研究目的
To probe the structural and spectroscopic properties of phosphatic shale samples for potential use as a phosphor material and in other applications such as biological sensors.
研究成果
Phosphatic shale, primarily composed of fluorapatite with rare earth and actinide dopants, exhibits multifunctional properties including tunable photoluminescence with white light emission and high dielectric constant, making it a potential material for optical, biological, and dielectric applications such as phosphors and sensors.
研究不足
The study is limited to natural phosphatic shale samples with specific impurities; synthetic or other natural samples may yield different results. The presence of defects and low concentrations of rare earth ions could affect luminescence and dielectric properties, and further optimization might be needed for practical applications.
1:Experimental Design and Method Selection:
The study involved structural, optical, and dielectric characterization using techniques like XRD, Raman spectroscopy, FTIR, EDXRF, UV-vis-NIR spectroscopy, PL, TRPL, dielectric measurements, and EPR to analyze phosphatic shale samples.
2:Sample Selection and Data Sources:
Phosphatic shale samples were obtained from the Atomic Minerals Directorate for Exploration and Research, purified using gravimetric methods with heavy liquid separation using bromoform and methylene iodide.
3:List of Experimental Equipment and Materials:
Equipment included Rigaku X-ray diffractometer, Renishaw Invia Raman spectrometer, Perkin Elmer FTIR spectrometer, PANalytical Epsilon 5 EDXRF instrument, FLS980 fluorescence spectrometer, Novacontrol impedance analyzer, Varian 112 ESR spectrometer, and various lasers and lamps for excitation. Materials included KBr for FTIR, silver paste for dielectric measurements, and DPPH standard for EPR.
4:Experimental Procedures and Operational Workflow:
Samples were prepared by purification, powdering, and pelletizing for different analyses. Measurements were conducted at room temperature with specified parameters for each technique, such as step sizes, dwell times, and frequency ranges.
5:Data Analysis Methods:
Data were analyzed using Rietveld refinement with Material Studio software, Tauc plots for band gap calculation, multi-exponential decay fitting for TRPL, CIE calculations for chromaticity, and Cole-Cole plots for dielectric properties.
独家科研数据包,助您复现前沿成果,加速创新突破
获取完整内容-
X-ray diffractometer
Rigaku
Rigaku
Used for powder X-ray diffraction to analyze the crystal structure of phosphatic shale samples.
暂无现货
预约到货通知
-
FTIR spectrometer
Perkin Elmer
Perkin Elmer
Used for Fourier transform infrared spectroscopy to identify vibrational modes of functional groups.
暂无现货
预约到货通知
-
EDXRF instrument
PANalytical Epsilon 5
PANalytical
Used for energy dispersive X-ray fluorescence to detect presence of elements like U, Eu, Dy, Tb.
暂无现货
预约到货通知
-
Fluorescence spectrometer
FLS980
Edinburgh Instruments Ltd
Used for steady-state photoluminescence and PL excitation spectra measurements.
-
Raman spectrometer
Renishaw Invia
Renishaw
Used for Raman spectroscopy to verify purity and crystallinity of the sample.
暂无现货
预约到货通知
-
Impedance analyzer
Novacontrol
Novacontrol
Used for dielectric and AC conductivity measurements.
暂无现货
预约到货通知
-
ESR spectrometer
Varian 112
Varian
Used for electron spin resonance spectroscopy to study paramagnetic defects.
暂无现货
预约到货通知
-
Pulse diode laser
nanosecond pulse diode laser
Used for time-resolved photoluminescence decay measurements.
暂无现货
预约到货通知
-
Xenon flash lamp
xenon microsecond flash lamp
Used for time-resolved photoluminescence decay measurements.
暂无现货
预约到货通知
-
登录查看剩余7件设备及参数对照表
查看全部