Eu2+掺杂等摩尔KCl:KBr固溶体中第二相沉淀物的形态和定向生长:使用掺杂离子作为荧光染料的落射荧光显微镜研究

IF 1.8 4区 工程技术
Microscopy Pub Date : 2019-11-01 DOI:10.1093/jmicro/dfz110
Adolfo Ernesto Cordero-Borboa;Rodrigo Unda-Angeles
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引用次数: 0

摘要

本文报道了Eu2+掺杂等摩尔KCl:KBr固溶体中第二相沉淀物的形状和取向。为了做到这一点,通过使用Eu2+离子本身作为荧光染料来记录一些沉淀场的不同光学截面的显微镜图像,以及这些场中的一些代表性沉淀的显微镜图像。从这些图像中,相应的沉淀物场和单个沉淀物被电子重建到宿主晶格空间中。以前,KCl:KBr:Eu2+系统通过吸收和荧光光学分光光度法进行表征,以适当地调整荧光镜单元,并通过粉末和单板X射线衍射进行表征,从而将主体晶格取向与观察到的沉淀物的晶格取向相关联。这些被成形为板,具有平行于主晶格{100}、{110}或{120}planes(分别为{100}、{110}和{120}沉淀物),并且作为棒,与主晶格方向对齐(沉淀物)。{100}、{110},{120}-precipitate宽面的形状为72.6°菱形、矩形和59.5°菱形,一侧分别沿主晶格和方向,另一侧沿一个方向。详细描述了典型的沉淀物场和典型的{100}、{110}、{120}和{100>沉淀物的空间重构,以及它们相应的电子三维几何模型。讨论了四种不同的铕沉淀态是沉淀的原因,并且沉淀晶格与主晶格在空间上是相干的。首次研究了等摩尔KCl:KBr固溶体中铕第二相沉淀物的形状和空间取向与基体晶格的关系。这是通过使用掺杂的二价铕离子作为荧光染料的外延光学显微镜进行的。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Morphology and orientated growth of second-phase precipitates in a Eu2+-doped equimolar KCl:KBr solid solution: an epifluorescence microscopy study by using the doping ion as a fluorochrome
The shape and orientation of second-phase precipitates in a Eu 2+ -doped equimolar KCl:KBr solid solution are reported in this paper as they were unveiled by epifluorescence microscopy. To make this, microscopy images of different optical cross sections of some precipitate fields and, also, of some representative precipitates in these fields, were recorded by using the Eu 2+ ion itself as a fluorochrome. From these images, the corresponding precipitate fields and individual precipitates were electronically reconstructed into the host lattice space. Previously, the KCl:KBr:Eu 2+ system was characterized by absorption and fluorescence optical spectrophotometry, to tailor properly the fluorescence mirror unit, as well as by powder and single-plate X-ray diffraction, to correlate the host lattice orientation with those of the observed precipitates. These are shaped as plates, with broad faces parallel to host lattice {100}, {110} or {120}planes (the {100}, {110} and {120} precipitates, respectively), and as rods, aligned with a host lattice ˂100> direction (the ˂100> precipitates). The {100}, {110}, {120}-precipitate broad faces are in the shapes of 72.6° rhomboids, rectangles and 59.5° rhomboids, with a side lying along host lattice <310>, <110> and <421> directions, respectively, and with another side lying along a <100> direction. A typical precipitate field and the spatial reconstructions of typical {100}, {110}, {120} and ˂100> precipitates, as well as their corresponding electronic 3D-geometrical models, are described in detail. It is discussed that four different europium precipitation states are responsible for the precipitation and that the precipitate lattices are spatially coherent with the host lattice. The shapes and spatial orientations, in relation to the matrix lattice, of europium second-phase precipitates in an equi-molar KCl:KBr solid solution host are studied for the fi rst time ever. This was performed by epifl uorescence optical microscopy by using the doping divalent europium ion as a fl uorochrome.
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来源期刊
Microscopy
Microscopy 工程技术-显微镜技术
自引率
11.10%
发文量
0
审稿时长
>12 weeks
期刊介绍: Microscopy, previously Journal of Electron Microscopy, promotes research combined with any type of microscopy techniques, applied in life and material sciences. Microscopy is the official journal of the Japanese Society of Microscopy.
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