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Corrosion-resistant sealing glass material for primary lithium battery and preparation method thereof

A technology for sealing glass and lithium batteries, which is applied in the field of corrosion-resistant sealing glass materials for primary lithium batteries and its preparation, and can solve problems such as poor glass wetting performance and air tightness, poor water resistance of glass, battery leakage failure, etc. problems, to achieve the effect of improving fluidity and chemical stability, good sealing, and improving wetting ability

Inactive Publication Date: 2011-05-25
西安华泰有色金属实业有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But the disadvantage is that the pole is not easy to weld, not easy to process, and brittle; the sealing glass material is easily corroded by the electrolyte and metal lithium when the primary lithium battery is stored for a long time, resulting in battery leakage and failure
The disadvantage is that the glass has poor water resistance, poor wetting performance and air tightness with the glass, and the leakage rate can only reach 1.0×10 -9 Pa.m 3 / s.He causes a leak

Method used

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  • Corrosion-resistant sealing glass material for primary lithium battery and preparation method thereof

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preparation example Construction

[0023] The corrosion-resistant sealing glass material for primary lithium batteries proposed by the present invention, in mole percent, contains the following components: SiO 2 : 40~60%; B 2 o 3 : 10~30%; BaO: 5~10%; K 2 O: 5-10%; Na 2 O: 5-10%; Al 2 o 3 : 5-10%; CaO: 0-5%; SrO: 0-5%. The preparation method of this kind of corrosion-resistant sealing glass material comprises the following four steps:

[0024] 1) According to the molar ratio of each component, the ingredients are prepared by introducing oxide raw materials;

[0025] Among them, quartz sand is introduced into silica, analytically pure boric acid is introduced into diboron trioxide, analytically pure barium carbonate is introduced into barium oxide, analytically pure sodium carbonate is introduced into sodium oxide, analytically pure potassium carbonate is introduced into potassium oxide, aluminum hydroxide is introduced into aluminum oxide , Calcium carbonate is introduced into calcium oxide, and analytic...

Embodiment 1

[0034] Dosing is carried out according to the molar percentage composition in Table 1, and the batching is carried out by introducing oxide raw materials, specifically: introducing silicon dioxide with quartz sand, introducing diboron trioxide with analytically pure boric acid, introducing barium oxide with analytically pure barium carbonate, and introducing boron trioxide with analytically pure boric acid. Sodium carbonate is introduced into sodium oxide, analytically pure potassium carbonate is introduced into potassium oxide, aluminum hydroxide is introduced into aluminum oxide, calcium carbonate is introduced into calcium oxide, and analytically pure strontium oxide is introduced into strontium oxide. Mix the oxide raw materials of each component evenly to make a batch.

[0035] Put the pretreated glass mixture in a platinum crucible and melt it in a silicon-molybdenum furnace: heat up at a rate of 50°C / min, heat to 1450°C and keep it for 40min, and clarify at 1460°C.

[0...

Embodiment 2

[0040] Dosing according to the composition in Table 1, compared with Example 1, reducing the content of strontium oxide, and comparing the resistance of glass to electro-hydraulic corrosion.

[0041] The pretreated glass mixture was placed in a platinum crucible, heated to 1440°C for 40 minutes in a silicon-molybdenum furnace, and clarified at 1450°C.

[0042] Pour the melted glass liquid into the mold to prepare samples according to the test requirements, and pour the rest into cold water.

[0043] The samples in the mold were taken out and processed according to the test requirements and tested. The test results are shown in Table 1.

[0044] The average thermal expansion coefficient of this example at 25-300°C is 85×10 -7 / °C, good match with 4j28a, 4j52 center pole; leak rate ≤3.0×10 -10 Pa.m3 / s; weight erosion ratio 0.12.

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Abstract

The invention discloses a corrosion-resistant sealing glass material for a primary lithium battery and a preparation method thereof. The corrosion-resistant sealing glass material comprises the following components in percentage by mole: 40-60 percent of SiO2, 10-30 percent of B2O3, 5-10 percent of BaO, 5-10 percent of K2O, 5-10 percent of Na2O, 5-10 percent of Al2O3, 0-5 percent of CaO, and 0-5 percent of SrO. The sealing glass material disclosed by the invention resists the corrosion of lithium and electrolyte, has good air tightness and insulativity and is applicable to sealing of the primary lithium battery. The sealing temperature of the glass is 940 DEG C-1010 DEG C. The thermal expansion coefficient is in the range of 65-95*10-7 / DEG C, more metal pole columns can be selected, the corrosion-resistant sealing glass material can be matched and sealed with molybdenum pole columns and iron-nickel alloy wires such as 4J52 and the like with excellent welding performance, the leakage caused by internal stress explosion of the glass is prevented, and the air tightness of a sealing device is ensured.

Description

technical field [0001] The invention belongs to the technical field of battery sealing glass, and relates to a sealing glass material and a preparation method thereof, in particular to a corrosion-resistant sealing glass material for primary lithium batteries and a preparation method thereof. Background technique [0002] Sealing glass is a new type of solder. This type of glass has good heat resistance, chemical stability and high insulation. It is widely used in fields such as electric vacuum and microelectronics technology, automobiles, and new electronic products. Tight connection with metal. The primary lithium battery uses sealing glass to seal the positive pole of the primary lithium battery and the metal cover of the negative base, which plays the role of sealing and insulation. It is the key raw material of the primary lithium battery, and its quality directly affects the primary lithium battery. performance. If the corrosion resistance and chemical stability of t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C8/24
Inventor 胡水冯生冯庆任越峰杨文波任利娜赵红刚
Owner 西安华泰有色金属实业有限责任公司
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