| 李晓龙,李步云,杨韬,李万富,华绍春.化学通报,2018,81(5):439-444. |
| 新型“114”构型氧化物的合成及其掺杂诱导结构演变 |
| Synthesis of Novel |
| 投稿时间：2017-11-21 修订日期：2018-03-16 |
| DOI： |
| 中文关键词: 高温固相法 掺杂 结构演变 |
| 英文关键词:High temperature solid phase method Ion doping Structure evolution |
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| 中文摘要: |
| 由于结构中特殊的四面体层，使得“114”化合物在磁性和存储氧性质方面有潜在的应用价值。本文以传统的高温固相法合成新型化合物YBaZn3GaO7，在其八面体位掺杂有效半径更小的Sc3+，得到全固熔化合物Y1-xScxBaZn3GaO7(x=0~1)。结构精修确定此系列“114”化合物空间群为P63mc，并解析其结构后发现随着掺杂量的增多结构有明显的演变趋势。从YBaZn3GaO7到ScBaZn3GaO7晶胞参数线性减小，以及通过对各配位元素键长的分析，说明随着掺杂量增加，结构畸变减小，应力减小，四面体配位中的Zn2+和Ga3+得到整合，从而得到结构更加稳定的“114”化合物。 |
| 英文摘要: |
| With special tetrahedral layer in the structure, “114” compounds have potential application value in terms of magnetic property and oxygen storage. In this article, conventional high-temperature solid-state reaction method is used to synthesize new compound YBaZn3GaO7, in which Sc3+ with smaller effective radius is doped in octahedral site to obtain the total solid solution compound Y1-xScxBaZn3GaO7(x=0~1). Structural refining determines the space group of the series of “114” compounds to be P63mc, and structural analysis shows that the structure has obvious evolution trend with increasing doping. From YBaZn3GaO7 to ScBaZn3GaO, the cell parameter decreases linearly. In addition, according to analysis on bond length of each coordination element, increasing doping quantity may reduce structural aberration and stress to allow for integration of Zn2+and Ga3+ in tetrahedral coordination, thus obtaining “114” compounds with more stable structure. |
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