Fabrication, structure, and luminescent properties of Cr-doped CaMgSi₂O₆ fluorescent ceramics

Abstract

Chromium-doped CaMgSi2O6 (Cr[Formula: see text]: CMS) fluorescent ceramics with various concentrations were fabricated using solid-state reaction technique. All the samples were sintered at 1250[Formula: see text]C for 3 h. Analysis of microstructure of the Cr[Formula: see text]: CMS ceramics shows homogeneous structure with grain size distributions between 0.86 nm and 2.26 nm. Luminescent spectra of the ceramics show two emission peaks, a strong peak at 872 nm and a weak peak at 960 nm because of [Formula: see text] transition of the Cr[Formula: see text] ions. Intensity of the emission peaks increases with Cr[Formula: see text] concentration, reaches maximum with 0.1 at.% Cr[Formula: see text], then decreases with higher Cr[Formula: see text] concentration. Owing to the differences in crystal field strength, the luminescent properties of the Cr[Formula: see text]: CMS fluorescent ceramics and powder are quite different.

Phase transition monitoring and temperature sensing via FIR technology in Bi/Sm‐codoped KNN transparent ceramics

“…Luminescent materials have gained extensive application prospects in display lighting, anticounterfeiting, optical information storage, temperature sensing, and other fields on account of their particular optical properties. [1][2][3][4][5] Thereinto, optical temperature sensors via fluorescence intensity ratio (FIR) are rapidly developed, which is not susceptible to external interference in measurement, enriching the temperature measurement technology that holds significant implications on human daily life as well as scientific inquiry. [6][7][8][9] Moreover, FIR optical temperature sensors that exhibit multiple advantages of simple operation, fast response speed and high spatial resolution possess apparent preponderance over traditional temperature measuring technology, conducive to the harsh working environment and remote temperature monitoring applications.…”

“…Luminescent materials have gained extensive application prospects in display lighting, anticounterfeiting, optical information storage, temperature sensing, and other fields on account of their particular optical properties 1–5 . Thereinto, optical temperature sensors via fluorescence intensity ratio (FIR) are rapidly developed, which is not susceptible to external interference in measurement, enriching the temperature measurement technology that holds significant implications on human daily life as well as scientific inquiry 6–9 .…”