The oxidation state of europium in halide glasses.
The oxidation state of europium in halide glasses.
复制标题
卤化物玻璃中铕的氧化态。
DOI：
10.1088/0953-8984/23/49/495402
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发表时间：
2011
期刊：
影响因子：
--
通讯作者：
Johnson,JA
中科院分区：
文献类型：
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作者：
Weber,JKR;Vu,M;Passlick,C;Schweizer,S;Brown,DE;Johnson,CE;Johnson,JA
二价铕离子的发光特性可以被利用来生产用于X射线成像应用的存储磷光体。二价铕卤化物的相对高的成本和有限的可用性使得期望从容易获得的三价盐合成它们。在本工作中，纯EuCl 3和掺杂EuCl 3的氟化物玻璃熔体样品在惰性气氛炉中在700-800 ℃下处理。使用荧光和穆斯堡尔光谱法测定所得材料中的Eu氧化态。纯EuCl 3在710 ℃下热处理10 min，得到了含有约等量Eu 2+和Eu 3+的材料。在起始材料中使用EuCl 2和EuCl 3的混合物制成的玻璃含有两种氧化态。本文介绍了样品的制备和分析，并讨论了在熔体中的化学平衡的背景下的结果。
The luminescent properties of divalent europium ions can be exploited to produce storage phosphors for x-ray imaging applications. The relatively high cost and limited availability of divalent europium halides makes it desirable to synthesize them from the readily available trivalent salts. In this work, samples of pure EuCl 3 and fluoride glass melts doped with EuCl 3 were processed at 700–800 C in an inert atmosphere furnace. The Eu oxidation state in the resulting materials was determined using fluorescence and Mössbauer spectroscopy. Heat treatment of pure EuCl 3 for 10 min at 710 C resulted in a material comprising approximately equal amounts of Eu 2+ and Eu 3+. Glasses made using mixtures of EuCl 2 and EuCl 3 in the starting material contained both oxidation states. This paper describes the sample preparation and analysis and discusses the results in the context of chemical equilibria in the melts.