High-nonlinearity ZnO-based polycrystalline ceramic as well as preparation method and application thereof

A high nonlinearity, ceramic technology, applied in the field of high nonlinearity ZnO-based polycrystalline ceramics and its preparation, can solve the problems of limiting the application of wide-bandgap semiconductor materials, immature growth technology, etc., and achieves reduction of material cost and simple preparation method. , the effect of reducing exercise time

Active Publication Date: 2022-04-12
XI AN JIAOTONG UNIV
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Problems solved by technology

Therefore, the current large-volume, high-quality wide-bandgap semiconductor material growth technology is still immature, which limits the application of wide-bandgap semiconductor materials in the field of nuclear radiation detection.

Method used

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  • High-nonlinearity ZnO-based polycrystalline ceramic as well as preparation method and application thereof
  • High-nonlinearity ZnO-based polycrystalline ceramic as well as preparation method and application thereof
  • High-nonlinearity ZnO-based polycrystalline ceramic as well as preparation method and application thereof

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Embodiment Construction

[0025] The present invention will be further described in detail below in conjunction with specific embodiments, which are explanations of the present invention rather than limitations.

[0026] A preparation method of highly nonlinear ZnO-based polycrystalline ceramics, comprising the following steps:

[0027] 1) Use analytically pure raw materials: 93.42mol% ZnO, 1.2mol% Bi 2 o 3 ,1.1mol%Co 2 o 3 ,0.5mol%MnCO 3 , 1.3mol% NiO, 1.48mol% SiO 2 and 1mol% Sb 2 o 3 , after weighing according to the stoichiometric ratio, ball mill in a planetary ball mill, and the mixed slurry after ball milling is dried, ground and sieved, the drying temperature is 80°C, the time of ball milling is 12h, and the speed of ball milling is 300r. min -1 , The screen is 100 mesh screen.

[0028] 2) Preparation: After step 1), the uniformly mixed precursor powder is granulated, stale, tabletted, and debinding, and then sintered in an air atmosphere; the sintering conditions are: heat up from roo...

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Abstract

The invention provides a high-nonlinearity ZnO-based polycrystalline ceramic and a preparation method and application thereof.A natural Schottky barrier structure can be formed at the grain boundary of the ZnO polycrystalline ceramic formed through a sintering process, a back-to-back Schottky barrier model device is formed in a series mode through metal electrodes and the prepared ZnO polycrystalline ceramic, and the high-nonlinearity ZnO-based polycrystalline ceramic is obtained. The influence of device electrode and material defects on the performance of the nuclear radiation detector is reduced, and the X-ray detector with ultra-large volume and 10ns-order time resolution is realized at extremely low cost.

Description

technical field [0001] The invention belongs to the field of semiconductor nuclear radiation X-ray detection devices, and in particular relates to a highly nonlinear ZnO-based polycrystalline ceramic and its preparation method and application. Background technique [0002] Semiconductor nuclear radiation detectors have the characteristics of high sensitivity, high energy resolution, small size and easy integration, high spatial resolution, fast response speed, and wide linear range. Has application prospects. At present, the materials of commercialized semiconductor nuclear radiation detectors are still mainly narrow-bandgap semiconductors such as silicon (Si), germanium (Ge), and cadmium telluride (CdTe). In contrast, wide-bandgap semiconductor materials have better radiation resistance characteristics due to their larger binding energy, and wide-bandgap semiconductors have lower intrinsic carrier concentrations, and can work normally at room temperature or even high tempe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/453C04B35/622C04B41/90G01T1/02
CPCY02P70/50
Inventor 周磊簜武康宁
Owner XI AN JIAOTONG UNIV
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