The effect pH on purification of Fe in the preparation of high purity Al2O3 by Crystallization
- https://doi.org/10.2991/meic-14.2014.146How to use a DOI?
- Precursor; high purity alumina; Fe; pH; Crystallization
minium; There are many advantages of high purity alumina. hydroxide as raw material, through making ammonium aluminum sulfate as precursor, prepared high purity alumina after high temperature in this study. By adding ammonia to adjust the pH of the precursor in this experiment. make range of pH from 1 to 5. Sintering in the muffle furnace and heat for 2 hours under 1200 , alumina is produced. Using atomic absorption spectrophotometer to measure the content of Fe, the relationship between content of Fe and pH, the differential thermal analyzer was used to study the pyrolysis process of precursor, the reaction process of precursor were analyzed, and use XRD to analyze phase and content of Fe of alumina, use SEM observe crystal morphology of high purity alumina. Results showed that Fe content of alumina increases decreases first and increase after with pH, under pH=3, impurities of Fe content in the minimum is 7.56 mg/kg, alumina crystals for granular and dispersivity is good, stable after 1200 degrees of calcined, XRD results showed that only diffraction peak of Al203.
- © 2014, the Authors. Published by Atlantis Press.
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Cite this article
TY - CONF AU - Wen Lu AU - Tingyi Chen PY - 2014/11 DA - 2014/11 TI - The effect pH on purification of Fe in the preparation of high purity Al2O3 by Crystallization BT - Proceedings of the 2014 International Conference on Mechatronics, Electronic, Industrial and Control Engineering PB - Atlantis Press SP - 654 EP - 657 SN - 2352-5401 UR - https://doi.org/10.2991/meic-14.2014.146 DO - https://doi.org/10.2991/meic-14.2014.146 ID - Lu2014/11 ER -