2010年1月21日 · Calcium fluoride nanocrystals (CaF 2) were synthesized by two different techniques namely co-precipitation and hydrothermal. The synthesized nanocrystals were characterized by powder X-ray diffraction (PXRD), Fourier transform infrared red spectroscopy (FTIR), scanning electron microscopy (SEM), optical absorption and photoluminescence (PL).

2016年11月15日 · The CaF 2 exhibit single phase identified for X-ray diffraction (XRD) and confirmed by Rietveld refinement. Scanning electron microscopy (SEM) images showed nanoparticles with non-uniform morphology and statistical analysis of collections of particles reviewed that the EDA decreases both the average particle size and average aspect ratio of the ...

CaF2 nanoparticles were synthesized by a facile one-step reaction and characterized by N2 physisorption at 77 K, XRD, and TEM. The adsorption of Zn(II) and Pb(II) fits well with Elovich and ...

The present study aimed to investigate the simultaneous effects of calcium fluoride nanoparticles (CaF2 NPs) and lactobacillus reuteri ATCC PTA 6475 (L. reuteri) against osteoporosis in an ...

In (A) the XRD patterns of CaF 2 are shown: pure CaF 2 (black color), humidified and ball-milled CaF 2 electrolyte (A, red color) and repeated treatment (B, blue color). (B) shows the 19 F-MAS-NMR spectrum with a broad bulk resonance without notable indication of a surface defect peak.

caf_2单晶体以其稳定的物理,化学,机械性能广泛用于航空航天领域制作棱镜,透镜.在实际加工过程中,caf_2单晶体不可避免地产生不同的损伤类型.这些损伤使caf_2光学器件的使用寿命与精度严重降低.为了降低caf_2单晶体在加工过程中产生的损伤,需要分析晶体加工后亚 ...

本文在Re(Pr,Eu,Dy)∶CaF2晶体中共掺Y3+或Gd3+作为调剂离子，通过XRD衍射、吸收及发射光谱测试、荧光寿命测试、荧光量子效率测试等测试方法，发现Y3+或Gd3+离子可以改变稀土离子格位结构的对称性，调节格位结构的多样性，一方面解决了掺Pr3+离子晶体量子效率低的 ...

具体如下： 根据大尺寸CaF2单晶镜片[111]轴(CaF2[111])的几何特性提出了XRD分析法。 首先，定义了单晶镜片的X，Y，Z轴和φ，ω，θ倾转。 然后利用出射X射线具有一定宽度，在XOZ衍射平面内先调平，让出射X射线最大光子处，在0°位置。

XRD analysis confirmed the existence of semi-crystalline PVA and PEG aggregates, and the CaF2 cubic crystalline phase appears when an additive of CaF2 nanoparticles up to 0.003 g.

为此本文以准确表征加工后CaF2单晶体表面/亚表面产生的损伤类型为核心目的，以GIXD无损检测与基于分子动力学仿真结果的XRD仿真检测为基本手段，通过检测结果与仿真结果分析了CaF2单晶体在加工过后表面/亚表面存在的缺陷类型。 分子动力学压痕仿真可以描述材料变形过程，压痕仿真结束后体系亚表面产生了不同的缺陷类型，引起体系晶格间不同程度的畸变。 首先通过压痕仿真结束后体系的XRD衍射仿真结果，将衍射仿真谱线的变化与材料微观结构变化联系起来，证 …