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Method for preparing glass solder for ceramic-stainless steel sealing

A technology of glass solder and stainless steel, which is applied in the field of preparation of glass solder for ceramic-stainless steel sealing, which can solve the problems of large initial investment, high equipment maintenance costs, and high equipment requirements

Inactive Publication Date: 2009-06-17
曾松
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

However, in this method, the heating temperature is too high, which consumes a lot of energy and has high requirements for equipment, which makes the initial investment large and the equipment maintenance cost is high.

Method used

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Examples

Experimental program
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Effect test

Embodiment Construction

[0011] The raw materials for preparing glass solder will generally release a certain amount of water and gas at a temperature below 900°C. If the raw materials are mixed and sealed directly, not only will it not be easy to wet the porcelain and metal surfaces, but the glass layer will also easily form pores. As a result, the sealing strength is reduced, so glass powder is generally prepared first, and then ball milled to make glass solder.

[0012] First smash the ordinary window glass;

[0013] Then, in the planetary ball mill, carry out wet grinding with ordinary window glass: grinding ball: water = 1:2:1 (weight ratio) to form glass powder with an average particle size of 3-5 μm;

[0014] Finally, it is dried at a temperature of 120° C. in an electric constant temperature blast drying oven.

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Abstract

The invention relates to a method for preparing a glass solder for ceramic-stainless steel sealing, which is characterized in that the method comprises the steps: (1) crushing ordinary window glass; (2) performing wet milling according to the weight ratio that ordinary window glass: grinding balls: water is equal to 1: 2: 1 to form glass powder with an average grain diameter of between 3 and 5mu m in a planetary ball mill; and (3) performing drying in an electrothermal constant-temperature blowing dry box at a temperature of 120 DEG C. The glass solder can be melted at a temperature below 900 DEG C to guarantee the precise dimension of a stainless steel part and to reduce the energy consumption of the sealing as much as possible; on the other hand, the glass solder has wettability to a ceramic piece and the stainless steel part, thus the melt of the glass solder is easier to flow into gaps of various components, forms a compact glass layer at an appropriate cooling rate, and firmly seals two materials with different properties, namely ceramic and metal together.

Description

technical field [0001] The invention relates to the technical field of ceramic-metal sealing, in particular to a preparation method of glass solder for ceramic-stainless steel sealing. Background technique [0002] Ceramic-metal sealing technology requires ceramic-metal sealing components to have high bonding strength, good air tightness and excellent thermal cycle performance. Its stability has a great influence on the quality of the device and the whole machine. With the development of microwave tubes to millimeter-wave high power, higher requirements are put forward for the sealing performance of ceramics and metals; especially the sealing of emerging vacuum switch tubes and power electronic devices is more stringent than other vacuum devices. [0003] It is very difficult to firmly seal ceramics and metals, two materials with different properties. In order to realize the welding of ceramics and metals, it is necessary to firmly adhere a layer of metal film on the surfac...

Claims

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Application Information

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IPC IPC(8): C04B37/02
Inventor 曾松
Owner 曾松
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