Glass metal bonding sealing process based on force thermoelectric coupling condition
A glass-to-metal, thermoelectric coupling technology, applied in the field of glass-to-metal sealing technology, can solve problems such as unusable, inapplicable, and no successful cases, and achieve low air leakage, high production efficiency, high vacuum and heat collection performance Effect
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[0034] Example 1
[0035] Before sealing: Polish, level, clean and dry the end surface of the glass nozzle of the solar vacuum collector tube (conventional technology) to ensure the smoothness of the bonding surface. Polishing, leveling, cleaning and drying (conventional technology) of metal sheet 4 (round Kovar alloy sheet, which can be closed with the glass nozzle of the solar vacuum heat collection tube, and the shape matches) to ensure the bonding surface Bright and clean.
[0036] Such as figure 1 As shown, the end face of the glass nozzle 6 of the solar vacuum heat collection tube is clamped and fixed with a fixture 8 (conventional fixture), and then the middle aluminum solder is stacked. The middle aluminum solder is in a ring shape and is connected to the solar vacuum heat collection tube. The shape of the end face of the glass nozzle is matched, and the thickness is 1-5μm (2μm is used in this embodiment). Finally, the Kovar alloy sheet is covered, and the entire glass sur...
Example Embodiment
[0038] Example 2
[0039] Before sealing: Polish, level, clean and dry the end surface of the glass nozzle of the solar vacuum collector tube (conventional technology) to ensure the smoothness of the bonding surface. Polishing, leveling, cleaning and drying (conventional technology) of metal sheet (round aluminum sheet, no special requirements for thickness, which can be covered with the glass nozzle of solar vacuum heat collection tube, shape matching) to ensure bonding Smooth surface.
[0040] The end of the glass nozzle of the solar evacuated heat collection tube is clamped and fixed with a clamp 8 (conventional clamp), and then covered with an aluminum sheet, placed under vacuum conditions, and the entire glass surface (that is, the glass of the solar evacuated heat collection tube) The end face of the nozzle) and the aluminum sheet are horizontally attached, and the temperature field (realized by electric heating) is raised from room temperature, and the heating rate is 0.1-5...
Example Embodiment
[0042] Example 3
[0043] Before sealing: Polish, level, clean and dry the end surface of the glass nozzle of the solar vacuum collector tube (conventional technology) to ensure the smoothness of the bonding surface. Polish, level, clean and dry the metal sheet (round Kovar alloy sheet, which can be closed with the glass tube mouth of the solar vacuum heat collection tube, and the shape matches) to ensure the smoothness of the bonding surface .
[0044] The end face of the glass nozzle of the solar evacuated heat collection tube is clamped and fixed with clamp 8 (conventional fixture), and then the Kovar alloy sheet is covered, and the entire glass surface (that is, the end face of the glass nozzle of the solar evacuated heat collection tube) ) And the Kovar alloy sheet are attached horizontally, the temperature field (realized by electric heating) starts to rise from room temperature, the heating rate is 0.1-5°C / min, the heating rate in this embodiment is 3°C / min, the temperature...
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