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氧化铁掺杂对阿利特结构及活性的影响

DOI: 10.14062/j.issn.0454-5648.2015.08.14

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Abstract:

用X射线衍射结合Rietveld方法、热释光及微量热分析等,研究了Fe2O3掺杂对同时固溶有Na、K等多种杂质的典型组成阿利特的结构及性能的影响。结果表明阿利特晶型未发生改变,晶格常数随Fe2O3掺量呈线性变化,并在Fe固溶类型改变处(0.6%Fe2O3)发生突变,符合Vegard固溶体定律。阿利特水化活性和原始热释光性均显著降低,并呈现正相关性,且相关性主要体现在结晶成核与晶体生长控制过程。这一现象可以归因于储存在阿利特中的介稳能量,据此提出了Fe影响阿利特水化的新机制。

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