Glass for tailless sealing of stainless steel vacuum insulation container and preparation method for glass

A vacuum insulation and stainless steel technology, applied in the chemical industry, can solve the problems of poor fluidity of crystalline glass, slow elimination of bubbles, and inability to eliminate bubbles, so as to improve the lack of acid resistance and welding strength of glass, improve surface tension, and eliminate bubbles Effect

Inactive Publication Date: 2015-04-29
贵州省轻工业科学研究所
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this type of glass has good fluidity, it is slow to eliminate bubbles when sintered in vacuum, and even a few remaining bubbles cannot be eliminated. When the uneliminated bubbles burst, the vacuum degree will drop
On the other hand, poor acid resistance is also one of the main problems of this type of glass. Due to the poor acid resistance, the glass tends to fall off when stainless steel products are processed in the subsequent electrolytic process.
There are also researchers trying to overcome the problem of glass shedding by using the high strength of crystalline glass. Due to the poor fluidity of crystalline glass, this problem cannot be overcome.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] A method for preparing a glass for tailless sealing of a stainless steel vacuum insulation container, comprising:

[0016] PbO 4050g, B 2 o 3 500g, ZnO 250g, SiO 2 100g, Al 2 o 3 100g.

[0017] The raw materials are mixed in a mixer, and then melted in a platinum pot. The melting temperature is 1100 ° C. Rolled into thin sheets with a double-roll mill, ball-milled with a corundum pot, passed through a 200-mesh sieve, and then added with 0.1% to 1.0% organic granulation It is granulated with polyethylene oxide, shaped by a press, and sintered into a glass blank in a box-type high-temperature resistance furnace.

[0018] When in use, put it into the sealing place of the stainless steel container and weld it. The transition point of this sample is 315°C, the softening temperature is 380°C, and the expansion coefficient is 115×10-7 / °C.

Embodiment 2

[0020] A method for preparing a glass for tailless sealing of a stainless steel vacuum insulation container, comprising:

[0021] PbO 4175g, B 2 o 3 600g, ZnO 50g, SiO 2 110g, Al 2 o 3 90g.

[0022] All the other are identical with embodiment 1.

[0023] When in use, put it into the sealing place of the stainless steel container and weld it. The transition point of this sample is 310°C, the softening point is 375°C, and the expansion coefficient is 120×10 -7 / °C.

Embodiment 3

[0025] A method for preparing a glass for tailless sealing of a stainless steel vacuum insulation container, comprising:

[0026] PbO 3750g, B 2 o 3 250g, ZnO 0g, SiO 2 50g,Al 2 o 3 250g.

[0027] All the other are identical with embodiment 1.

[0028] When in use, put it into the sealing place of the stainless steel container and weld it. The transition point of this sample is 315°C, the softening point is 382°C, and the expansion coefficient is 110×10 -7 / °C.

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Abstract

The invention discloses glass for tailless sealing of a stainless steel vacuum insulation container and a preparation method for the glass. The preparation method comprises the following steps: mixing raw materials including 75-85% of PbO, 5-15% of B2O3, 0-5% of ZnO, 1-5% of SiO2, 0.5-5% of Al2O3 and 0-5% of CuO in a mixer; melting in a platinum pot at 1,100 DEG C, rolling into sheets by a rolling machine, performing ball-milling by a corundum pot, and screening by a 200-mesh sieve; adding 0.1-1.0% of an organic granulating agent-polyoxyethylene for granulating, forming by a pressing machine, and sintering in a box-type high-temperature resistance furnace to form a glass blank. The glass is free of air bubbles, unlikely to fall off and good in acid resistance during sealing.

Description

technical field [0001] The invention belongs to the technical field of chemical industry, and in particular relates to a glass for tailless sealing of a stainless steel vacuum heat preservation container, and also relates to a preparation method of the glass for tailless sealing of a stainless steel vacuum heat preservation container. Background technique [0002] The sealing of the stainless steel vacuum insulation container is generally carried out in a vacuum furnace. First, the vacuum furnace is pumped to the required vacuum state, and the sealing is carried out after heating up to the melting temperature of the glass composition. Ordinary solder glass tends to generate air bubbles during sealing, is easy to fall off, and has poor acid resistance. The device sealed by the glass composition of the present invention has few air bubbles, is not suitable for falling off, and has good acid resistance. [0003] At present, the stainless steel tailless solder used in the mar...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C3/074
Inventor 张国春韩文刘启华姚绍清
Owner 贵州省轻工业科学研究所
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