Exploration of boron removal from molten silicon by introducing oxygen resources into ammonia blowing treatment
Exploration of boron removal from molten silicon by introducing oxygen resources into ammonia blowing treatment
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DOI：
10.1080/00084433.2018.1507781
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发表时间：
2018-08
影响因子：
0.9
通讯作者：
Zhiyuan Chen;Yuliu You;Kazuki Morita
中科院分区：
文献类型：
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作者：
Zhiyuan Chen;Yuliu You;Kazuki Morita
摘要吹氨脱硼已成功地应用于硅精炼工艺中。熔铁催化剂能有效地提高脱硼率。它启发了将氨吹炼与其他精炼处理相结合的尝试。为了进一步降低硅中的硼含量，在工艺中引入了氧源。然而，无论是造渣+喷氨还是加湿+喷氨都没有分别显示出对硅精炼过程的显著积极改善。实验结果表明，在氨体系中引入氧源会降低氮化硼的活性或生成Si_2N_2O，从而阻碍含硼挥发分的有效生成。
ABSTRACT Ammonia gas blowing has been successfully applied to the silicon refining process for boron removal. Molten iron catalyst could effectively promote the boron removal ratio in the progress. It inspired the attempt of combining ammonia blowing with other refining treatments. Oxygen resources were introduced into the process in order to further decrease the boron content in silicon. However, neither slagging + ammonia blowing nor humidification + ammonia blowing shows a significant positive improvement in the silicon refining process, respectively. The experimental results implied that the introduction of oxygen sources into the ammonia system would decrease boron nitride activity or produce Si2N2O which retard the efficient generation of boron-bearing volatiles.