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Method for preparing aluminum oxide microspheres with graded directional porous structure through spray freeze drying
The invention belongs to the technical field of powder material preparation, and particularly relates to a method for preparing aluminum oxide microspheres with a graded directional porous structure through spray freeze drying. The invention provides a method for preparing aluminum oxide microspheres by combining spray freeze drying with a heat treatment technology. The alumina microsphere prepared by the method has a graded directional porous structure, and meanwhile, the alumina microsphere prepared by the method is low in density and high in porosity. The density and pore structure of the alumina microspheres provided by the invention can be regulated and controlled by controlling the concentration of an aluminum source solution. According to the aluminum oxide microspheres provided by the invention, the shrinkage rate of the aluminum oxide microspheres in heat treatment can be regulated and controlled by controlling the doping amount of the nanometer aluminum oxide. According to the alumina microspheres provided by the invention, the phase transition temperature of the alumina microspheres can be regulated and controlled by controlling the doping amount of the sodium silicate, so that the use temperature of the gamma-alumina microspheres is improved.
本发明属于粉体材料制备技术领域，特别涉及一种喷雾冷冻干燥制备具有分级定向多孔结构的氧化铝微球。本发明提供喷雾冷冻干燥结合热处理技术制备氧化铝微球的方法。本发明制备的氧化铝微球具有分级定向多孔结构，同时本方法制备的氧化铝微球密度低，孔隙率高。本发明提供的氧化铝微球可以通过控制铝源溶液的浓度而调控其密度与孔隙结构。本发明提供的氧化铝微球可以通过控制纳米氧化铝的掺入量而调控其在热处理中的收缩率。本发明提供的氧化铝微球可以通过控制硅酸钠的掺入量而调控其相转变温度，进而提高γ‑氧化铝微球使用温度的方法。
Method for preparing aluminum oxide microspheres with graded directional porous structure through spray freeze drying
The invention belongs to the technical field of powder material preparation, and particularly relates to a method for preparing aluminum oxide microspheres with a graded directional porous structure through spray freeze drying. The invention provides a method for preparing aluminum oxide microspheres by combining spray freeze drying with a heat treatment technology. The alumina microsphere prepared by the method has a graded directional porous structure, and meanwhile, the alumina microsphere prepared by the method is low in density and high in porosity. The density and pore structure of the alumina microspheres provided by the invention can be regulated and controlled by controlling the concentration of an aluminum source solution. According to the aluminum oxide microspheres provided by the invention, the shrinkage rate of the aluminum oxide microspheres in heat treatment can be regulated and controlled by controlling the doping amount of the nanometer aluminum oxide. According to the alumina microspheres provided by the invention, the phase transition temperature of the alumina microspheres can be regulated and controlled by controlling the doping amount of the sodium silicate, so that the use temperature of the gamma-alumina microspheres is improved.
本发明属于粉体材料制备技术领域，特别涉及一种喷雾冷冻干燥制备具有分级定向多孔结构的氧化铝微球。本发明提供喷雾冷冻干燥结合热处理技术制备氧化铝微球的方法。本发明制备的氧化铝微球具有分级定向多孔结构，同时本方法制备的氧化铝微球密度低，孔隙率高。本发明提供的氧化铝微球可以通过控制铝源溶液的浓度而调控其密度与孔隙结构。本发明提供的氧化铝微球可以通过控制纳米氧化铝的掺入量而调控其在热处理中的收缩率。本发明提供的氧化铝微球可以通过控制硅酸钠的掺入量而调控其相转变温度，进而提高γ‑氧化铝微球使用温度的方法。
Method for preparing aluminum oxide microspheres with graded directional porous structure through spray freeze drying
一种喷雾冷冻干燥制备具有分级定向多孔结构的氧化铝微球
ZHANG JINGJIE (author) / LUO YUAN (author) / YAN KAIQI (author)
2024-11-15
Patent
Electronic Resource
Chinese
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