Lead-free sealing glass with transitional expansion coefficient

A technology of expansion coefficient and glass, which is applied in the field of transition expansion coefficient lead-free sealing glass, can solve the problems of complex sealing process, difficult control of product quality, and increased difficulty, and achieve simple sealing process, low cost and easy product quality The effect of control

Inactive Publication Date: 2013-10-02
QILU UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the sealing process of this method is complicated, and the product quality is difficult to control.
Especially when the cross-section of the device to be sealed is a ring structure, the difficulty of adopting the transitional sealing method is further increased

Method used

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  • Lead-free sealing glass with transitional expansion coefficient
  • Lead-free sealing glass with transitional expansion coefficient

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The parts by weight of raw materials used are: 52.18 parts of quartz sand, 3.85 parts of aluminum hydroxide, 14.05 parts of bismuth trioxide, 2.17 parts of ferric oxide, 3.85 parts of magnesium oxide, 14.53 parts of sodium carbonate, 4.66 parts of sodium nitrate, potassium carbonate 19.47 parts, 5.54 parts of potassium nitrate.

[0023] The specific steps of the manufacturing method are as follows:

[0024] Step 1: Accurately weigh and mix the above-mentioned raw materials evenly, and heat them in a silicon-molybdenum rod electric furnace at 1753K for 2 hours to prepare a uniform molten glass. The homogeneous molten glass was quickly cast in a preheated stainless steel mold and annealed at 720 K for 1 hour to obtain a transparent, uniform and bubble-free bulk base glass.

[0025] Step 2: Obtain the glass transition temperature T of each sample according to the DSC test results of the base glass g , Put the basic glass into a closed crucible filled with carbon powder, ...

Embodiment 2

[0027] The raw materials used are composed of 51.41 parts by weight of quartz sand, 3.79 parts of aluminum hydroxide, 13.84 parts of bismuth trioxide, 2.14 parts of ferric oxide, 9.46 parts of calcium carbonate, 14.31 parts of sodium carbonate, 4.59 parts of sodium nitrate, potassium carbonate 19.18 parts, 5.46 parts of potassium nitrate.

[0028] The specific steps of the manufacturing method are as follows:

[0029] Step 1: Use quartz sand, aluminum oxide, aluminum hydroxide, bismuth trioxide, ferric oxide, calcium carbonate, soda ash, sodium nitrate, potassium carbonate, etc. as raw materials, and accurately weigh and mix them according to the above chemical composition. The silicon-molybdenum rod electric furnace was kept at 1753K for 2 hours to obtain a uniform molten glass. The homogeneous molten glass is quickly cast in a preheated stainless steel mold, and annealed at 730K for 1 hour to obtain a transparent, uniform and bubble-free bulk basic glass.

[0030] Step 2: ...

Embodiment 3

[0032] The parts by weight of raw materials used are: 49.22 parts of quartz sand, 3.63 parts of aluminum hydroxide, 13.25 parts of bismuth trioxide, 2.05 parts of ferric oxide, 13.36 parts of strontium carbonate, 13.7 parts of sodium carbonate, 4.39 parts of sodium nitrate, potassium carbonate 18.37 parts, 5.23 parts of potassium nitrate.

[0033] The specific steps of the manufacturing method are as follows:

[0034] Step 1: Use quartz sand, aluminum oxide, aluminum hydroxide, bismuth trioxide, ferric oxide, strontium carbonate, soda ash, sodium nitrate, potassium carbonate, etc. as raw materials, accurately weigh and mix them according to the above chemical composition, and The silicon-molybdenum rod electric furnace was kept at 1743K for 2 hours to obtain a uniform molten glass. The homogeneous molten glass is quickly cast in a preheated stainless steel mold, and annealed at 710K for 1 hour to obtain a transparent, uniform and bubble-free bulk basic glass.

[0035] Step 2...

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Abstract

The invention belongs to the field of new glass materials, and particularly discloses lead-free sealing glass with a transitional expansion coefficient. The lead-free sealing glass with the transitional expansion coefficient is prepared by mixing the effective materials of SiO2, Al2O3, Bi2O3, Fe2O3, Na2O, K2O, MgO, CaO, SrO, BaO and ZnO according to a certain weight fraction. The lead-free sealing glass with the transitional expansion coefficient overcomes the defects of the conventional transitional sealing manner, has the advantages that the sealing process is simple, the cost is low and the product quality is easy to control, and is particularly suitable for the situation that the cross section of the device to be sealed is annular.

Description

(1) Technical field [0001] The invention relates to the field of new glass materials, in particular to a transition expansion coefficient lead-free sealing glass. (2) Background technology [0002] Sealing glass is a kind of special glass that connects and seals different materials. The sealed substrate materials include metal, ceramics and glass. It is widely used in electric vacuum and microelectronics technology, laser and infrared technology, high energy physics, energy, Aerospace, automotive and many other fields. With the miniaturization of instrument components and the continuous improvement of the precision level of structural components, there are more and more types of electronic components, and the appearance of products is becoming more and more complicated, which requires more and more quality requirements for sealing glass. high. Lead glass has the characteristics of large glass forming range, high refractive index and long material properties, and has be...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C8/24C03C3/091
Inventor 刘树江
Owner QILU UNIV OF TECH
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