Abstract Flake aluminum hydroxide was prepared via neutralization with ammonia and aluminum nitrate solutions containing alumina at a concentration of 10 g/L. Meanwhile 0.5 g/L acetic acid was added to the solution as a shaping additive. The morphology control of neutralization allowed for the production of columnar and flake submicron aluminum hydroxide via precipitation in the Bayer process, which is widely used in alumina refineries. Finally, three morphology-control techniques were developed as followed: (1) during the growing of the crystal seed, the reaction solution should be maximally stabilized. Increased stable condition duration resulted in improved aluminum hydroxide morphology; (2) aluminum hydroxide morphology changed when different anions and additives were used in the reaction solution; and (3) separation of the nucleation stage and growing-up stage afforded aluminum hydroxide with perfect morphology.

中文翻译：

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湿化学合成制备氢氧化铝的形态控制技术

摘要 采用氨水和含氧化铝浓度为 10 g/L 的硝酸铝溶液中和制备片状氢氧化铝。同时将0.5g/L乙酸作为成型添加剂加入到溶液中。中和的形态控制允许通过拜耳法中的沉淀生产柱状和片状亚微米氢氧化铝，广泛用于氧化铝精炼厂。最后，开发了以下三种形态控制技术：（1）在晶种生长过程中，应最大限度地稳定反应溶液。稳定条件持续时间的增加导致氢氧化铝形态的改善；(2)反应液中加入不同的阴离子和添加剂后，氢氧化铝的形态发生了变化；