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PREPARATION OF NANO-SIZED -ALUMINA PARTICLES
PREPARATION OF NANO-SIZED -ALUMINA PARTICLES
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机译：纳米氧化铝颗粒的制备
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摘要
PURPOSE: Provided is a preparation method of nano-sized α-Al2O3 particles having uniform size and shape, low temperature synthesis, and high purity without contamination of alkali metals by chemical method using glycol solution containing α-Fe2O3 or α-Al2O3 as a seed. CONSTITUTION: The nano-sized α-Al2O3 particles containing alkali metal(Na or K) less than 20ppm in size are prepared by the following steps of: adding a seed solution, obtained by dispersing α-Fe2O3(50-60nm) or α-Al2O3 to ethanol, to glycol solution, 1,4-butanediol, and heating to 100deg.C to evaporate ethanol; adding 0.25-1.0M(based on the total amount of glycol solution) of aluminum propoxide, and heating to 200deg.C and stirring for 2hrs for glycolate reaction; glycothermal reacting by heating at a rate of 3deg.C/min to 230deg.C for 3-48hrs and 250deg.C for 3-48hrs in case that α-Al2O3 and α-Fe2O3 are use as a seed, respectively.
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机译：目的：提供了一种通过使用含有α-Fe2O3或α-Al2O3的乙二醇溶液的化学方法，制备具有均匀尺寸和形状，低温合成和高纯度而无碱金属污染的纳米级α-Al2O3颗粒的制备方法。作为种子。组成：碱金属（Na或K）小于20ppm的纳米级α-Al2O3颗粒是通过以下步骤制备的：添加种子溶液，通过分散α-Fe2O3（50-60nm）或将α-Al2 O 3转化为乙醇，乙二醇溶液，1，4-丁二醇，并加热至100℃以蒸发掉乙醇;加入0.25-1.0M（以乙二醇溶液总量为基准）的丙醇铝，加热至200℃，搅拌2小时，进行乙醇酸酯反应。在分别将α-Al2 O 3和α-Fe2 O 3用作种子的情况下，通过以3℃/ min的速率加热至230℃持续3-48小时和250℃持续3-48小时来进行糖热反应。
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