A kind of orange-red fluorescent powder and preparation method thereof
A phosphor, orange-red technology, applied in the field of orange-red phosphor and its preparation, can solve the problems of short life, easy aging of packaging materials, difficult preparation of high-efficiency power type UVLED, etc., and achieve the effect of improving color rendering.
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
preparation example Construction
[0044]The present invention also provides a method for preparing the above-mentioned fluorescent powder, comprising: mixing D precursor, R precursor, Ce precursor and Sc precursor, performing high-temperature solid-state reaction to obtain fluorescent powder;
[0045] The molar ratio of D, R, Ce and Sc in the D precursor, R precursor, Ce precursor and Sc precursor is 1: (1-x): x: 1; 0<x<1; the D is at least one of Mg, Ca and Sr, etc., wherein Sr is essential; the R is at least one of La, Y, and Lu, etc., wherein La is essential.
[0046] Wherein, the x, D and R are the same as those described above, and will not be repeated here.
[0047] The D precursor is a compound containing D well known in the art, and there is no special limitation. In the present invention, it is preferably D carbonate, D oxide, D oxalate and D nitrate, etc. At least one of, more preferably, the carbonate of D; the precursor of R is at least one of the carbonate of R, the oxide of R, the oxalate of R a...
Embodiment 1
[0057] The raw material is SrCO 3 (analytical pure), La 2 o 3 (analytical pure), CeO 2 (99.99%) and Sc 2 o 3 (Analytical pure), the molar ratio is 1:0.49:0.02:0.5, the above raw materials are ground and mixed, dried, pressed into tablets under a pressure of 2MPa, put into a crucible, and placed in a high-temperature furnace at 1450°C under an ammonia reducing atmosphere. Sintered for 5h, cooled to room temperature with the furnace, and the theoretical chemical composition was obtained as SrLa 0.98 Ce 0.02 ScO 4 of fluorescent powder.
[0058] Utilize X-ray diffraction to analyze the fluorescent material obtained in embodiment 1, obtain its X-ray diffraction pattern, as figure 1 shown.
[0059] Utilize fluorescence spectrometer to analyze the fluorescent material obtained in embodiment 1, obtain its excitation spectrogram, as figure 2 shown. It can be seen that the excitation band of the fluorescent material mainly falls in the blue light region.
[0060] Utilize f...
Embodiment 2
[0062] The raw material is SrCO 3 (analytical pure), La 2 o 3 (analytical pure), CeO 2 (99.99%) and Sc 2 o 3 (Analytical pure), the molar ratio is 1:0.25:0.5:0.5, the above raw materials are ground and mixed, dried, pressed into tablets under a pressure of 1MPa, put into a crucible, and placed in a high-temperature furnace at 1450°C under an ammonia reducing atmosphere. Sintered for 5h, cooled to room temperature with the furnace, and the theoretical chemical composition was obtained as SrLa 0.5 Ce 0.5 ScO 4 of fluorescent powder.
[0063] Utilize fluorescence spectrometer to analyze the fluorescent material obtained in embodiment 2, obtain its excitation spectrogram, as Figure 4 shown. It can be seen that the excitation band of the phosphor mainly falls in the blue light region.
[0064] Utilize fluorescence spectrometer to analyze the fluorescent material obtained in embodiment 2, obtain its emission spectrogram, as Figure 5 shown. It can be seen that the phosp...
PUM
Login to View More Abstract
Description
Claims
Application Information
Login to View More