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首页> 外文期刊>Journal of Ceramic Processing Research. (Text in English) >Study on the fabrication processing of high-purity, high-density alumina green body prepared by a hydrothermal method
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Study on the fabrication processing of high-purity, high-density alumina green body prepared by a hydrothermal method

机译：水热法制备高纯度高密度氧化铝生坯的制备工艺研究

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摘要

Along with the recent increase in consumption of sapphire single crystals, the alumina green body of high-purity and high-density is required. The current manufacturing process for high-purity alumina using the aluminum or aluminum alkoxide compounds as a starting material had difficulties in mass production accompanied by the expensive equipments with high maintenance costs. Compared to this method, the high-purity alumina can be produced using the aluminum hydroxide dissolved in a caustic soda (sodium hydroxide) solution, in large quantity, with low cost. The mixing solution is aged for a certain period of time and then small amount of adsorbent is applied to selectively remove impurities in the solution. Finally a high purity alumina can be made from the refined solution. The alumina powders obtained through this method can be compacted and fired without any organic binder for the production of high-purity and high-density alumina green body. In this study, parameters in the manufacturing process employing the aluminum hydroxide to produce high-purity alumina were explored. And property changes of the final products were examined by varying the forming and firing parameters.
机译：随着近来蓝宝石单晶消耗的增加，需要高纯度和高密度的氧化铝生坯。当前使用铝或烷氧基铝化合物作为原料的高纯度氧化铝的制造方法难以大规模生产，伴随着昂贵的设备和高维护成本。与该方法相比，使用溶解在苛性钠（氢氧化钠）溶液中的氢氧化铝可以以低成本大量生产高纯度氧化铝。将混合溶液老化一定时间，然后施加少量吸附剂以选择性除去溶液中的杂质。最后，可以由精制溶液制备高纯度氧化铝。通过该方法获得的氧化铝粉末可以被压实和煅烧，而无需任何有机粘合剂，用于生产高纯度和高密度的氧化铝生坯。在这项研究中，探索了使用氢氧化铝生产高纯度氧化铝的制造过程中的参数。通过改变成型和烧制参数来检查最终产品的性能变化。

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