Crystallizing glass material for 4J29 kovar alloy sealing-in and method of producing the same

A technology of glass-ceramics and a manufacturing method, which are applied in the field of Li2O-ZnO-Al2O3-SiO2 glass-ceramic materials and their preparation, can solve the problems of high leakage rate, restricting the development of new electronic components, unstable electrical insulation performance, and the like, To achieve the effect of simple process conditions

Inactive Publication Date: 2008-04-02
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

With the miniaturization of electronic devices and the precision of structural components, the requirements for airtightness and reliability of sealing products are getting higher and higher. The above-mentioned traditional sealing glass and metal sealing generally have a high leakage rate and are prone to moisture. , Unstable electrical insulation performance and other issues, thus restricting the development of new electronic components

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Glass composition (wt%) is:

[0018] SiO 2 Al 2 o 3 ZnO Li 2 OP 2 o 5 Sb 2 o 3

[0019] 50.85 15.34 19.93 11.88 1.6 0.4

[0020] Use silicon dioxide, aluminum oxide, zinc oxide, lithium carbonate, diammonium hydrogen phosphate, and antimony trioxide as raw materials, weigh and mix them evenly according to the above components, then keep warm in an electric furnace at 1350°C for 3 hours, and melt The molten glass is rapidly cooled in the mold to form a block-shaped basic glass, which is sent to an annealing furnace at 520°C for annealing, kept for 1 hour, and then cooled to room temperature. The heat treatment system is as follows: from room temperature to 535°C at a rate of 5°C / min, hold for 2 hours, then rapidly raise the temperature to 680°C, hold for 2 hours, and cool down to room temperature with the furnace to form a glass-ceramic material. Its coefficient of thermal expansion is 51.7×10 -7 ℃ -1 , the flexural strength is 124.54MPa, and the ...

Embodiment 2

[0022] Glass composition (wt%) is:

[0023] SiO 2 Al 2 o 3 ZnO Li 2 OP 2 o 5 Sb 2 o 3

[0024] 50.85 15.34 19.93 11.88 1.6 0.4

[0025] Use silicon dioxide, aluminum oxide, zinc oxide, lithium carbonate, diammonium hydrogen phosphate, and antimony trioxide as raw materials, weigh and mix them evenly according to the above components, then keep warm in an electric furnace at 1350°C for 3 hours, and melt The molten glass is rapidly cooled in the mold to form a block-shaped basic glass, which is sent to an annealing furnace at 520°C for annealing, kept for 1 hour and then cooled to room temperature. The heat treatment system is as follows: from room temperature to 535°C at a rate of 5°C / min, hold for 2 hours, then rapidly raise the temperature to 700°C, hold for 2 hours, and cool down to room temperature with the furnace to form a glass-ceramic material. Its coefficient of thermal expansion is 49.5×10 -7 ℃ -1 , the flexural strength is 130.47MPa, and the d...

Embodiment 3

[0027] Glass composition (wt%) is:

[0028] SiO 2 Al 2 o 3 ZnO Li 2 OP 2 o 5 Sb 2 o 3

[0029] 50.85 15.34 19.93 11.88 1.6 0.4

[0030]Use silicon dioxide, aluminum oxide, zinc oxide, lithium carbonate, diammonium hydrogen phosphate, and antimony trioxide as raw materials, weigh and mix them evenly according to the above components, then keep warm in an electric furnace at 1350°C for 3 hours, and melt The molten glass is rapidly cooled in the mold to form a block-shaped basic glass, which is sent to an annealing furnace at 520°C for annealing, kept for 1 hour, and then cooled to room temperature. The heat treatment system is as follows: from room temperature to 535°C at a rate of 5°C / min, hold for 2 hours, then rapidly raise the temperature to 720°C, hold for 2 hours, and cool down to room temperature with the furnace to form a glass-ceramic material. Its coefficient of thermal expansion is 47.9×10 -7 ℃ -1 , the flexural strength is 141.75MPa, and the d...

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Abstract

The composition of a microlite glass material for sealing with 4J29 kovar alloy is Li2O-ZnO-Al2O3-SiO2; a crystal nucleating agent is P2O5; a clarifying agent is Sb2O3; raw materials are mixed according to a ratio to prepare a uniform batch; the batch is put into a corundum crucible and melted at a temperature between 1350 and 1400 DEG C in a high-temperature electric cooker for three hours; then the batch is injected and molded. At a constant temperature of about 520 DEG C, anneal is done for 1 hour; in the end, the batch is processed to be microcrystal. The present invention uses the complementary principle of thermal performances; with the composition design and crystallization process of base glass, the Li2Al2Si3O10 main crystal phase of low heat expansion coefficient or negative thermal expansion coefficient can be separated in the base glass. The present invention uses a little P2O5 as the crystal nucleating agent; the betaII'-LZS is first separated when the base glass is micro-crystallized; then a plurality of Li2Al2Si3O10 crystal phase are separated to get the microlite glass; a large amount of tiny dendrite are mutually connected to form a network; thus the microlite glass has a higher mechanical strength.

Description

technical field [0001] The present invention relates to a method using P 2 o 5 Li as nucleating agent 2 O-ZnO-Al 2 o 3 -SiO 2 A glass-ceramic material and a preparation method thereof belong to the field of new electronic glass materials. This kind of glass-ceramic is mainly used as a seal with 4J29 Kovar alloy, and plays an insulating support and protection role for electronic products. Background technique [0002] Since the electrical characteristics of electronic components are extremely sensitive to the surrounding environmental conditions, once damp or corroded, it will lead to deterioration of insulation resistance, leakage current, breakdown voltage and other performance, which will affect the normal operation of electronic instruments and equipment, and even malfunction, causing Equipment malfunctions. Especially for electronic products used in high temperature and high humidity environment conditions, this effect is particularly obvious. [0003] Kovar allo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C8/24
Inventor 卢安贤柯尊斌刘树江张小富肖卓豪李秀英王宇卢子祺
Owner CENT SOUTH UNIV
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