A sandwich type titanate fluorescent glass film and its preparation method
A fluorescent glass, sandwich technology, applied in semiconductor devices, electrical components, circuits, etc., can solve the problems of failing to meet the lighting requirements of commonly used medical equipment, the inability of phosphors to drive large currents, and the inability to meet color reducibility. Conducive to industrial expansion of production, optimization of packaged LED structure, good protection effect
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Embodiment 1
[0048] Such as figure 1 As shown in this figure, the carbonate phosphor paste 1 is printed on a φ50 glass plate 1 with a thickness of 0.4mm through a 100-mesh screen. The same operation process is used to obtain the same glass plate 2, and then the manufactured The obtained two glass plate samples were respectively placed in an annealing furnace, raised from room temperature to 200°C in 2 hours, kept at 200°C for 2 hours, then cooled to 50°C, and the annealing furnace was closed, and the two pieces were baked again. The dry glass plate samples were combined and placed in a sintering furnace from room temperature to 600 ° C for 1 h, and kept at 600 ° C for 10 min, and then cooled to room temperature with the furnace to obtain a titanate phosphor layer with a thickness of 20 μm and transparent Sandwich-type titanate fluorescent glass-ceramic film with a rate of more than 90%, its structure is as follows figure 1 shown.
[0049] Wherein, the glass plate of φ50 is super strong g...
Embodiment 2
[0051] In this embodiment, the titanate phosphor paste 1 in the embodiment 1 is replaced with the titanate phosphor paste 2, and the rest is the same as that of the embodiment 1, and will not be repeated here.
[0052] The titanate phosphor paste 2 is composed of: isopropyl titanate: magnesium nitrate: manganous nitrate: barium nitrate: ethylene glycol: citric acid 1: 1.98: 0.1%: 0.02: 20:5 Accurately weighed, then put into a beaker, heated and stirred evenly in a constant magnetic stirring furnace, and then placed in a high-temperature furnace for calcination, and finally the ratio of the prepared fluorescent powder to commercial yellow powder and ink was 1; 1 : 1 mixed, and fully stirred to obtain a slurry. Then, the prepared sandwich-type titanate fluorescent glass film was matched with 3328 blue LED chips for testing, and the luminous efficiency reached 68.9lm / W, the color temperature was 4475 K, and the color rendering index was 72.8.
Embodiment 3
[0054] In this example, the fluorescent powder in Example 2 was mixed with the commercial yellow powder and the ink at a ratio of 1; 1:2, and fully stirred to obtain a slurry. The rest are the same as in Embodiment 2 and will not be repeated. Then, the prepared sandwich titanate glass film was matched with the 3328 blue LED chip for testing, and the luminous efficacy reached 77.45 lm / W, the color temperature was 4200K, and the color rendering index was 71.
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