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Sealing glass material and preparation method thereof

A technology for sealing glass and glass liquid is applied in the field of sealing glass materials and their preparation, which can solve the problems of insufficient bonding strength, mismatched expansion coefficients, poor chemical stability, etc., and achieve improved chemical stability. , to ensure that the expansion coefficient is matched, and the effect of improving chemical stability and electrical insulation

Active Publication Date: 2019-01-22
XIAN SEAL ELECTRONICS MATERIAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Another major problem is that if the expansion coefficient of the sealing glass itself does not match, the mechanical strength and chemical stability are not good, or the wettability with the metal and the bonding strength of the interface do not meet the requirements, then the sealed terminal It is easily affected by mechanical stress during battery assembly and production, subsequent storage, temperature shock during use, and strong corrosion of lithium metal and electrolyte in the battery, resulting in glass corrosion and cracking, resulting in battery leakage, short circuit, and in severe cases. Corrosion of surrounding equipment, resulting in very serious safety hazards

Method used

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  • Sealing glass material and preparation method thereof
  • Sealing glass material and preparation method thereof
  • Sealing glass material and preparation method thereof

Examples

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preparation example Construction

[0028] A method for preparing a sealing glass material, comprising the steps of:

[0029] 1), select chemical composition batching by following weight percentage:

[0030] SiO 2 :30%-50%, B 2 o 3 :30%-50%, Al 2 o 3 :3%-15%, Na 2 O: 3%-5%, K 2 O: 3%-5%, MgO: 0.01%-5%, CaO: 3%-10%, SrO: 0.01%-5%, BaO: 0.01%-5%, ZnO: 5%-10%, TiO 2 :0.01%-1%;

[0031] 2), the above-mentioned ingredients are placed in a planetary ball mill for ball milling, so that the ingredients are mixed evenly;

[0032] 3) Then put the ball-milled and mixed materials in the crucible, place the crucible in a high-temperature lifting furnace, heat it with the furnace until it is completely melted and clarified to obtain molten glass, pour the molten glass into cold distilled water, and quench it to obtain glass debris;

[0033] 4) Place the obtained glass cullet in an oven, bake at 75-100° C. for 12-24 hours, then grind the baked glass cullet, and pass through an 80-mesh sieve to obtain a sealing glass ...

Embodiment 1

[0046] A preparation method of sealing glass for primary lithium thionyl chloride battery terminals, specifically comprising the following steps:

[0047] 1), select chemical composition batching by following weight percentage:

[0048] Na 2 O is 3%, K 2 O is 3%, MgO is 0.95%, CaO is 5%, SrO is 5%, BaO is 3%, ZnO is 5%, TiO 2 0.05%, Al 2 o 3 5%, SiO 2 30%, B 2 o 3 40%.

[0049] 2) Put the raw materials of the above-mentioned components in a ball mill for ball milling, so that the ingredients are mixed evenly, the grinding speed is 300r / min, and the time is 30min;

[0050] 3) Put the ball-milled and mixed materials in step (2) in a corundum crucible or a platinum crucible, place the crucible in a high-temperature lifting furnace, and raise the temperature to 650°C at a rate of 10°C / min in an air atmosphere and keep it warm for 40min. Then increase the temperature at a rate of 10°C / min to 1500°C and keep it warm for 1.5 hours. During this period, stir several times to m...

Embodiment 2

[0070] A method for preparing a special sealing glass for primary lithium thionyl chloride battery terminals, specifically comprising the following steps:

[0071] 1), select chemical composition batching by following weight percentage:

[0072] Na 2 O is 4%, K 2 O is 4%, MgO is 2.5%, CaO is 5%, SrO is 5%, BaO is 5%, ZnO is 7%, TiO 2 0.5%, Al 2 o 3 7%, SiO 2 30%, B 2 o 3 30%;

[0073] 2) Put the raw materials of the above-mentioned components in a ball mill for ball milling, so that the ingredients are mixed evenly, the grinding speed is 300r / min, and the time is 30min;

[0074] 3) Put the ball-milled and mixed materials in step (2) in a corundum crucible or a platinum crucible, place the crucible in a high-temperature lifting furnace, and raise the temperature to 750°C at a rate of 10°C / min in an air atmosphere and keep it warm for 40min. Then increase the temperature at a rate of 10°C / min to 1400°C and keep it warm for 1.0 hour. During this period, stir several time...

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Abstract

The invention discloses a sealing glass material and a preparation method thereof; silicon dioxide and boron trioxide are used as a skeleton structure and a network forming body for glass, wetting property and interface stability of the glass and titanium and a titanium alloy can be increased by adding of the boron trioxide, phase separation and crystallization problems are not easy to cause afterannealing and other heat treatment steps; alkali metal elements are used to lower melting temperature and increase expansion coefficient, and positive ions Mg<2+>, Ca<2+>, Sr<2+>, and Ba<2+> are filled into network spaces to produce mixed alkali effect and pressing effect to hinder the activity of alkali metal ions and improve the insulation performance of the glass; Al2O3 is added to form AlPO4units in the glass, and a linear structure is changed into a network structure, so that the structure of the glass tends to be stable, and the chemical stability is improved; ZnO and TiO2 oxides are added to improve the chemical stability and electrical insulation of the glass. The expansion coefficients of the sealing glass are matched, and the mechanical strength and chemical stability of the sealing glass are enhanced.

Description

technical field [0001] The invention belongs to the technical field of glass-metal sealing, and relates to a sealing glass material and a preparation method thereof. Background technique [0002] Primary lithium thionyl chloride batteries have many advantages such as high specific energy, high open circuit voltage, low self-discharge rate, wide operating temperature range, and stable operating voltage. The sealing glass in the battery terminal seals the positive metal stem and the negative metal shell, which plays the role of sealing and insulation. It is a key component of the battery, and its quality directly affects the overall performance of the battery. [0003] There are currently two major problems with primary lithium thionyl chloride battery terminals. One problem is that metal molybdenum is often used as the material of this kind of battery core column. Molybdenum has disadvantages such as not easy to process, easy to fall off the oxide layer, poor wettability wit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C8/24
CPCC03C8/24
Inventor 华斯嘉郝小军冯庆贾波焦明张乐王哲
Owner XIAN SEAL ELECTRONICS MATERIAL TECH CO LTD
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