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Cesium releasing agent for realizing low-temperature controlled release of cesium and manufacturingmethod of releaser used for cesium releasing agent

A releaser and releaser technology, which is applied in the field of preparation of cesium releaser and the releaser used therein, can solve problems such as the complex structure design of the cesium releaser, and achieve the effects of reasonable design, excellent cesium release performance, and improved performance

Active Publication Date: 2016-04-13
GRIMAT ENG INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, the structure design of the existing cesium releaser is relatively complicated. Some need to make a connecting part between the heating electrode and the releaser body, especially the steam escape outlet part, and some have a groove cut on the releaser body. The body of the releaser is connected with a nickel-chromium wire, and the gap between the groove and the nickel-chrome wire is used as the steam escape outlet; voids as steam escape outlets

Method used

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  • Cesium releasing agent for realizing low-temperature controlled release of cesium and manufacturingmethod of releaser used for cesium releasing agent
  • Cesium releasing agent for realizing low-temperature controlled release of cesium and manufacturingmethod of releaser used for cesium releasing agent

Examples

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Effect test

Embodiment 1

[0032] Using cesium chromate as cesium salt, cesium chromate is mixed with modified ZrVFe getter to make a cesium release agent; the atomic ratio (Cs / Zr) value of Cs in the cesium salt and Zr in the reducing agent in the cesium release agent is 1.2.

[0033] Put the releaser equipped with the above-mentioned cesium releaser into the photocathode system of the third-generation low-light night vision device. After vacuuming the photocathode system, heat the cesium releaser with current. The heating current is 0.1A / min. The slope increases; when the heating current is 2.9A, cesium vapor is released, and the cesium vapor starts to be released based on the detection by the quadrupole mass spectrometer, and the temperature of the cesium release is 490°C when tested by an infrared thermometer. The number of cesium releases is greater than 300 times.

Embodiment 2

[0035] Using cesium chromate as cesium salt, cesium chromate is mixed with modified ZrVFe getter to make a cesium release agent; the atomic ratio (Cs / Zr) value of Cs in the cesium salt and Zr in the reducing agent in the cesium release agent is 0.9.

[0036] Put the releaser equipped with the above-mentioned cesium releaser into the photocathode system of the third-generation low-light night vision device. After vacuuming the photocathode system, heat the cesium releaser with current. The heating current is 0.1A / min. The slope increases; when the heating current is 2.5A, cesium vapor is released, and the cesium vapor starts to be released based on the detection by the quadrupole mass spectrometer, and the cesium release temperature is 460°C when tested with an infrared thermometer. The number of cesium releases is greater than 300 times.

Embodiment 3

[0038] Using cesium tungstate as cesium salt, cesium chromate is mixed with modified ZrVFe getter to make a cesium release agent; the atomic ratio (Cs / Zr) value of Cs in the cesium salt in the cesium release agent and Zr in the reducing agent is 0.6.

[0039] Put the releaser equipped with the above-mentioned cesium releaser into the photocathode system of the third-generation low-light night vision device. After vacuuming the photocathode system, heat the cesium releaser with current. The heating current is 0.1A / min. The slope increases; when the heating current is 1.6A, cesium vapor is released, and the cesium vapor begins to be released based on the detection by the quadrupole mass spectrometer, and the cesium release temperature is 320°C when tested with an infrared thermometer. The number of cesium releases is greater than 300 times.

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Abstract

The invention discloses a cesium releasing agent for realizing low-temperature controlled release of cesium and a manufacturing method of a releaser used for the cesium releasing agent, belonging to the field of cesium releasing agents for third-generation low-light level night vision devices and releasers used for the cesium releasing agents. The cesium releasing agent comprises a cesium salt and a reducing agent, wherein the cesium salt is cesium chromate or cesium tungstate, and the reducing agent is a modified ZrVFe getter. The releaser is produced by processing an NiCr alloy pipe, a Cs steam escape outlet is formed through laser boring in the pipe, the middle part of the pipe is filled with the cesium releasing agent and is subjected to press molding, and meanwhile two ends of the pipe are clamped to be flat so as to be used as heating electrodes. If being put into a low-light level night vision device, the manufacturedreleaser is found to have the cesium releasing temperature of 300-500 DEG C and the cesium releasing frequency of 300-400 times and to be freeof releasing harmful impurity gases and controllable in release rate and release amount; and the steam escape outlet of the releaser is reasonably designed, and the evaporation uniformity of Cs on a photoelectric cathode is good, so that the performance of the photoelectric cathode with negative electron affinity (NEA) is remarkably improved.

Description

technical field [0001] The invention belongs to the field of a cesium releaser and a releaser for third-generation low-light night vision devices, and in particular relates to a low-temperature controllable release of cesium cesium releaser and a method for preparing the releaser used therein. Background technique [0002] Low-light night vision technology is dedicated to exploring the acquisition, conversion, recording and display of target image information at night and other low-light conditions. This technology can effectively expand human vision in the time domain, space and frequency domain. Internationally, low-light night vision technology has been advanced to the third generation in 1979. The core component of the third-generation low-light night vision device is the negative electron affinity (NEA) photocathode, and one of the keys to making high-quality NEA photocathode One is the cesium oxygen activation process of the cathode. During activation, it is necessary...

Claims

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Application Information

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IPC IPC(8): C22B26/10C22C16/00
CPCC22B26/10C22C16/00
Inventor 熊玉华杨志民崔建东张艳
Owner GRIMAT ENG INST CO LTD
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