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Preparation method of LiZn ferrite ceramic with high density and low ferromagnetic resonance line width
The invention discloses a preparation method of LiZn ferrite ceramic with high density and low ferromagnetic resonance line width, which comprises the following steps: weighing raw materials according to a formula to obtain a mixture A; carrying out primary ball milling on the prepared mixture A by adopting a wet process, uniformly mixing and drying to obtain a mixture B; pre-sintering the obtained mixture B, and preserving heat; carrying out secondary ball milling on the pre-sintered mixture B, and pressing into a green body after ball milling; carrying out vacuum hot pressed sintering on the pressed green body; and annealing the green body subjected to vacuum hot pressing sintering to obtain the LiZn ferrite ceramic with high compactness and low ferromagnetic resonance line width. The density of the LiZn ferrite ceramic prepared by the invention is obviously increased, and the ferromagnetic resonance line width is reduced by about 20%. The density of the material is increased through hot pressing sintering, crystal grains are more uniform, the ferromagnetic resonance line width is obviously reduced finally, and help is provided for application of LiZn ferrite ceramic in high-performance microwave electromagnetic devices. The method has the characteristics of simplicity in operation, controllable parameters, high repeatability and the like.
本发明公开了一种高致密度、低铁磁共振线宽LiZn铁氧体陶瓷的制备方法，包括：按配方称取原材料，得到混合物A；将制备得到的混合物A采用湿法工艺一次球磨，混合均匀后烘干，得到混合物B；将得到的混合物B预烧后保温；将预烧后的混合物B进行二次球磨，球磨后压制为生坯；对压制的生坯进行真空热压烧结；对真空热压烧结后的生坯进行退火，得到高致密、低铁磁共振线宽LiZn铁氧体陶瓷。本发明制备的LiZn铁氧体陶瓷密度显著增大，铁磁共振线宽降低了约20％。热压烧结使得材料密度增加，晶粒更均匀，最终使得铁磁共振线宽明显降低，为LiZn铁氧体陶瓷在高性能微波电磁器件中的应用提供帮助。本发明具有操作简单、参数可控、可重复度高等特点。
Preparation method of LiZn ferrite ceramic with high density and low ferromagnetic resonance line width
The invention discloses a preparation method of LiZn ferrite ceramic with high density and low ferromagnetic resonance line width, which comprises the following steps: weighing raw materials according to a formula to obtain a mixture A; carrying out primary ball milling on the prepared mixture A by adopting a wet process, uniformly mixing and drying to obtain a mixture B; pre-sintering the obtained mixture B, and preserving heat; carrying out secondary ball milling on the pre-sintered mixture B, and pressing into a green body after ball milling; carrying out vacuum hot pressed sintering on the pressed green body; and annealing the green body subjected to vacuum hot pressing sintering to obtain the LiZn ferrite ceramic with high compactness and low ferromagnetic resonance line width. The density of the LiZn ferrite ceramic prepared by the invention is obviously increased, and the ferromagnetic resonance line width is reduced by about 20%. The density of the material is increased through hot pressing sintering, crystal grains are more uniform, the ferromagnetic resonance line width is obviously reduced finally, and help is provided for application of LiZn ferrite ceramic in high-performance microwave electromagnetic devices. The method has the characteristics of simplicity in operation, controllable parameters, high repeatability and the like.
本发明公开了一种高致密度、低铁磁共振线宽LiZn铁氧体陶瓷的制备方法，包括：按配方称取原材料，得到混合物A；将制备得到的混合物A采用湿法工艺一次球磨，混合均匀后烘干，得到混合物B；将得到的混合物B预烧后保温；将预烧后的混合物B进行二次球磨，球磨后压制为生坯；对压制的生坯进行真空热压烧结；对真空热压烧结后的生坯进行退火，得到高致密、低铁磁共振线宽LiZn铁氧体陶瓷。本发明制备的LiZn铁氧体陶瓷密度显著增大，铁磁共振线宽降低了约20％。热压烧结使得材料密度增加，晶粒更均匀，最终使得铁磁共振线宽明显降低，为LiZn铁氧体陶瓷在高性能微波电磁器件中的应用提供帮助。本发明具有操作简单、参数可控、可重复度高等特点。
Preparation method of LiZn ferrite ceramic with high density and low ferromagnetic resonance line width
一种高致密度、低铁磁共振线宽LiZn铁氧体陶瓷的制备方法
XIONG ZHENGWEI (author) / ZHU WENKUN (author) / GAO ZHIPENG (author)
2022-12-09
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
High-performance nanometer LiZn ferrite magnetic core material
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