Continuous and dynamic reduction device and method of fluorescent powder
A fluorescent powder and dynamic technology, applied in chemical instruments and methods, luminescent materials, etc., can solve the problems of uneven distribution of temperature and reducing gas, inability to meet the requirements of phosphor powder preparation, and slow temperature rise and fall, so as to facilitate mass transfer and heat transfer, fast heating and cooling speed, sufficient and uniform contact
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[0040] Example 1
[0041] Use vacuum environment to burn 20kgBa 0.93 MgAl 10 O 17 :Eu 2+ 0.07 Blue phosphor. Before the operation starts, such as figure 1 , figure 2 with image 3 The various devices and valves shown are all closed. The steps are as follows:
[0042] 1. According to the stoichiometric ratio, weigh the corresponding weight of BaCO 3 , MgO, Al 2 O 3 And Eu 2 O 3 , Ball mill for 48 hours to mix evenly;
[0043] 2. Open valve 2 a Add 10kg, then close valve 2 a ;
[0044] 3. Open valve 4 a , 6 a And 10 a ; Start the vacuuming equipment 5, so that the internal pressure of the feeding device 1, the furnace body 9 and the quenching device 11 is reduced to -3Pa, and then the valve 4 is closed a ;
[0045] 4. Start the transmission equipment of the rotary kiln type reaction vessel 8 a , The inclination angle of the rotary kiln-type reaction vessel to the ground is 1°, and the rotation speed is 1.1 revolutions per minute;
[0046] 5. Turn on the circulating cooling water outsid...
Example Embodiment
[0053] Example 2
[0054] Use vacuum environment to burn 20kgBa 0.93 MgAl 10 O 17 :Eu 2+ 0.07 Blue phosphor. The manufacturing steps 1-7 and 9-11 are similar to the embodiment 1, except that the empty container 24 is placed in step 8, and the quenching medium is a vacuum environment at this time, and embodiment 2 is obtained.
Example Embodiment
[0055] Example 3
[0056] Use 75% H 2 H 2 And N 2 Mixed atmosphere firing 20kgCe 0.69 MgAl 11 O 19 :Tb 3+ 0.31 Green phosphor, and when the exhaust gas after use needs to be purified and recycled, before the operation starts, such as figure 1 , figure 2 with image 3 The various devices and valves shown are all closed. The steps are as follows:
[0057] 1. According to the stoichiometric ratio, weigh the corresponding weight of CeO 2 , MgO, Al 2 O 3 And Tb 4 O 7 , Ball mill for 48 hours to mix evenly;
[0058] 2. Open valve 2 a Add 10kg, then close valve 2 a ;
[0059] 3. Open valve 4 a , 6 a And 10 a ; Start the vacuuming equipment 5, so that the internal pressure of the feeding device 1, the furnace body 9 and the quenching device 11 is reduced to -3Pa, and then the valve 4 is closed a And 6 a ; Open valve 12 a , The prepared containing 75% H 2 H 2 And N 2 Mix the gas so that the internal pressure of the furnace body 9 and the quenching device 11 is 1.05 atmospheres; open the valv...
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