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Low-temperature sealing glass and preparation method thereof

A glass and low-temperature technology, applied in the field of materials, can solve the problems of low operating temperature and high sintering temperature, and achieve the effect of maintaining toughness and good sealing performance

Active Publication Date: 2014-04-23
SUZHOU CHANGFENG AVIATION ELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the shortcomings of traditional sealing materials such as too high sintering temperature and too low service temperature, the invention provides a low-temperature sealing glass and its preparation method

Method used

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  • Low-temperature sealing glass and preparation method thereof
  • Low-temperature sealing glass and preparation method thereof
  • Low-temperature sealing glass and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Embodiment 1: a kind of low-temperature sealing glass, material comprises bismuth subnitrate, boric acid, barium carbonate, silicon dioxide, aluminum hydroxide and copper oxide, and surplus is unavoidable impurity, and its composition is by weight percentage:

[0022]

[0023]

[0024] The preparation method of above-mentioned low-temperature sealing glass is:

[0025] Step 1: Weigh bismuth nitrate, boric acid, barium carbonate, silicon dioxide, aluminum hydroxide and copper oxide according to the weight percentage and fully mix them uniformly;

[0026] Step 2: Put the mixed raw materials into the crucible, put it in a high-temperature resistance furnace at 1100°C for sintering for 20 minutes, then take out the crucible and cool it for 2 minutes, and quickly put the molten glass body into room temperature water;

[0027] Step 3: After taking it out, put it in a high-temperature box and dry it at 150°C for 1 hour;

[0028] Step 4: Put the vitreous body into a ball...

Embodiment 2

[0033] Embodiment 2: a kind of low-temperature sealing glass, material comprises bismuth subnitrate, boric acid, barium carbonate, silicon dioxide, aluminum hydroxide and copper oxide, and surplus is unavoidable impurity, and its composition is by weight percentage:

[0034]

[0035]

[0036] The preparation method of above-mentioned low-temperature sealing glass is:

[0037] Step 1: Weigh bismuth nitrate, boric acid, barium carbonate, silicon dioxide, aluminum hydroxide and copper oxide according to the weight percentage and fully mix them uniformly;

[0038] Step 2: Put the mixed raw materials into the crucible. The crucible is a bisque crucible, put it in a high-temperature resistance furnace at 1150°C for sintering for 15 minutes, then take out the crucible and cool it for 1 minute, and quickly put the molten glass body into room temperature water;

[0039] Step 3: After taking it out, put it in a high-temperature box and dry it at 150°C for 1 hour;

[0040] Step 4:...

Embodiment 3

[0045] Embodiment 3: a kind of low-temperature sealing glass, material comprises bismuth subnitrate, boric acid, barium carbonate, silicon dioxide, aluminum hydroxide and copper oxide, and surplus is unavoidable impurity, and its composition is by weight percentage:

[0046]

[0047] The preparation method of above-mentioned low-temperature sealing glass is:

[0048] Step 1: Weigh bismuth nitrate, boric acid, barium carbonate, silicon dioxide, aluminum hydroxide and copper oxide according to the weight percentage and fully mix them uniformly;

[0049] Step 2: Put the mixed raw materials into a bisque crucible, put it in a high-temperature resistance furnace at 1120°C for sintering for 18 minutes, then take out the crucible to cool for 1.5 minutes, and quickly put the molten glass body into room temperature water;

[0050] Step 3: After taking it out, put it in a high-temperature box and dry it at 150°C for 1 hour;

[0051] Step 4: Put the vitreous body into a ball mill cyl...

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Abstract

The invention relates to low-temperature sealing glass and a preparation method thereof. The low-temperature sealing glass comprises the compositions in percent by weight: 63.3%-66.9% of bismuth subnitrate, 13.1%-14.5% of boric acid, 14.3%-15.7% of barium carbonate, 2.8%-3.1% of silica, 1.0%-1.3% of aluminium hydroxide and 1.9%-2.1% of copper oxide; and the balance is unavoidable impurities. Undamaged sintering effect can be reached at low temperature when the low-temperature sealing glass is prepared according to requirements; the low-temperature sealing glass has good sealing performance; and when sintering is performed at the temperature, because the temperature is low and crystal grains of the material grow slowly, the material crystal grains does not show obvious growth and the material keeps original toughness when sintering is finished and the material crystal grains are subjected to microstructure analysis, so that intergranular fracture of a hot electrode at high temperature cannot be caused.

Description

technical field [0001] The invention belongs to the field of materials, and relates to a low-temperature sealing glass and a preparation method thereof. Background technique [0002] Because the thermal electrode of the assembled thermocouple is isolated from the nozzle after assembly, in order to ensure the fixation between the thermal electrode and the nozzle, it is necessary to fill and fix the sealing glass. The 90# glass powder used in traditional sintering has a sintering temperature of 1150 ° C ~ At 1250°C, due to the high sintering temperature, the grains of the thermal electrode material tend to grow during the sintering process. With the growth of the electrode grains, the toughness of the material decreases, and the material is prone to brittle fracture. Therefore, it is necessary to seek a low-temperature sintering material, and the domestic market has not yet found a fixed material that meets the requirements, so it needs to be developed by itself. Contents of...

Claims

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Application Information

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IPC IPC(8): C03C8/24
Inventor 郭勇仲进
Owner SUZHOU CHANGFENG AVIATION ELECTRONICS
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