mn掺杂纳米Al2O3的合成与发光研究

O. Khomenko, I. Berezovskaya, I. Stoyanova, N. Efryushina, V. Dotsenko, N. Poletaev, M. E. Khlebnikova
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引用次数: 0

摘要

采用燃烧法制备了掺杂Mn3+的al2o3。结果表明:制备的粉体粒径为10 ~ 70 nm,由过渡态氧化铝$(\delta^{*}, \delta,\ \theta)$组成,其中以$\delta^{*}$ -多晶型为主。Mn3+离子的存在导致在400 ~ 620nm区域有较宽的吸收带,但没有观察到这些离子的发射,可能是由于强的Jahn-Teller效应。结果表明,部分Mn杂质离子以+2氧化态存在,在$\delta^{\star}-\mathrm{A}1_{2}\mathrm{O}_{3}$中占据四面体位置,产生较宽的发射带,最大发射带在520 nm处。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Synthesis and Luminescence Study of Mn-doped Nanosized Al2O3
Mn3+-doped Al2O3was obtained by combustion method. It was found that the resulting powder, with particle sizes of 10–70 nm, consists of a mixture of transition aluminas $(\delta^{*}, \delta,\ \theta)$, among which $\delta^{*}$ -polymorph is dominant. The presence of Mn3+ ions results in a wide absorption band in the 400–620 nm region, but no emission of these ions was observed, probably due to a strong Jahn-Teller effect. It is shown that a part of Mn impurity ions exists in the oxidation state +2 and occupies tetrahedral positions in the $\delta^{\star}-\mathrm{A}1_{2}\mathrm{O}_{3}$, causing a broad emission band with a maximum at 520 nm.
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