A sealed radioactive source of a betavoltaic isotope battery and a preparation method thereof

A technology of isotope battery and radioactive source, which is applied in the field of sealed radioactive source of radioisotope battery and its preparation, can solve the problems of not meeting the requirements of radioisotope battery, low radioactivity loading, and low surface emissivity, etc. Achieve the effect of low cost, cost reduction and high surface emissivity

Active Publication Date: 2018-11-23
INST OF NUCLEAR PHYSICS & CHEM CHINA ACADEMY OF
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The advantage of these methods of manufacturing sealed radioactive sources is that the uniformity of the source core is good, but the disadvantages are that the process is complicated, the production cost is high, and at the same time, a large amount of radioactive waste liquid will be produced, the source of the block is seriously absorbed, the electroplating source is affected by the electroplating deposition efficiency and the radioactive source. The influence of specific activity, its radioactive loading is not high, the two are generally 2π utilization (that is, single-sided source), and the surface emissivity of the source is low, which is not enough to meet the requirements of radioisotope batteries

Method used

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  • A sealed radioactive source of a betavoltaic isotope battery and a preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0024] figure 1 It is the overall schematic diagram of the sealed radioactive source used in the radioisotope battery.

[0025] Such as figure 1 Among them, the lower metal film 2 and the upper metal film 4 are titanium films with a thickness of 10 μm; the lower metal support ring 1, the middle metal support ring 7 and the upper metal support ring 8 are titanium rings with a thickness of 0.3 mm and a ring width of 1 mm; source core 3 is 147 Pm radiation source; the lower organic polymer film 5 and the upper and lower organic polymer film 6 are polymethyl methacrylate with a molecular weight of 300.

[0026] The preparation steps are as follows:

[0027] Use a 10ml volumetric flask to prepare a 10g / l polymethylmethacrylate / chloroform solution. high specific activity 147 The Pm solution was diluted to 1 mCi / μl. The titanium film is attached to the circular titanium ring and laser welded to form two upper and lower shells. Add 150 μl of polymethylmethacrylate / chloroform so...

Embodiment 2

[0029] figure 1 Among them, the lower metal film 2 and the upper metal film 4 are aluminum films with a thickness of 15 μm; the lower metal support ring 1, the middle metal support ring 7 and the upper metal support ring 8 are nickel rings with a thickness of 1.0 mm and a ring width of 1.5 mm; Radioactive source core 3 is 90 The Sr radiation source; the lower organic polymer film 5 and the upper and lower organic polymer film 6 are polyimide / chloroform solutions with a molecular weight of 3000.

[0030] The preparation steps are as follows:

[0031] A 15 g / l polyimide / chloroform solution with a molecular weight of 3000 was prepared in a 10 ml volumetric flask. high specific activity 90The Sr solution was diluted to 0.5 mCi / μl. The aluminum film is attached to the square titanium metal ring and laser welded to form two upper and lower shells. Add 300 μl of polyimide / chloroform solution dropwise to the lower shell. Put the 170 μm thick cellulose material into the lower she...

Embodiment 3

[0033] figure 1 Among them, the lower metal film 2 and the upper metal film 4 are titanium films with a thickness of 10 μm; the lower metal support ring 1, the middle metal support ring 7 and the upper metal support ring 8 are titanium rings with a thickness of 0.8 mm and a ring width of 2 mm; source core 3 is 63 Ni radiation source; the lower organic polymer film 5 and the upper and lower organic polymer film 6 are polystyrene acetonitrile solutions with a molecular weight of 15,000.

[0034] The preparation steps are as follows:

[0035] Use a 10ml volumetric flask to prepare a 15g / l polystyrene / acetonitrile solution. high specific activity 63 The Ni solution was diluted to 50 μCi / μl. The titanium film is attached to the square titanium metal ring and laser welded to form two upper and lower shells. Add 100 µl of polystyrene / acetonitrile solution dropwise to the lower shell. Put the 210 μm thick cellulose material into the lower shell and add 300 μl of 63 Ni solution,...

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Abstract

The invention discloses a sealed radioactive source structure of a betavoltaic isotope battery and a preparation method thereof. The sealed radioactive source is composed of a lower layer metal support ring, a lower layer metal film, a radioactive source core, an upper layer metal film, a lower layer organic polymer film, an upper layer organic polymer film, a middle layer metal support ring and an upper layer metal support ring. The preparation method has the advantages of simple and easily-controllable processes and less radioactive source waste; the manufactured sealed radioactive source isuniform in activity distribution; less raw material is used and self-absorption of active layers is less; 4 pi utilization (double-face source) is realized, so that the maximum utilization rate of the radioactive source is achieved.

Description

technical field [0001] The invention belongs to the fields of micro-energy and radioactive source preparation, and in particular relates to a sealed radioactive source of a radioactive isotope battery and a preparation method thereof. Background technique [0002] The decay energy of radioisotopes is another important nuclear energy besides fission energy and fusion energy. Through certain energy conversion methods, radioisotopes can be used to manufacture special power sources - isotope batteries. Isotope batteries are characterized by high power density and long service life, and the energy released by radioactive isotopes when they decay is not affected by temperature, chemical reactions, pressure, electromagnetic fields and light waves in the external environment. It has strong anti-interference and work Stable and reliable characteristics are irreplaceable by other energy sources (solar cells, chemical cells, fuel cells). [0003] Radiovoltaic isotope battery is a rese...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G21H1/00G21G4/06
CPCG21G4/06G21H1/00
Inventor 熊晓玲胡睿董文丽秦传洲邓建杨玉青徐建李刚雷轶松刘业兵魏洪源杨宇川涂俊彭太平罗顺忠
Owner INST OF NUCLEAR PHYSICS & CHEM CHINA ACADEMY OF
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