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Titanium and Kovar alloy sealing glass material for thermal battery, preparation method and application

A technology for sealing glass and thermal batteries, applied in glass manufacturing equipment, glass furnace equipment, manufacturing tools, etc., can solve problems such as micro-cracks in the sealing interface, difficulty in cleaning, complex oxide layer structure, etc.

Active Publication Date: 2022-03-01
XIAN SEAL ELECTRONICS MATERIAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, there are still many problems in the special sealing of titanium and its alloys all over the world. For example, the wettability between titanium and its alloys and traditional sealing glass is poor, and the sealing temperature exceeds the phase transition point of titanium and its alloys, resulting in the size of the product after sintering. Excess tolerance, high sintering temperature lead to complex structure of oxide layer, difficult to clean, etc.
Therefore, it is difficult to obtain sealing products in good condition by using traditional sealing glass. At present, glass frits such as DM305, DM308 or Elan19 are mostly used at home and abroad, and sintered through some very tedious and complicated packaging processes. The yield and consistency of these products It is very poor, and there are relatively serious defects at the sealing interface of titanium and its alloys. When disturbed by changes in the external environment, a large number of microcracks will be generated at the defects of the sealing interface, resulting in poor air tightness and low insulation resistance. At the same time, titanium and titanium alloys are easily oxidized at high temperatures, and different types of oxide layers are formed at different temperatures, which increases the difficulty of subsequent surface treatment

Method used

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  • Titanium and Kovar alloy sealing glass material for thermal battery, preparation method and application
  • Titanium and Kovar alloy sealing glass material for thermal battery, preparation method and application
  • Titanium and Kovar alloy sealing glass material for thermal battery, preparation method and application

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] A preparation method of titanium and titanium alloy and Kovar alloy sealing glass material for thermal battery, specifically comprising the following steps:

[0059] 1), select chemical composition batching by following weight percentage:

[0060] SiO 2 15%, B 2 o 3 35%, Bi 2 o 3 5%, Al 2 o 3 17.5%, Na 2 O is 2.4%, K 2 O is 2.5%, MgO is 2.5%, CaO is 5%, SrO is 5%, ZnO is 10%, TiO 2 0.05% for CoO and 0.05% for CoO;

[0061] 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;

[0062] 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 700°C at a heating 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 1350°C and keep it ...

Embodiment 2

[0082] A preparation method of titanium and titanium alloy and Kovar alloy sealing glass material for thermal battery, specifically comprising the following steps:

[0083] 1), select chemical composition batching by following weight percentage:

[0084] SiO 2 20%, B 2 o 3 25%, Bi 2 o 3 10%, Al 2 o 3 10%, Na 2 O is 2%, K 2 O is 5%, MgO is 2.5%, CaO is 10%, SrO is 10%, ZnO is 5%, TiO 2 0.4% and CoO 0.1%.

[0085] 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;

[0086] 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 lift furnace, and raise the temperature to 775°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 2 hours, stirring se...

Embodiment 3

[0102] A method for preparing a special sealing glass for primary lithium thionyl chloride battery terminals, specifically comprising the following steps:

[0103] 1), select chemical composition batching by following weight percentage:

[0104] SiO 2 18.5%, B 2 o 3 50%, Al 2 o 3 7%, Na 2 O is 5%, K 2 O is 2.5%, MgO is 3%, CaO is 6%, SrO is 2.5%, BaO is 0.36%, ZnO is 5%, TiO 2 0.1% and CoO 0.04%.

[0105] 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;

[0106] 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 800°C at a heating rate of 10°C / min in an air atmosphere and keep it warm for 60min. Then increase the temperature at a rate of 10°C / min to 1500°C and keep it warm for 2 hours. During th...

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Abstract

The invention discloses a titanium and titanium alloy and Kovar alloy sealing glass material for thermal batteries and a preparation method thereof. Silicon dioxide and diboron trioxide are used as the skeleton structure, and a relatively large proportion of diboron trioxide is added to Improve the wettability and interface stability of glass and titanium and its alloys, and achieve a stable glass system by controlling the ratio of silicon dioxide and boron trioxide. After annealing and other heat treatment steps, problems such as phase separation and crystallization are not easy to occur; A small amount of alkali metal elements can reduce the melting temperature, increase the expansion coefficient, and have a small impact on the chemical stability of the glass; add alkaline earth metal oxides such as MgO, CaO, SrO, and BaO, and its cation Mg 2+ , Ca 2+ 、Sr 2+ 、Ba 2+ Fill in the network gap and produce mixed alkali effect and suppression effect, which hinders the activity of alkali metal ions and improves the insulating performance of glass; adding Al 2 o 3 AlPO can be formed in the glass 4 The unit changes from a straight chain to a network structure, which stabilizes the structure of the glass and improves its chemical stability.

Description

technical field [0001] The invention belongs to the technical field of glass-metal sealing, and relates to a titanium and Kovar alloy sealing glass material for a thermal battery, a preparation method and an application. Background technique [0002] Thermal batteries, also called molten salt batteries, have the characteristics of long storage time, short activation time, high current density, and high specific energy. They are mainly used for the detonation power of shells and the working power of missiles and other weapons and equipment. In order to meet the characteristics of high reliability and high temperature resistance, the cover group adopts a glass sealing structure. In the thermal battery cover group, the glass is sealed to connect the metal stem and the metal shell to play the role of sealing and insulation. , is a key component of the thermal battery, and its quality directly affects the overall performance of the thermal battery. [0003] In recent years, with...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C03C8/24C03C6/04C03B5/16H01M6/36
CPCC03C8/24C03C1/00C03B5/16H01M6/36
Inventor 华斯嘉郝小军冯庆贾波杨文波刘卫红
Owner XIAN SEAL ELECTRONICS MATERIAL TECH CO LTD
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