Morphology and spectral characteristics of a luminous fiber containing a rare earth strontium aluminate

Abstract

The long afterglow strontium aluminate phosphor SrAl2O4: Eu2+, Dy3+ was prepared by a solid-state reaction method. The luminous fiber was prepared by melt spinning mixturing this complex and polyethylene terephthalate. The morphology and optical properties of the products had been characterized. Scanning electron microscope photographs indicated that rare earth aluminate salts were distributed on the fiber surface. X-ray diffraction diffusion data revealed that the crystal lattice of the polymer had not been significantly affected by the presence of the phosphor. The excitation spectrum showed broad bands in the ultraviolet and visible regions, and emission spectrum of the luminous fiber was shown to be red-shifted with a peak at 550 nm compared with that of the phosphor at 520 nm. The afterglow intensity of the luminous fiber decayed over an extended period, following an initial sharp reduction. The chromaticity diagram revealed a significant difference in the intensity of the luminous fiber and the phosphor, but only a minor color difference between them. The breaking strength and elongation of the luminous fiber were slightly below those of a normal polyester fiber.

Developments in Eu+2‐Doped Strontium Aluminate and Polymer/Strontium Aluminate Composite

“…The authors studied the morphology and particle distribution on these composites with the help of SEM and TEM. 32,58 The long afterglow strontium aluminate phosphor (SrAl 2 O 4 :Eu 2+ ,Dy 3+ ) encapsulated with poly(ethylene) were also reported by Lin et al 59 The SrAl 2 O 4 :Eu 2+ ,Dy 3+ phosphors are prepared by the combustion method at a temperature of 600°C. In LDPE composites, the phosphor particles appears to be as small and large particles (lumps) and the PMMA composites show leaflet-like structures.…”

“…25,31,32 Kim et al prepared europium-doped Sr 4 Al 2 O 7 phosphor by the solid-state reaction. This method requires high calcination temperature (approximately 1600°C) and additives such as boric acid H 3 BO 3 as a flux to obtain a single-phase product.…”

A Heat-Stimulated Luminous Fiber Using Heat-Sensitive Green TF-G Pigment

“…A number of luminous fibers with different luminescence colors have been fabricated over the years. For example, a luminous fiber with white light can be fabricated using SZSO, SAO, and YOS by adjusting their ratios [6,7,8,9,10]. A luminous fiber with polychromatic light has many applications in sensors and optical devices [11,12].…”

Development and characterization of the amidoxime/Europium (ІІІ)-chelated complex fibers

“…The rare earth ions such as Sm (III), Eu (III), Tb (III), Dy (III) possess good fluorescence properties due to their special structural characteristics [1][2][3][4]. Chelating the amidoxime fibers with rare earth ions can produce amidoxime/Europium (ІІІ)-chelated complex (AECC) fibers which have excellent light-emitting intensity, good mechanical properties, and can free from harmful radiation [5,6]. They can absorb ultraviolet or visible light for ten minutes, and then can emit light continually for more than ten hours after removal of excitation resource [7,8].…”

“…They can absorb ultraviolet or visible light for ten minutes, and then can emit light continually for more than ten hours after removal of excitation resource [7,8]. Such functional fibers can be used for technical textiles such as decorations, protections and medical textiles etc [5,[9][10][11]. However, few studies have been found about using chelating reaction method to fabricate AECC fibers.…”