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Carbon nanotube modified high-thermal-conductivity aluminum nitride ceramic substrate and preparation method thereof
The invention discloses a carbon nanotube modified high-thermal-conductivity aluminum nitride ceramic substrate and a preparation method thereof, and relates to the technical field of aluminum nitride ceramic materials.The preparation method comprises the following steps that firstly, aluminum nitride powder, a silane coupling agent and yttrium oxide powder are mixed and put into a ball milling tank, meanwhile, adding grinding balls and dispersion media, namely absolute ethyl alcohol and polyethylene glycol, carrying out wet ball milling, and sieving and defoaming to obtain tape casting slurry; 2, dipping long stapled cotton with continuous fibers by using the tape casting slurry obtained in the step 1, carrying out suction filtration, tape casting, punching and laminating processes to obtain an aluminum nitride ceramic wafer, feeding the aluminum nitride ceramic wafer into a debinding furnace, and carrying out glue removal to prepare an aluminum nitride ceramic biscuit; and 3, carrying out high-temperature sintering on the aluminum nitride ceramic biscuit prepared in the step 2 to obtain the aluminum nitride ceramic substrate. The aluminum nitride substrate is modified through the carbon nanotubes and the silane coupling agent, and the obtained ceramic substrate is compact in structure, high in thermal conductivity, high in bending strength and good in fracture toughness.
本发明公开了一种碳纳米管改性高导热氮化铝陶瓷基板及其制备方法，涉及氮化铝陶瓷材料技术领域，该制备方法包括以下步骤：步骤一：将氮化铝粉体、硅烷偶联剂和氧化钇粉体混合放入球磨罐中，同时加入磨球和分散介质无水乙醇和聚乙二醇进行湿法球磨，过筛除泡后获得流延浆料；步骤二：使用步骤一得到的流延浆料去浸渍具有连续纤维的长绒棉，经抽滤、流延、冲片、叠压工艺后得到氮化铝陶瓷素片，之后进入脱脂炉内进行排胶，制备氮化铝陶瓷素坯；步骤三：对步骤二制得的氮化铝陶瓷素坯进行高温烧结，得到氮化铝陶瓷基板。本发明通过碳纳米管和硅烷偶联剂对氮化铝基板进行改性，得到的陶瓷基板结构紧密、导热性高、抗弯强度高和断裂韧性好。
Carbon nanotube modified high-thermal-conductivity aluminum nitride ceramic substrate and preparation method thereof
The invention discloses a carbon nanotube modified high-thermal-conductivity aluminum nitride ceramic substrate and a preparation method thereof, and relates to the technical field of aluminum nitride ceramic materials.The preparation method comprises the following steps that firstly, aluminum nitride powder, a silane coupling agent and yttrium oxide powder are mixed and put into a ball milling tank, meanwhile, adding grinding balls and dispersion media, namely absolute ethyl alcohol and polyethylene glycol, carrying out wet ball milling, and sieving and defoaming to obtain tape casting slurry; 2, dipping long stapled cotton with continuous fibers by using the tape casting slurry obtained in the step 1, carrying out suction filtration, tape casting, punching and laminating processes to obtain an aluminum nitride ceramic wafer, feeding the aluminum nitride ceramic wafer into a debinding furnace, and carrying out glue removal to prepare an aluminum nitride ceramic biscuit; and 3, carrying out high-temperature sintering on the aluminum nitride ceramic biscuit prepared in the step 2 to obtain the aluminum nitride ceramic substrate. The aluminum nitride substrate is modified through the carbon nanotubes and the silane coupling agent, and the obtained ceramic substrate is compact in structure, high in thermal conductivity, high in bending strength and good in fracture toughness.
本发明公开了一种碳纳米管改性高导热氮化铝陶瓷基板及其制备方法，涉及氮化铝陶瓷材料技术领域，该制备方法包括以下步骤：步骤一：将氮化铝粉体、硅烷偶联剂和氧化钇粉体混合放入球磨罐中，同时加入磨球和分散介质无水乙醇和聚乙二醇进行湿法球磨，过筛除泡后获得流延浆料；步骤二：使用步骤一得到的流延浆料去浸渍具有连续纤维的长绒棉，经抽滤、流延、冲片、叠压工艺后得到氮化铝陶瓷素片，之后进入脱脂炉内进行排胶，制备氮化铝陶瓷素坯；步骤三：对步骤二制得的氮化铝陶瓷素坯进行高温烧结，得到氮化铝陶瓷基板。本发明通过碳纳米管和硅烷偶联剂对氮化铝基板进行改性，得到的陶瓷基板结构紧密、导热性高、抗弯强度高和断裂韧性好。
Carbon nanotube modified high-thermal-conductivity aluminum nitride ceramic substrate and preparation method thereof
一种碳纳米管改性高导热氮化铝陶瓷基板及其制备方法
WU CHAO (Autor:in) / ZHANG SHENGYANG (Autor:in) / SUN YEWEI (Autor:in) / WU YIFAN (Autor:in) / XIA YANGGUANG (Autor:in) / XIE SHIHUI (Autor:in)
27.02.2024
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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