Yellow-green fluorescent powder
A technology of yellow-green fluorescent powder and rare earth metals, which is applied in the field of yellow-green fluorescent powder and its production, can solve problems such as shortage, and achieve the effects of convenient manufacturing process, low and simple manufacturing cost, and easy availability of varieties
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[0038] The methods used in the prior art for the preparation of phosphors include: high-temperature solid-state reaction method, co-precipitation method to prepare precursors, sol-gel method and combustion method.
[0039] The high-temperature solid-state reaction method is a reaction method in which solid particles are mixed and sintered at a temperature below the melting point. In the solid state sintering process of the unit system, except for the bonding between powder particles, densification and the structure change of pure metal, there is no dissolution between the structures, and no new composition or new phase appears. Within the range of temperature control, the high-temperature solid-state reaction method is stable, easy to operate, and requires fewer conditions for the reaction. However, during the implementation of the high-temperature solid-state reaction method, if the particle size of the participating substances is large, there will be a phenomenon of componen...
Embodiment 1
[0059] A kind of fluorescent powder, its chemical formula is: Bi 1-x Ca 3 (PO 4 ) 3 O:xTb 3+ , where x=0.01. Above Phosphor Bi 0.99 Ca 3 (PO 4 ) 3 O:0.01Tb 3+ The preparation method:
[0060] Weigh CaCO 3 : 3g, Bi 2 o 3 : 2.31g, Tb 2 o 3 : 0.0373g, NH 4 h 2 PO 4 : 3.451g. Put the above compound into a quartz mortar and crush it by means of grinding and mixing evenly, then transfer it to a crucible or other heating reaction device and place it in a muffle furnace, and pre-sinter it at 350°C in an air atmosphere, and the sintering time is 10h , after natural cooling, take it out from the crucible or other heating reaction device; smash it again and mix it evenly, transfer it to the crucible or other heating reaction device and put it into a muffle furnace, and sinter at 1400 ° C for 2 hours under air atmosphere to obtain the solid After natural cooling and grinding, it becomes yellow-green phosphor Bi 0.99 Ca 3 (PO 4 ) 3 O:0.01Tb 3+ .
Embodiment 2
[0062] A kind of fluorescent powder, its chemical formula is: Bi 1-x Ca 3 (PO 4 ) 3 O:xTb 3+ , where x=0.03. Above Phosphor Bi 0.97 Ca 3 (PO 4 ) 3 O:0.03Tb 3+ The preparation method:
[0063] Weigh CaCO 3 : 3g, Bi 2 o 3 : 2.26g, Tb 2 o 3 : 0.112g, NH 4 h 2 PO 4 : 3.451g. Put the above compound into a quartz mortar and crush it by grinding and mixing evenly, then transfer it to a crucible or other heating reaction device and place it in a muffle furnace, and pre-sinter at 500°C in an air atmosphere for 5 hours. , after natural cooling, take it out from the crucible or other heating reaction device; crush it again and mix it evenly, transfer it to the crucible or other heating reaction device and put it in a muffle furnace, and sinter it at 1100°C for 10h under the condition of air atmosphere to obtain the solid After natural cooling and grinding, it becomes yellow-green phosphor Bi 0.97 Ca 3 (PO 4 ) 3 O:0.03Tb 3+ .
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