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Barium crown sealed glass and preparation and application thereof

A technology for sealing glass and glass, which is applied to lead-free sealing glass and its preparation and application fields, can solve the problems of poor chemical stability and electrical performance, cannot adapt to lead-free, and has no cost advantage, and achieves convenient operation. , the effect of low cost and excellent chemical stability

Inactive Publication Date: 2008-01-30
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The softening temperature of the glass is 400-430°C, and the coefficient of thermal expansion is 145-170×10 -7 / °C, although the softening temperature of the glass is suitable for low-melt sealing, but the content of alkali metal oxides is high, resulting in poor chemical stability and electrical properties. In addition, the glass has a large thermal expansion coefficient and cannot be used for medium and The seal with low expansion coefficient contains a small amount of lead at the same time, so it cannot meet the requirements of lead-free
In addition, due to the noble metal ZrO 2 The content is relatively high, so there is also no advantage in terms of cost

Method used

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  • Barium crown sealed glass and preparation and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] According to the weight percentage of the composition in Table 1, the ingredients are mixed evenly, the glass frit is put into a quartz crucible, and heated and melted in a silicon carbide rod electric furnace at a melting temperature of 1270°C and kept for 11 minutes.

[0031] The annealed sample is ground into a cylindrical sample of φ5×25mm for performance analysis: the coefficient of thermal expansion (α) is measured by a WRP-1 microcomputer thermal dilatometer, and the temperature rises from room temperature to 300°C with a heating rate of 5°C / min; The sealing temperature is obtained through a hemispherical experiment, and the test results are shown in Table 1.

[0032] The melted glass is poured into a tablet press to be pressed into tablets, and then it is ball-milled into powdered glass powder, and the sieved glass powder is packaged for use by users.

Embodiment 2

[0034] According to the weight percentage of the composition in Table 1 and mix evenly, put the glass frit into a quartz crucible, heat and melt in a silicon carbide rod electric furnace, the melting temperature is 1250°C, and keep warm...

[0035] The annealed sample was ground into a cylindrical sample with a size of φ5×25mm for performance analysis. The test results are shown in Table 1.

[0036] The melted glass is poured into a tablet press to be pressed into tablets, and then it is ball-milled into powdered glass powder, and the sieved glass powder is packaged for use by users.

Embodiment 3

[0038] According to the weight percentage of the composition in Table 1, the ingredients are mixed evenly, the glass frit is put into a quartz crucible, and heated and melted in a silicon carbide rod electric furnace at a melting temperature of 1230°C.

[0039] The annealed sample was ground into a cylindrical sample with a size of φ5×25mm for performance analysis. The test results are shown in Table 1.

[0040] The melted glass is poured into a tablet press to be pressed into tablets, and then it is ball-milled into powdered glass powder, and the sieved glass powder is packaged for use by users.

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Abstract

The invention relates to lead-free sealing glass and a preparation method thereof. The glass contains Bi2O3 of 40-70 percent, B2O3 of 0-30 percent, ZnO of 0-30 percent, Al2O3 of 0-10 percent, SiO2 of 0-10 percent, MgO of 0-15 percent, TiO2 of 0-5 percent, CaO of 0-5 percent, and CuO of 0-5 percent. The preparation method needs the following steps: (1) the materials are weighted according to proportion and mixing the materials completely to make mixture material; (2) the mixture material is melted under 1000-1350 DEG C for 10 minutes to 1 hour; (3) the glass molten preparing is cooled and solidified for making glass body. The sealing glass contains no lead, and has good sealing performance, good sealing fluidity, chemical stability and low expansion coefficient. Meanwhile, the preparation technique is simple, the operation is convenient, the cost is low, and is suitable to be used as sealing glass of glass, ceramic, metal, semi conductive material, and more particularly suitable for the sealing of Al2O3 ceramic base plate (60-70 multiply10-7 / DEG C), and has good competition in lead-free field and good market development prospect.

Description

technical field [0001] The invention belongs to sealing glass and a preparation method thereof, in particular to a lead-free sealing glass and its preparation and application. Background technique [0002] Sealing glass is an advanced welding material with suitable melting temperature and sealing temperature, good heat resistance and chemical stability, high mechanical strength, and is widely used in electric vacuum and microelectronics technology, laser and Infrared technology, high energy physics, energy, aerospace, automobile and many other fields. The mutual sealing between glass, ceramics, metal and semiconductor is realized. Applied products include cathode ray tube displays, vacuum fluorescent displays, plasma displays, vacuum glass, solar collector tubes, lasers, magnetic material heads and magnetic material films, etc. [0003] With the increasing awareness of human environmental protection, lead has been listed by the environmental protection agency as one of the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C8/24C03C27/02C04B37/04
Inventor 李胜春陈培
Owner DONGHUA UNIV
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