研究目的
To investigate sensitive elements based on oxyfluoride glasses with molecular clusters of silver for application in fiber-optic temperature sensors.
研究成果
The oxyfluoride glasses with silver molecular clusters exhibit temperature-dependent luminescence quenching, with sensitivities up to 0.056 dB/°C. Sample 2 (with samarium ions) showed higher sensitivity than Sample 1. The materials are suitable for fiber-optic temperature sensors due to their wide temperature range and renewable characteristics, with acceptable luminescence power attenuation (up to 25.7%).
研究不足
The measurement error was up to 5%. The study focused on specific glass compositions and temperature ranges (30-200°C), and further optimization may be needed for other conditions or materials.
1：Experimental Design and Method Selection:
The study involved measuring the temperature dependence of luminescence intensity in oxyfluoride glasses containing silver molecular clusters and samarium ions. A setup was designed to excite luminescence with a laser and record spectra at various temperatures using a fiber spectrometer.
2：Sample Selection and Data Sources:
Oxyfluoride glasses of the SiO2-AlF3-PbF2-CdF2-ZnF2 system with additions of AgNO3 (5 mol.%) and SmF3 (2 mol.%) were used as samples.
3：List of Experimental Equipment and Materials:
Equipment included a furnace, semiconductor laser (KLM405-3-6, wavelength 405 nm), separating element, reference photodiode (PD-9K), fiber spectrometer (AvaSpec-2048), personal computer, thermocouple, and multimeter. Materials were the glass samples.
4：Experimental Procedures and Operational Workflow:
Samples were placed in a furnace, excited by the laser at 405 nm, and luminescence was recorded by the spectrometer. Temperature was monitored with a thermocouple and multimeter. Data were normalized for analysis.
5：Data Analysis Methods:
Luminescence intensity was normalized; spectral characteristics and temperature dependences were plotted. Sensitivity was calculated in dB/°C for different wavelengths and integral characteristics.
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