tube, heating for melting the high borosilicate glass tube, pinching off the high borosilicate glass tube, and folding the high borosilicate glass tube inwards, thereby realizing the sealing connection of glass and the copper sealing connection piece. By virtue of the sealing connection method, the firm sealing connection of the high borosilicate glass tube and the copper is realized; high-temperature melting type sealing connection is adopted, so that the temperature resistance of the sealing connection part is increased; all sealing connection materials are conventional, so that the sealing connection cost is reduced; and simultaneously, the sealing connection technology is simpler than a press sealing technology, the labor intensity is lowered and the automatic production is facilitated.

Description

technical field [0001] The invention belongs to the technical field of glass and metal sealing in the solar energy industry, and in particular relates to a sealing structure and method of high borosilicate glass and copper. Background technique [0002] High borosilicate glass and metal sealing technology has been initially applied in the field of solar energy. [0003] In the traditional solar energy industry, glass and metal sealing generally adopt Kovar and glass sealing technology. In the solid state, it is sealed together by pressure. The sealing temperature of this method is low, the sealing temperature is below the strain point of the glass, the service temperature is limited, the thermal shock resistance is poor, and the vacuum performance of the product is poor due to the inability to perform high-temperature exhaust treatment. The sealing metal of this technology uses iron-nickel-cobalt alloy, which has high price, poor weather resistance of the sealing part, sho...

Claims

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Application Information

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IPC IPC(8): C03C27/00
Inventor 王孝星殷占民马懿于一强金易
Owner 无锡旭能光热电能源有限公司
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