Abstract

Phosphor Ca₂La_6.8Eu_1.2(SiO₄)₆O_2−δ is obtained via coprecipitation and the nitrate-citrate pyrolysis method. The structure and phase composition of the synthesized apatite silicates are studied using XRD. The luminescence spectra of the sample are registered before and after pressing at pressures above 5 GPa. The magnetic properties are analyzed by means of ESR spectroscopy and vibration magnetometry. The concentrations of Eu²⁺ ions and constants (λ) of optical splitting between ⁷F_J levels in the initial sample, and in the sample after hot pressing, are calculated.

中文翻译：

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硅酸磷灰石结构基质中的高压Eu 3+→Eu 2+还原

摘要

通过共沉淀和硝酸盐柠檬酸盐热解法得到磷光体Ca ₂ La _6.8 Eu _1.2（SiO ₄）₆ O _2-δ。利用XRD研究了合成的磷灰石硅酸盐的结构和相组成。在高于5 GPa的压力下按压之前和之后，记录样品的发光光谱。磁性能通过ESR光谱和振动磁力分析法进行分析。计算初始样品以及热压后样品中Eu ²⁺离子的浓度和⁷ F _J能级之间的光学分裂常数（λ）。