Fluorescent powder as well as preparation method and application thereof
A fluorescent powder and fluorescent glass technology, applied in chemical instruments and methods, luminescent materials, semiconductor devices, etc., can solve the problems of low phosphor quantity, reduced luminous intensity, and insufficient luminous intensity, and achieve high luminous intensity and wide luminous spectrum , good thermal stability
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Embodiment 1
[0069] A method for preparing fluorescent glass, comprising the following steps:
[0070] S1. Mix tellurium oxide, zinc oxide, sodium carbonate, boric acid, and aluminum oxide in a molar ratio of 55:16:13:14:2, and put them in a mortar and grind them evenly.
[0071] S2. Pretreatment and roasting of precursors: put the ground raw materials into a box furnace that has been heated to 800 ° C for 30 minutes, let the raw materials fully melt to form glass liquid, pour out the glass liquid into the copper mold and cool to room temperature, Collect and grind into glass precursor powder for use.
[0072] S3. Intermediate treatment, calcined glass-ceramic: Weigh the glass precursor powder and the phosphor LaZn according to the mass ratio of phosphor powder: glass precursor powder = 1:10 0.2 Mn 0.8 Al 11 O 19 , fully grind and mix evenly, put it into a furnace at 570 °C for 20 minutes, melt it to form a glass liquid, and pour it onto a graphite mold at 230 °C to shape.
[0073] S4...
Embodiment 2- Embodiment 10
[0078] Example 2-Example 10 Prepare fluorescent glass and fluorescent powder by the method of Example 1, weigh each component according to the dosage in Table 1, adjust the temperature and time according to the parameters in Table 1, tellurium oxide and zinc oxide in Table 1 , sodium carbonate, boric acid, alumina corresponding values are the molar ratios between them.
[0079] Table 1
[0080]
[0081] Example 2-Example 10, through melt quenching, the glass-ceramic is directly obtained.
[0082] figure 2 The XRD patterns of the fluorescent glass and fluorescent powder prepared in Example 1 and the corresponding PDF cards.
[0083] The fluorescent glass sample prepared in Example 1 was surface polished (sample thickness 1.0 mm), image 3 The glass composition uniformity was analyzed by M4 X-ray fluorescence spectrometer (XRF). As shown in the figure, the elements of the near-infrared fluorescent glass were evenly distributed, which was beneficial to the uniformity of ...
Embodiment 11- Embodiment 13
[0091] Example 11-Example 13 The fluorescent glass and phosphor powder were prepared by the method of Example 1. When lanthanum oxide, the raw material for preparing the phosphor powder in Example 1, was replaced with gadolinium oxide, lutetium oxide and samarium oxide in turn, see the table for details. 2. The numerical values of the raw materials in Table 2 are the molar ratios between them.
[0092] Table 2
[0093] raw material Example 1 Example 11 Example 12 Example 13 Lanthanum oxide 1 0 0 0 Gadolinium oxide 0 1 0 0 Lutetium oxide 0 0 1 0 Samarium oxide 0 0 0 1 Zinc oxide 0.4 0.4 0.4 0.4 manganese carbonate 1.6 1.6 1.6 1.6 Alumina 11 11 11 11
[0094] Figure 9 The excitation and emission spectra of the phosphors prepared in Example 1 and Examples 11-13 are shown. It can be seen that the phosphors prepared in Example 1 and Examples 11-13 have the same emission wavelength, but the flu...
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