| Summary: | 碩士 === 明新科技大學 === 化學工程與材料科技系碩士班 === 106 === In this paper, carbonates are used as the main lattice materials, and the activation centers are respectively doped: Tb3+, Gd3+, Ce3+, and the red, green and blue light-emitting bands are obtained. The process is a solid phase synthesis and solid phase. The wet method in the synthesis was carried out at a heating rate of 10 ° C /min to 1000 ° C, 1200 ° C, 1400 ° C, and 1500 ° C for 6 hours to complete the preparation of the phosphor powder. The purity and crystal structure of the sample was mainly analyzed by X-ray diffraction (XRD), and the excitation and emission characteristics of the phosphor were analyzed by photoluminescence (PL). From the results of X-ray powder diffraction instrument, the solid phase synthesis samples CaCO3SiO2: Gd3+, SrCO3SiO2: Tb3+, SrCO3SiO2: Ce3+, SrCO3SiO2: Tb3+, Ce3+, YAG: Ce fluorescent powder can be used in the atmosphere at 1400 °C. The best crystallinity is obtained. From the results of the fluorescence spectrometer, it was found that the main wavelength of the emission spectrum of the sample CaCO3SiO2:Gd3+ excited at a wavelength of 300 nm was 652 nm, and the emission range of 620 nm to 700 nm was the red light. The sample SrCO3SiO2: Tb3+-1000 ° C was excited at a wavelength of 250 nm, and the dominant wavelength of the emission spectrum was 544 nm, and the emission range was 530 nm to 560 nm, which was the green light. The sample SrCO3SiO2: Tb3+-1400° C. The main wavelength of the emission spectrum obtained by excitation at a wavelength of 350 nm is 409 nm, and the emission range of 380 nm to 480 nm is blue light. The sample SrCO3SiO2:Ce3+-1400° C. The main wavelength of the emission spectrum obtained by excitation with a wavelength of 350 nm is 408 nm, and the emission range of 380 nm to 480 nm is blue light. The sample SrCO3SiO2: Tb3+, Ce3+-1400°C, the main wavelength of the emission spectrum obtained by excitation at a wavelength of 350 nm is 406 nm, and the emission range of 380 nm to 480 nm is blue light. The three kinds of samples (SrCO3SiO2: Tb3+, SrCO3SiO2: Ce3+, SrCO3SiO2: Tb3+, Ce3+) emitting blue light have nonlinear optical phenomena at 1400 °C.
Keywords: fluorescent powder, XRD, carbonate, nonlinear optics
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