Potassium barium terbium borate compound, potassium barium terbium borate green fluorescent powder and preparation method thereof
A technology of green phosphor and potassium borate is applied in the field of potassium, barium and terbium borate compounds, which can solve the problems of low light efficiency, poor color rendering, poor luminous uniformity, etc., and achieves simple preparation process, low cost, and easy control of experimental conditions. Effect
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Embodiment 1
[0028] According to the chemical formula KBaTb(B 3 o 6 ) 2 The corresponding proportion of each element in weighs 0.691g of K 2 CO 3 0.691g (0.005mol); 1.973g of BaCO 3 (0.010 mol); 1.869 g of Tb 4 o 7 (0.0025mol); 3.821g of H 3 BO 3 (0.0618mol); After grinding and mixing evenly, put it into an alumina ceramic crucible, then put the alumina ceramic crucible into a muffle furnace, heat up to 550°C at a heating rate of 50°C / h, sinter for 30h, cool to room temperature with the furnace, and take out Grind into powder; heat up to 850°C at 100°C / h again, sinter for 100h, take out and grind for 3 times in the middle, and then obtain the potassium barium terbium borate green fluorescent powder product of this embodiment; the powder X-ray diffraction pattern of this product is as follows figure 1 , the diffraction pattern was not found in the database, indicating that KBaTb(B 3 o 6 ) 2 is a new compound; figure 2 It is the excitation spectrum of potassium barium terbium bo...
Embodiment 2
[0030] According to the chemical formula KBaTb(B 3 o 6 ) 2 The corresponding ratio of each element in the weighed 1.011g of KNO 3 (0.010mol); 2.613g of Ba(NO 3 ) 2 (0.010 mol); 1.869 g of Tb 4 o 7 (0.0025mol); 3.893g of H 3 BO 3 (0.0630mol); After grinding and mixing evenly, put it into an alumina ceramic crucible, then put the alumina ceramic crucible into a muffle furnace, heat up to 450°C at a heating rate of 20°C / h, sinter for 10h, cool to room temperature with the furnace, and take out Grind into powder; heat up to 750°C at 50°C / h again, sinter for 72h, take out and grind twice in the middle, and then obtain the potassium barium terbium borate green fluorescent powder product of this embodiment; its powder X-ray diffraction pattern, luminescence performance and implementation Example 1 is similar.
Embodiment 3
[0032] According to the chemical formula KBaTb(B 3 o 6 ) 2 The corresponding ratio of each element in the weighed 1.011g of KNO 3 (0.010mol); 1.973g of BaCO 3 (0.010 mol); 1.869 g of Tb 4 o 7 (0.0025mol); 3.821g of H 3 BO 3 (0.0618mol); After grinding and mixing evenly, put it into an alumina ceramic crucible, then put the alumina ceramic crucible into a muffle furnace, raise the temperature to 600°C at a heating rate of 100°C / h, sinter for 48h, cool to room temperature with the furnace, and take out Grind to powder. Slowly raise the temperature to 900°C at 150°C / h again, sinter for 120h, take out and grind twice in the middle, and then obtain the potassium barium terbium borate green fluorescent powder product of this example; its powder X-ray diffraction pattern and luminescent performance are similar to those of Example 1 .
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