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Preparation method of AlN porous ceramic with honeycomb directional structure
The invention discloses a preparation method of AlN porous ceramic with a honeycomb directional structure, and belongs to the field of ceramic material preparation. The preparation method comprises the following specific steps: mixing alumina powder, a sintering aid, ammonium polyacrylate and deionized water, carrying out ball milling to prepare slurry, adding a polypropylene glycol aqueous solution as a binder and carbon fiber powder as a carbon source into the ball-milled slurry, carrying out mechanical stirring and vacuum defoaming, and then carrying out freeze drying on the slurry to obtain the aluminum oxide-carbon fiber composite material. And sintering the dried block in an atmosphere sintering furnace, and finally removing carbon in an air atmosphere to obtain the honeycomb-shaped aluminum nitride (AlN) ceramic with an oriented structure. The method has the advantages of being low in raw material cost and simple in process, and the prepared AlN porous ceramic is obvious in honeycomb structure, high in purity, large in porosity, good in compression resistance, high in heat conductivity and low in cost, can be used as a heat conduction framework to be applied to phase change materials or heat conduction composite materials, and has wide application prospects in the fields of aviation, environmental protection, communication electric power and the like.
本发明公开了一种具有蜂窝状定向结构的AlN多孔陶瓷的制备方法，属于陶瓷材料制备领域。其具体步骤为：将氧化铝粉、烧结助剂、聚丙烯酸铵和去离子水混合球磨制备浆料，向球磨好的浆料中加入聚丙烯醇水溶液作粘结剂，碳纤维粉作碳源，进行机械搅拌和真空除泡，而后将浆料进行冷冻干燥，并将干燥后的块体放入气氛烧结炉中进行烧结，最后在空气气氛中除碳即可得到具有定向结构的蜂窝状氮化铝(AlN)陶瓷。本方法具有原料成本低、工艺简单的优点，且制备的AlN多孔陶瓷蜂窝状结构明显、纯度高、气孔率大、抗压性能好、热导率高、成本低廉，可作为热传导骨架应用于相变材料或导热复合材料，并在航空、环保、通讯电力等领域具有广泛的应用前景。
Preparation method of AlN porous ceramic with honeycomb directional structure
The invention discloses a preparation method of AlN porous ceramic with a honeycomb directional structure, and belongs to the field of ceramic material preparation. The preparation method comprises the following specific steps: mixing alumina powder, a sintering aid, ammonium polyacrylate and deionized water, carrying out ball milling to prepare slurry, adding a polypropylene glycol aqueous solution as a binder and carbon fiber powder as a carbon source into the ball-milled slurry, carrying out mechanical stirring and vacuum defoaming, and then carrying out freeze drying on the slurry to obtain the aluminum oxide-carbon fiber composite material. And sintering the dried block in an atmosphere sintering furnace, and finally removing carbon in an air atmosphere to obtain the honeycomb-shaped aluminum nitride (AlN) ceramic with an oriented structure. The method has the advantages of being low in raw material cost and simple in process, and the prepared AlN porous ceramic is obvious in honeycomb structure, high in purity, large in porosity, good in compression resistance, high in heat conductivity and low in cost, can be used as a heat conduction framework to be applied to phase change materials or heat conduction composite materials, and has wide application prospects in the fields of aviation, environmental protection, communication electric power and the like.
本发明公开了一种具有蜂窝状定向结构的AlN多孔陶瓷的制备方法，属于陶瓷材料制备领域。其具体步骤为：将氧化铝粉、烧结助剂、聚丙烯酸铵和去离子水混合球磨制备浆料，向球磨好的浆料中加入聚丙烯醇水溶液作粘结剂，碳纤维粉作碳源，进行机械搅拌和真空除泡，而后将浆料进行冷冻干燥，并将干燥后的块体放入气氛烧结炉中进行烧结，最后在空气气氛中除碳即可得到具有定向结构的蜂窝状氮化铝(AlN)陶瓷。本方法具有原料成本低、工艺简单的优点，且制备的AlN多孔陶瓷蜂窝状结构明显、纯度高、气孔率大、抗压性能好、热导率高、成本低廉，可作为热传导骨架应用于相变材料或导热复合材料，并在航空、环保、通讯电力等领域具有广泛的应用前景。
Preparation method of AlN porous ceramic with honeycomb directional structure
一种具有蜂窝状定向结构的AlN多孔陶瓷制备方法
WANG QI (author) / YU CHANG (author) / LI MENGYI (author) / WANG BAOKAI (author) / NIU MENGYANG (author) / SUN CHANG (author) / YUAN YUNQI (author)
2024-03-22
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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