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Glass sealing material for thermal battery and preparation method thereof

A glass sealing and thermal battery technology is applied in the field of glass sealing material for thermal battery, glass sealing material for lightweight titanium thermal battery and its preparation, which can solve the problem of poor sealing sealing, poor wettability and insulation. problems such as poor resistance, to achieve the effect of high insulation resistance, good wetting, and improved insulation resistance

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

AI Technical Summary

Problems solved by technology

[0004] At present, there is no sealing material specially used for metal titanium in China. The wettability of traditional DM308, DM305, Elan13, Elan19 and titanium sealing is not good, and the airtightness after sealing is poor, which is 1.0×10 -7 Pa.m 3 / s, in order to solve such problems, a domestic patent (ZL200820302893.5) designed a thermal battery battery cover and pole with a transition ring sealing structure to solve the current direct sealing of the titanium alloy battery cover and pole Bad, poor insulation resistance
However, the process is complicated, and the wetting problem between titanium and metal has never been fundamentally solved.

Method used

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  • Glass sealing material for thermal battery and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] According to the molar proportion of table 1, take by weighing 500 grams of analytically pure raw materials of total amount (raw material is made of SiO 2 , BaO, Na 2 O, K 2 O, Al 2 o 3 , B 2 o 3 , Li 2 O, La 2 o 3 Composition), add 1000 grams of agate balls and 650 ml of absolute ethanol, put them into a 1000 ml agate ball mill jar, and use a ball mill for ball milling for 24 hours; then pass the slurry through a 120-mesh sieve and dry at 85°C; press the biscuit; put it into a platinum crucible Heating the biscuit to 1480°C with a high-temperature silicon-molybdenum furnace in an air atmosphere, and keeping it warm for 1 hour; then take out the crucible, pour the melt on a brass plate to quench, and obtain a glass frit; then break, grind, Pass through a 325-mesh sieve to obtain raw glass powder. Mix the raw glass powder with polyvinyl alcohol and water evenly, and use centrifugal spray granulation to obtain glass particles; the spray pressure is 15kg / cm 3 ; N...

Embodiment 2

[0031] According to the molar proportion of table 1, take by weighing total amount 500 grams of analytically pure raw materials (this raw material is made of SiO 2 , BaO, Na 2 O, K 2 O, Al 2 o 3 , B 2 o 3 , Li 2 O, La 2 o 3 Composition according to the mass ratio), add 1000 grams of agate balls and 650 ml of absolute ethanol, put into a 1000 ml agate ball mill jar, and use a ball mill for ball milling for 24 hours; then the slurry is passed through a 120-mesh sieve, and dried at 85 ° C; pressed green body; Put it into a platinum crucible, heat the biscuit to 1450°C with a high-temperature silicon-molybdenum furnace in an air atmosphere, and keep it warm for 1 hour; then take out the crucible, pour the melt on a brass plate for quenching, and obtain a glass frit; then break it , grinding, and passing through a 325-mesh sieve to obtain raw glass powder. Mix the raw glass powder with polyvinyl alcohol and water evenly, and use centrifugal spray granulation to obtain glas...

Embodiment 3

[0033] This embodiment proceeds according to the following steps:

[0034] 1) Prepare the raw materials according to the molar ratio of the following components:

[0035] SiO 2 : 80%; BaO: 3%; Na 2 O: 5%; K 2 O: 4%; B 2 o 3 : 3%; La 2 o 3 : 5%.

[0036] Add each component into a ball mill and mix, add absolute ethanol to the mixed raw material in an amount of 1.3ml / g, ball mill for 20 hours, sieve, dry at 85°C, and press into a green body that can be put into a crucible.

[0037] 2) Put the biscuit pressed in step 1) into a platinum crucible, heat it to 1480°C with a high-temperature silicon-molybdenum furnace in an air atmosphere, and keep it warm for 1 hour; then take out the crucible, pour the melt on a brass plate to quench, Obtain a glass frit.

[0038] 3) Crushing, grinding, vibrating and sieving the glass frit to obtain raw glass powder.

[0039] 4) The raw glass powder, the binder and the water are uniformly mixed at a mass ratio of 100:4:60, and the glass pa...

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Abstract

The invention discloses a glass sealing material for a thermal battery and a preparation method thereof. The invention is characterized in that the glass sealing material comprises the following components in percentage by mole : 60-80% of SiO2, 3-15% of BaO, 5-15% of Na2O, 4-15% of K2O, 0-6% of Al2O3, 0-6% of B2O3, 0-5% of Li2O, and 0-5% of La2O3. The glass sealing material disclosed by the invention basically comprises SiO2, Al2O3 and B2O3, is added with proper matching of alkali metal oxide (mixed alkali effect) so as to control a softening point and viscosity of glass, improve the flowability of the glass and improve the performance of glass powder by adding modified oxides such as La2O3 with certain content and auxiliary ingredients, so that the wetting property of the glass to a titanium battery cover is improved. In addition, the invention prepares the glass sealing material by reasonable manufacturing technologies such as smelting, clearing, pulverizing, granulating and the like, so that the leakage rate of a sealing cover of the thermal battery produced by the sealing material disclosed by the invention is less than 1.0 multiplied by 10-10Pa.m<3> / s, and the insulation resistance is improved by more than one times compared with that of the sealing cover produced by the prior art.

Description

technical field [0001] The invention belongs to the technical field of thermal batteries, and relates to a glass sealing material for thermal batteries, in particular to a glass sealing material especially suitable for light-weight titanium thermal batteries and a preparation method thereof Background technique [0002] Thermal battery is a kind of high-temperature energy source, the working temperature is as high as 350-550℃, and it has high specific energy, high specific power, wide ambient temperature, long storage time (10-25 years), short activation time (0.2-2s), output With the advantages of high current density and no need for maintenance, it is widely used in various weapons and equipment in the aerospace field such as missiles, anti-missile missiles, cannons, rockets, satellites, spacecraft, torpedoes and military aircraft. With the continuous development of national defense and the continuous miniaturization of weapons and equipment, reducing weight and volume has...

Claims

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Application Information

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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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