Mn<4+> activated dark red fluorescent material for plant growth LED (Light Emitting Diode) lamp and preparation method of Mn<4+> activated dark red fluorescent material
A technology of fluorescent materials and LED lamps, applied in the directions of luminescent materials, chemical instruments and methods, light sources, etc., to achieve the effects of good thermal stability, stable chemical properties, and simple preparation process
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Embodiment 1
[0023] According to SrLa 2 sc 1.96 o 7 :0.02Mn 4+ 0.02Mg 2+ The stoichiometric ratio, weigh 1.0334g SrCO 3 , 2.2807gLa 2 o 3 , 0.9268g Sc 2 o 3 and 0.0122g MnO 2 , 0.0056g MgO, mix the weighed material evenly and grind it in an agate mortar for 30 minutes, put the ground powder into a corundum crucible, then put the corundum crucible in a muffle furnace, and heat it in an air atmosphere at 8°C The heating rate per minute was raised to 1000°C for 2 hours, and then the temperature was raised to 1600°C at a heating rate of 12°C / min for 5 hours. 4+ Deep red fluorescent material SrLa for activated plant growth LED lights 2 sc 2 o 7 :0.02Mn 4+ .
[0024] The obtained fluorescent material adopts the Rigaku mini flex 6000 type X-ray powder diffractometer produced by Rigaku Co., Ltd. to carry out phase analysis on the product (test conditions are: CuKα radiation, voltage is 40KV, current is 15mA, and the scanning range is 10 ° ~ 80 ° , the scanning speed is 10° / min, and ...
Embodiment 2
[0026] In this example, the temperature was raised to 1000°C for 2 hours at a heating rate of 7°C / min in an air atmosphere, and then the temperature was raised to 1550°C at a heating rate of 12°C / min for 6 hours, and the other steps were the same as in Example 1 to obtain mn 4+ Deep red fluorescent material SrLa for activated plant growth LED lights 2 sc 2 o 7 :0.02Mn 4+ .
[0027] Depend on Figure 5 It can be seen that the obtained fluorescent materials have excitation peaks at 363 and 514nm respectively in the range of 200-600nm, wherein the excitation peak at 363nm matches the current commercial (near) ultraviolet chip, and the excitation peak at 514nm matches the current commercial green light chip Matching; the fluorescent material can produce deep red fluorescence with a peak at about 690nm under excitation at about 363 and 514nm, and the fluorescence covers the spectral region of 650-750nm; Figure 6 Is deep red phosphor SrLa 2 sc 2 o 7 :Mn 4+ The fluorescenc...
Embodiment 3
[0029] According to SrLa 2 sc 1.94 o 7 :0.03Mn 4+ 0.03Mg 2+ The stoichiometric ratio, weigh 1.0334g SrCO 3 , 2.2807gLa 2 o 3 , 0.9075g Sc 2 o 3 and 0.0182g MnO 2 , 0.0085g MgO, mix the weighed material evenly and grind it in an agate mortar for 30 minutes, put the ground powder into a corundum crucible, then put the corundum crucible in a muffle furnace, and heat it in an air atmosphere at 5°C The heating rate per minute was raised to 1000°C for 2 hours, and then the temperature was raised to 1550°C at a rate of 10°C / min for 6 hours. 4+ Deep red fluorescent material SrLa for activated plant growth LED lights 2 sc 2 o 7 :0.03Mn 4+ .
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