Preparation of luminescent material for thin-film nuclear battery

Abstract

The invention relates to preparation of a film nuclear battery luminescent material. The film nuclear battery luminescent material comprises an inorganic powder matrix material, a radioactive activator consisting of radioactive elements and a co-activator consisting of metal ions, the method is characterized in that a matrix material is a sulfide alkaline earth metal material, a radioactive activator is radioactive isotope particles, a co-activator is a metal ion compound, and the matrix material and the co-activator are mixed and sintered at a high temperature in a protective atmosphere to form the afterglow luminescent material; the preparation method comprises the following steps: preparing a self-excitation luminescent material, adding a radioactive activator, carrying out low-temperature diffusion to prepare the self-excitation luminescent material, carrying out surface coating treatment on the self-excitation luminescent material, and then coating the self-excitation luminescent material on the surface of a film photovoltaic cell, so that the photovoltaic cell generates 10-100 millivolts of voltage per square centimeter. The thin-film nuclear battery luminescent material disclosed by the invention is relatively strong in luminescence under the excitation of alpha or beta particles, can be used for a tiny nuclear battery, and forms a nuclear battery device which is thin in thickness, high in efficiency, good in safety, light in weight and long in service life.

Description

technical field [0001] The field of the invention relates to the preparation of a luminescent material for a fluorescent method nuclear battery. Background technique [0002] Micro-voltage nuclear batteries have been widely used to maintain the daily work of marine, geological, oil well, and aerospace instrumentation equipment. The nuclear battery designed by the existing representative luminescence method (fluorescence method) mainly uses radioactive elements such as tritium to excite the luminescent material sealed on the glass tube wall to produce continuous luminescence, which is then converted by a photoelectric device to form a fluorescence method nuclear battery. Existing high-energy particle detection is usually based on organic or inorganic scintillators, such as inorganic cesium iodide, etc., but its disadvantages are low luminous efficiency, large volume, and easy moisture. Powder luminescent materials have the advantages of high luminous efficiency, stable perfo...

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Problems solved by technology

Existing high-energy particle detection is usually based on organic or inorganic scintillators, such as inorganic cesium iodide, etc., but its disadvantages are low luminous efficiency, large volume, and easy moisture

Powder luminescent materials have the advantages of high luminous efficiency, stable performance, and easy processing. The common tritium-excited luminescent material systems are based on the luminescent materials of the cathode ray system, such as yttrium oxysulfide europium that emits red light, and zinc copper sulfide that emits green light. , blue-emitting zinc-silver sulfide, etc. These luminescent materials are often used in conjunction with photomultiplier tubes for fluorescence nuclear detection instruments. Therefore, fluorescent nuclear batteries still use these types of luminescent materials and other luminescent materials for lamps. Their defects are the main ones. The absorption spectrum is at 253-365nm, relying on radioactive elements to continuously produce high-energy particles, otherwise it cannot continue to emit light

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