Brazing method for water-loaded isolating square ceramic sheets

Abstract

The invention discloses a brazing method of a water-loaded isolated square ceramic sheet, comprising: a brazing method of a water-loaded isolated square ceramic sheet, comprising: step 1: putting the square ceramic sheet (4) into a square waveguide inside the tube (3); step 2: fixing the bow-shaped block (1) on the outer wall of the square waveguide (3); step 3: brazing the square ceramic sheet (4) and the square waveguide (3) with brazing solder The square waveguide (3); wherein, the arcuate block (1) is an expanded alloy block and the outer side of the arcuate block (1) is wound with a wire so that the arcuate block (1) is close to the square waveguide On the outer wall of the waveguide (3), the expansion coefficient of the metal wire is less than 6×10-6 / °C and the melting point is not lower than 2000°C. The brazing method makes the square waveguide in the water load more closely welded to the square ceramic sheet, and improves the vacuum airtightness of the brazing of the isolated ceramic sheet.

Description

technical field [0001] The invention relates to a brazing method of water-loaded isolated square ceramic sheets. Background technique [0002] The medical linear accelerator is a microwave vacuum device that transmits microwave energy to electrons through the action of an electromagnetic field. After the electrons obtain microwave energy, they accelerate and bombard the tungsten target to generate X-rays. A large amount of microwave energy is transmitted to electrons, but some energy is not absorbed by electrons. If this part of energy is not disposed of, there will be microwave radiation, which will cause adverse effects on the environment. Therefore, with a water load, the remaining microwave energy is absorbed by the flowing water, converted into heat and consumed. The other end of the water load is filled with high-voltage insulating gas, so it is necessary to isolate the flowing water from the high-pressure insulating gas. While isolating water, microwaves are require...

AI Technical Summary

Problems solved by technology

The reliable sealing connection between ceramics and metals is brazing, but the square waveguide is made of oxygen-free copper, and the expansion coefficient of oxygen-free copper is much larger than that of ceramics. It is difficult to match when brazing, so the connection between ceramics and oxygen-free copper There are often problems with the welding strength and quality of the welding, and air leakage is prone to occur when it is subjected to more than two atmospheric pressures; if the isolation ceramic sheet leaks, it will directly lead to damage to the microwave vacuum device

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