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以廉价的铝锭和异丙醇为起始原料,采用独特的分离提纯、回收再利用技术和溶胶凝胶工艺,合成高性能纳米氧化铝粉体,并利用TEM,XRD和石墨炉原子吸收法等对粉体的相组成、形貌和杂质含量进行分析研究。得出原料对粉体的形貌和组成没有影响,两种不同的Al源均制备出了粒径为10～20nm,球形γ-Al2O3粉体;而原料和蒸馏工艺对纳米氧化铝粉体的纯度有影响,随铝锭纯度的增加,所制备的纳米氧化铝所含的微量杂质含量明显下降。和一次蒸馏相比,二次蒸馏所得产物的主要微量杂质明显下降。利用重熔铝锭为原料,采用二次蒸馏工艺,制得了纯度高达99.99%的纳米氧化铝,且在制备过程中没有废液,废气排出,实现了高纯纳米氧化铝粉体的低成本、环保型生产。
Using cheap aluminum ingot and isopropanol as starting materials, a unique separation and purification, recycling technology and sol-gel process were used to synthesize high-performance nano-alumina powder. TEM, XRD and graphite furnace atomic absorption spectrometry Such as the phase composition, morphology and impurity content analysis. The results showed that the raw materials had no influence on the morphology and composition of the powders. Two different Al sources prepared spherical γ-Al2O3 powders with a particle size of 10 ~ 20 nm. However, With the purity of the aluminum ingot increasing, the content of trace impurities contained in the prepared nano-alumina is obviously decreased. Compared with the first distillation, the main impurities of the second distillation product significantly decreased. Remelting aluminum ingots as raw materials, the use of secondary distillation process, the purity of up to 99.99% of the nano-alumina, and in the preparation process without waste, exhaust emissions, high purity nano-alumina powder to achieve low-cost, Environmentally friendly production.