Far-red light fluorescent powder and light-emitting device comprising fluorescent powder
A technology of red fluorescent powder and light-emitting device, which is applied in the direction of light-emitting materials, electrical components, circuits, etc., can solve the problems of poor water resistance, low luminous efficiency, and poor temperature resistance, and achieve broad application fields, high luminous efficiency, and strong The effect of far-red light emission
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Embodiment 1
[0038] The far-red fluorescent powder provided in this embodiment contains a compound formula of 12.6CaO·4.4Al 2 o 3 5ZnO 0.4MnO 2 0.2Na 2 O. According to the stoichiometric ratio of the chemical formula, the oxide raw materials taken symmetrically were ground and mixed to obtain a mixture; the mixture was ground and mixed and then calcined at 1300°C for 5 hours, and the roasted product was obtained after cooling down; the obtained roasted product was After crushing, grinding, grading, sieving and washing, etc., the far-red phosphor intermediate can be obtained.
[0039] Subsequently, the intermediate is coated with tetraethyl orthosilicate in a liquid phase, and the specific process is as follows: first, use alcohol and deionized water, according to the mass ratio of alcohol: deionized water = 1:1, to obtain a mixed solution; then use the above For the mixed solution and the far-red phosphor intermediate, according to the far-red phosphor intermediate: mixed solution = 1:...
Embodiment 21
[0056] The light-emitting device described in Example 21 uses a semiconductor chip with a wavelength of 460nm as the light source, and the light-emitting material is a far-red phosphor, and the chemical formula of the far-red phosphor is 13.8CaO·4.5Al 2 o 3 0.5Ga 2 o 3 · MgO · 5ZnO · 0.2MnO 2 0.1K 2 O, according to the stoichiometric ratio, accurately weigh the oxide raw materials, and grind and mix the obtained oxide raw materials to obtain a mixture; calcinate the mixture at 1300 ° C for 5 hours, and obtain a roasted product after cooling down; obtain the roasted product After crushing, grinding, grading, sieving and washing, the far-red luminescent intermediate is obtained. Subsequently, the intermediate is coated with tetraethyl orthosilicate in a liquid phase, and the specific process is as follows: first, use alcohol and deionized water, according to the mass ratio of alcohol: deionized water = 1:1, to obtain a mixed solution; then use the above For the mixed soluti...
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