Abstract
Calcium monoaluminate, dialuminate, and hexaaluminate and luminophores based on them activated by europium (III) ions were obtained by the citrate-nitrate gel method. X-ray diffraction (XRD) and Full-Profile Rietveld refinement were used to establish the parameters of single-phase systems, to analyze the structure of the investigated compounds, and to determine the most probable sites of calcium substitution by the activator. The interpretation of the emission spectra has shown that europium occupies two crystallographic positions in calcium monoaluminate, while in dialuminate and hexaaluminate europium has only one crystallographic environment. Phosphor emission bands lie in the range from 580 to 720 nm, but the splitting of bands and their intensity are different. This is due to the different symmetry of the europium environment in the aluminate matrixes. This makes it possible to obtain phosphors of different hues of luminescence from the same starting materials, which is confirmed by the Commission Internationale de L'Eclairage (CIE) chromatic coordinate diagram.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
