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Porous SiCNnw/C/Si3N4 composite wave-absorbing ceramic and preparation method thereof
The invention relates to a porous SiCNnw/C/Si3N4 composite wave-absorbing ceramic and a preparation method thereof, and belongs to the field of ceramic-based wave-absorbing materials. The porous SiCNnw/C/Si3N4 composite wave-absorbing ceramic comprises a porous Si3N4 ceramic matrix, a wave-absorbing phase carbon layer and a wave-absorbing phase SiCN nanowire, wherein the surface of the pore wall of the porous Si3N4 ceramic matrix is uniformly coated with the wave-absorbing phase carbon layer, and the wave-absorbing phase SiCN nanowire uniformly grows in the pores of the porous Si3N4 ceramic matrix; wherein the total mass of the carbon layer and the SiCN nanowire is 1-10 wt% of the porous Si3N4 ceramic matrix. Wave-absorbing phases with two different structures, namely a carbon layer and a SiCN nanowire, are introduced into a pore structure of Si3N4 matrix ceramic, and the two components of the wave-absorbing phases can synergistically exert the advantages of the components, so that the impedance matching degree of the material is optimized, and the absorption bandwidth of the material is widened. Moreover, the process is simple, the proportion of the two wave-absorbing phases can be regulated and controlled by changing the heat treatment temperature so as to optimize the impedance matching degree of the material, and the prepared porous SiCNnw/C/Si3N4 composite ceramic is good in wave-absorbing performance.
本发明涉及一种多孔SiCNnw/C/Si3N4复合吸波陶瓷及其制备方法，属于陶瓷基吸波材料领域。所述多孔SiCNnw/C/Si3N4复合吸波陶瓷包括多孔Si3N4陶瓷基体以及均匀包裹在所述多孔Si3N4陶瓷基体孔壁表面的吸波相碳层和均匀生长在所述多孔Si3N4陶瓷基体孔洞中的吸波相SiCN纳米线；其中，所述碳层和SiCN纳米线的总质量为多孔Si3N4陶瓷基体的1～10wt％。通过在Si3N4基体陶瓷的孔结构中引入碳层和SiCN纳米线这两种不同结构的吸波相，该吸波相双组分能协同发挥各组分的优势，优化材料阻抗匹配度，拓宽材料的吸收带宽。而且，本发明所述工艺简单，能够通过改变热处理温度调控两种吸波相的比例从而优化材料的阻抗匹配度，所制得的多孔SiCNnw/C/Si3N4复合陶瓷吸波性能好。
Porous SiCNnw/C/Si3N4 composite wave-absorbing ceramic and preparation method thereof
The invention relates to a porous SiCNnw/C/Si3N4 composite wave-absorbing ceramic and a preparation method thereof, and belongs to the field of ceramic-based wave-absorbing materials. The porous SiCNnw/C/Si3N4 composite wave-absorbing ceramic comprises a porous Si3N4 ceramic matrix, a wave-absorbing phase carbon layer and a wave-absorbing phase SiCN nanowire, wherein the surface of the pore wall of the porous Si3N4 ceramic matrix is uniformly coated with the wave-absorbing phase carbon layer, and the wave-absorbing phase SiCN nanowire uniformly grows in the pores of the porous Si3N4 ceramic matrix; wherein the total mass of the carbon layer and the SiCN nanowire is 1-10 wt% of the porous Si3N4 ceramic matrix. Wave-absorbing phases with two different structures, namely a carbon layer and a SiCN nanowire, are introduced into a pore structure of Si3N4 matrix ceramic, and the two components of the wave-absorbing phases can synergistically exert the advantages of the components, so that the impedance matching degree of the material is optimized, and the absorption bandwidth of the material is widened. Moreover, the process is simple, the proportion of the two wave-absorbing phases can be regulated and controlled by changing the heat treatment temperature so as to optimize the impedance matching degree of the material, and the prepared porous SiCNnw/C/Si3N4 composite ceramic is good in wave-absorbing performance.
本发明涉及一种多孔SiCNnw/C/Si3N4复合吸波陶瓷及其制备方法，属于陶瓷基吸波材料领域。所述多孔SiCNnw/C/Si3N4复合吸波陶瓷包括多孔Si3N4陶瓷基体以及均匀包裹在所述多孔Si3N4陶瓷基体孔壁表面的吸波相碳层和均匀生长在所述多孔Si3N4陶瓷基体孔洞中的吸波相SiCN纳米线；其中，所述碳层和SiCN纳米线的总质量为多孔Si3N4陶瓷基体的1～10wt％。通过在Si3N4基体陶瓷的孔结构中引入碳层和SiCN纳米线这两种不同结构的吸波相，该吸波相双组分能协同发挥各组分的优势，优化材料阻抗匹配度，拓宽材料的吸收带宽。而且，本发明所述工艺简单，能够通过改变热处理温度调控两种吸波相的比例从而优化材料的阻抗匹配度，所制得的多孔SiCNnw/C/Si3N4复合陶瓷吸波性能好。
Porous SiCNnw/C/Si3N4 composite wave-absorbing ceramic and preparation method thereof
一种多孔SiCNnw/C/Si3N4复合吸波陶瓷及其制备方法
YAO XIUMIN (author) / BAI JIALIN (author) / LIU XUEJIAN (author) / XIE ZHUOCHENG (author) / HUANG ZHENGREN (author)
2024-07-05
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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