Glass and kovar connecting structure and low-temperature sintering method

A connection structure and low-temperature sintering technology, applied in welding equipment, welding equipment, auxiliary welding equipment, etc., can solve the problems of low-temperature sintering process, glass tube bursting, high temperature, etc., and achieve no residual stress, good mechanical properties, energy The effect of low consumption

Active Publication Date: 2018-11-02
北京天瑞星光热技术有限公司
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Problems solved by technology

[0002] At present, the known connection methods of glass and Kovar alloy for high-temperature solar collector tubes are mainly high-temperature sealing technology, which is divided into matching sealing and non-matching sealing. The two mainly use 1000°C flame to uniformly heat the joint between glass and Kovar , so that oxygen atoms diffuse evenly on the metal surface to form metal oxides. This chemical bond is similar to that of silicon dioxide in glass, so it can achieve a better connection state, but the disadvantage is that the temperature is high, and residual stress is formed after sealing. It is easy to make the glass tube burst
[0003] The low-temperature sintering material is mainly used for the connection between dissimilar metals. Generally, the two are connected together by sintering, such as copper-aluminum, copper-silver, etc. However, there is no one that can be used for glass-metal connection. Advanced low-temperature sintering process, glass-Kvarar connection can be achieved at a low temperature of 180°C, and can be used well at 400°C

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Embodiment Construction

[0028] Embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but should not be used to limit the scope of the present invention.

[0029] In the description of the present invention, unless otherwise stated, the meaning of "plurality" is two or more; the terms "upper", "lower", "left", "right", "inner", "outer" , "front end", "rear end", "head", "tail", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than Nothing indicating or implying that a referenced device or element must have a particular orientation, be constructed, and operate in a particular orientation should therefore not be construed as limiting the invention. In the descrip...

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Abstract

The invention discloses a glass and kovar connecting structure. The glass and kovar connecting structure comprises a high-boron solar heat collecting glass tube and a kovar alloy tube, wherein the kovar alloy tube is inserted into the high-boron solar heat collecting glass tube, a micron kovar soldering paste layer is arranged at the joint on the outer side of the kovar alloy tube, a copper plating layer is arranged at the joint on the inner side of the high-boron solar heat collecting glass tube, and the micron kovar soldering paste layer is connected with the copper plating layer and prepared from components in percentage by mass as follows: 60wt%-70wt% of Fe-Co-Ni alloy particles, 20wt%-30wt% of an adhesive and 5wt%-10wt% of 90%-95% ethanol. The technical scheme has beneficial effects as follows: with the creative application of a low-temperature sintering method, micron kovar soldering paste is taken as an intermediate material, glass-kovar sealing connection is realized, and the structure is reliable at high temperature, free of residual stress and good in mechanical property.

Description

technical field [0001] The invention relates to the technical field of solar high-temperature heat collecting tubes, in particular to a connection structure between glass and Kovar and a low-temperature sintering method. Background technique [0002] At present, the known connection methods of glass and Kovar alloy for high-temperature solar collector tubes are mainly high-temperature sealing technology, which can be divided into matching sealing and non-matching sealing. The two mainly use 1000°C flame to uniformly heat the joint between glass and Kovar , so that oxygen atoms diffuse evenly on the metal surface to form metal oxides. This chemical bond is similar to that of silicon dioxide in glass, so it can achieve a better connection state, but the disadvantage is that the temperature is high, and residual stress is formed after sealing. It is easy to make the glass tube burst. [0003] The low-temperature sintering material is mainly used for the connection between diss...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K33/00B23K31/02B23K37/00
CPCB23K31/02B23K33/00B23K37/00
Inventor 闫超一曹明刚张磊王静杨兴范兵丁晓波
Owner 北京天瑞星光热技术有限公司
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