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Tritium isotope microcell and preparation method thereof

A micro-battery and isotope technology, which is applied in the fields of obtaining electric energy from radioactive sources, nuclear engineering, and the application of radioactive source radiation, can solve the problems of short service life and poor safety of tritium isotope micro-batteries, and achieve safe and reliable preparation methods and small size Effect

Inactive Publication Date: 2012-05-09
INST OF NUCLEAR PHYSICS & CHEM CHINA ACADEMY OF
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  • Application Information

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Problems solved by technology

[0006] In order to overcome the short life and poor safety of the tritium isotope micro-battery in...

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  • Tritium isotope microcell and preparation method thereof
  • Tritium isotope microcell and preparation method thereof

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Embodiment Construction

[0028] The content of the present invention will be further described below in conjunction with the drawings.

[0029] figure 1 It is a schematic diagram of the structure of a tritium isotope micro battery of the present invention. figure 1 Among them, the tritium isotope miniature battery of the present invention contains an energy conversion unit and auxiliary components, and the energy conversion unit includes titanium deuteride + titanium tritide radiation layer 7, Si 3 N 4 Layer 8, silicon-based PN junction 9; accessory components include outer packaging layer 1, ring electrode 2, positive lead 3, positive electrode 4, gold layer 5, base 6, negative electrode 10, negative lead 11, ceramic sheet 12; its connection The relationship is, Si 3 N 4 The layer 8 is located on the upper surface of the silicon-based PN junction 9; the ring electrode 2 is on the Si 3 N 4 The epitaxial layer 8; the lower surface of the silicon-based PN junction 9 is the gold layer 5, one end of the ne...

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Abstract

The invention discloses a tritium isotope microcell and a preparation method thereof. The microcell comprises two parts: a transduction unit and an attached part. A Si3N4 layer of the transduction unit is at the upper surface of a silicon-based PN junction; and a ring electrode in the attached part is at epitaxy of the Si3N4 layer. A titanium deuteride + titanium tritide emitting layer is formed by the following steps that: evaporation of a gold layer and a nickel layer is successively carried out on the upper surface of the Si3N4 layer; and deuterium-tritium mixing gas is used to prepare the emitting layer. The gold layer is arranged at the lower surface of the silicon-based PN junction; and one end of a negative wire is connected on the gold layer and the other end of the negative wire is connected on a negative electrode. One end of a positive wire is connected to the ring electrode; and the other end of the positive wire is connected to a positive electrode. Besides, a ceramic chip is arranged below the gold layer and is arranged at the midpoint of a pedestal; and an outer encapsulated layer is used to cover the external portion of the pedestal. According to the invention, the tritium isotope microcell has a micro body size; when the microcell works, there is no need to provide energy from the external world; and uninterruptedly outputting over six years with current of 40 nA to 1 microamp and a power of 60 nW to 0.1 microwatt. Besides, the provided preparation method has advantages of security and reliability.

Description

technical field [0001] The invention belongs to the field of miniature isotope batteries, in particular to a tritium isotope miniature battery and a preparation method thereof. Background technique [0002] During the decay process, radioactive isotopes will spontaneously emit particles (such as α, β, γ particles, etc.), and these particles contain a certain amount of energy, which is called decay energy. An isotope battery is an energy supply device that converts this decay energy directly or indirectly into electrical energy. [0003] There are more than 10 mechanisms by which isotope batteries convert decay energy into electrical energy. However, in the production of micro batteries, isotope batteries of many mechanisms cannot take into account the three requirements of small size, long life and maintenance-free. In the literature titled "Energy Conversion of Three-dimensional Macroporous Silicon-based Junctions to the Volatile and Photovoltaic Effects" (J.P.Clarkson et...

Claims

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Application Information

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IPC IPC(8): G21H1/06
Inventor 胡睿刘业兵王维笃杨玉青李昊王关全罗顺忠钟正坤张华明
Owner INST OF NUCLEAR PHYSICS & CHEM CHINA ACADEMY OF
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