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Microwave attenuation material having low sintering temperature

A microwave attenuation material and particle size technology, applied in layered products, chemical instruments and methods, metal layered products, etc., can solve the problem of high sintering temperature of Al-Si-Fe

Inactive Publication Date: 2009-09-23
INST OF ELECTRONICS CHINESE ACAD OF SCI
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  • Application Information

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Problems solved by technology

[0004] The object of the present invention is to propose a microwave attenuating material with a low sintering temperature to solve the problem that the sintering temperature of the ferrosilicon (FeSiAl) microwave attenuating material is relatively high in the field of microwave electric vacuum device manufacturing technology.

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Embodiment

[0038] Typical formula and properties of microwave attenuating materials with low sintering temperature:

[0039] Table 4 Formula of transition layer powder

[0040]

[0041] Formulation of table 5 middle layer powder

[0042]

[0043] Formulation of table 6 surface layer powder

[0044]

[0045] Tables 4, 5 and 6 respectively show the typical formulations of microwave attenuating materials with low sintering temperature. The composition of the aluminum silicon iron (FeSiAl) alloy is: iron Fe84.7wt%, silicon Si6.7wt%, aluminum Al8.6wt%. The parts coated with the above materials were sintered in a hydrogen furnace at 975°C for 45 minutes to obtain a firmly bonded sintered coating. figure 2 The cross-sectional fracture morphology of the sintered coating is given. It can be clearly seen from the figure that the coating is composed of a transition layer, an intermediate layer and a surface layer. After testing, this coating can form up to 31dB at...

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Abstract

A microwave attenuating material with low sinter temp is composed of transition-layer powder containing Ni nanoparticles, middle-layer powder containing Fe nanoparticles and surface-layer powder containing Fe nanoparticles. Its sinter temp is decreased by 50 deg.C due to said Ni and Fe nanoparticles.

Description

technical field [0001] The invention belongs to the technical field of microwave electric vacuum device manufacture, and is a microwave attenuation material with low sintering temperature. Background technique [0002] In the field of microwave electric vacuum device manufacturing technology, microwave attenuating materials are indispensable key materials for microwave electric vacuum devices, especially high-power devices, because they can broaden the frequency band, suppress oscillation and eliminate non-design modes. Ferrosilicon (FeSiAl) powder and its sintered coating are a highly efficient microwave attenuating material developed in Russia, and have been widely used in high-power microwave devices. However, this material usually needs to be sintered at a temperature of 1020°C±20°C. Since the sintering temperature is close to the melting point (1083°C) of the oxygen-free copper substrate, the problem of deformation of copper parts due to high sintering temperature often...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B32B15/02B22F7/02
Inventor 张永清丁耀根钱书珍徐振英黄云平周小攀
Owner INST OF ELECTRONICS CHINESE ACAD OF SCI