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Gradient porous Ti3AlC2/SiC wave-absorbing shielding composite material and preparation method thereof
The invention relates to the field of porous wave-absorbing/shielding ceramic composite materials, in particular to a gradient porous Ti3AlC2/SiC wave-absorbing shielding composite material and a preparation method thereof. The material is prepared by a template dipping-pyrolysis sintering method, wherein a foam template is 20ppi polyurethane (PU) foam. The method comprises the following specific operation steps: (1) pretreating a PU template: cutting PU foam into an ideal size, sequentially carrying out alkali washing and polyethylene glycol dipping, and drying; (2) preparing slurry: mixing Ti3AlC2 and SiC powder according to different proportions, and ball-milling for 2-4 hours to obtain slurry with different raw material proportions; 3) dipping the template, namely repeatedly dipping the pretreated template in slurry with different proportions in sequence according to a certain sequence; and 4) pyrolysis sintering: after completely drying the impregnated foam, carrying out pyrolysis sintering in an inert atmosphere to obtain the gradient porous Ti3AlC2/SiC composite material. The gradient porous Ti3AlC2/SiC composite material is high in porosity, complete in pore structure, good in uniformity, good in impedance matching with free space and excellent in electromagnetic absorption and shielding performance.
本发明涉及多孔吸波/屏蔽陶瓷复合材料领域，具体为一种梯度多孔Ti3AlC2/SiC吸波屏蔽复合材料及其制备方法。采用模板浸渍‑热解烧结的方法制备该材料，其中泡沫模板为20ppi的聚氨酯(PU)泡沫。具体操作步骤如下：1)PU模板预处理：将PU泡沫切割成理想的尺寸，并先后进行碱洗和聚乙二醇浸渍并烘干；2)浆料配制：将Ti3AlC2和SiC粉末以不同配比混合球磨2～4h，得到不同原料配比的浆料；3)模板浸渍：将预处理之后的模板按一定顺序依次在不同比例的浆料中反复浸渍；4)热解烧结：将完成浸渍的泡沫彻底干燥后，在惰性气氛下进行热解烧结得到梯度多孔Ti3AlC2/SiC复合材料。该梯度多孔Ti3AlC2/SiC复合材料孔隙率高，孔结构完整，均匀性好，与自由空间阻抗匹配较好，具有优异的电磁吸收和屏蔽性能。
Gradient porous Ti3AlC2/SiC wave-absorbing shielding composite material and preparation method thereof
The invention relates to the field of porous wave-absorbing/shielding ceramic composite materials, in particular to a gradient porous Ti3AlC2/SiC wave-absorbing shielding composite material and a preparation method thereof. The material is prepared by a template dipping-pyrolysis sintering method, wherein a foam template is 20ppi polyurethane (PU) foam. The method comprises the following specific operation steps: (1) pretreating a PU template: cutting PU foam into an ideal size, sequentially carrying out alkali washing and polyethylene glycol dipping, and drying; (2) preparing slurry: mixing Ti3AlC2 and SiC powder according to different proportions, and ball-milling for 2-4 hours to obtain slurry with different raw material proportions; 3) dipping the template, namely repeatedly dipping the pretreated template in slurry with different proportions in sequence according to a certain sequence; and 4) pyrolysis sintering: after completely drying the impregnated foam, carrying out pyrolysis sintering in an inert atmosphere to obtain the gradient porous Ti3AlC2/SiC composite material. The gradient porous Ti3AlC2/SiC composite material is high in porosity, complete in pore structure, good in uniformity, good in impedance matching with free space and excellent in electromagnetic absorption and shielding performance.
本发明涉及多孔吸波/屏蔽陶瓷复合材料领域，具体为一种梯度多孔Ti3AlC2/SiC吸波屏蔽复合材料及其制备方法。采用模板浸渍‑热解烧结的方法制备该材料，其中泡沫模板为20ppi的聚氨酯(PU)泡沫。具体操作步骤如下：1)PU模板预处理：将PU泡沫切割成理想的尺寸，并先后进行碱洗和聚乙二醇浸渍并烘干；2)浆料配制：将Ti3AlC2和SiC粉末以不同配比混合球磨2～4h，得到不同原料配比的浆料；3)模板浸渍：将预处理之后的模板按一定顺序依次在不同比例的浆料中反复浸渍；4)热解烧结：将完成浸渍的泡沫彻底干燥后，在惰性气氛下进行热解烧结得到梯度多孔Ti3AlC2/SiC复合材料。该梯度多孔Ti3AlC2/SiC复合材料孔隙率高，孔结构完整，均匀性好，与自由空间阻抗匹配较好，具有优异的电磁吸收和屏蔽性能。
Gradient porous Ti3AlC2/SiC wave-absorbing shielding composite material and preparation method thereof
一种梯度多孔Ti3AlC2／SiC吸波屏蔽复合材料及其制备方法
XU JINGJUN (author) / YAO PEI (author) / LI MEISHUAN (author) / ZUO JUN (author)
2022-07-12
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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