Fluorescent material with molybdate and tungstate as matrixes as well as preparation method and application thereof
A fluorescent material, molybdenum tungstate technology, applied in the direction of luminescent materials, chemical instruments and methods, the use of gas discharge lamps, etc., can solve the problems of cumbersome production process, complex chemical composition, etc. High, simple method and effective effect
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[0028] Example 1
[0029] (1) According to 0.1Eu 3+ :Na 5 Y 0.9 (WO 4 ) 2 (MoO 4 ) 2 The molar ratio expressed by the chemical formula uses electronic balance to weigh Na 2 MoO 4 ·2H 2 O, WO 3 , Y 2 O 3 , MoO 3 , Na 2 CO 3 , Eu 2 O 3 The raw materials (the purity of each chemical component is above 99.99%), the compounding is carried out according to the following reaction formula:
[0030] 2Na 2 CO 3 + 3Na 2 MoO 4 ·2H 2 O +4WO 3 +0.1Eu 2 O 3 +0.9Y 2 O 3 + MoO 3
[0031] →2Eu 3+ :Na 5 Y 0.9 (WO 4 ) 2 (MoO 4 ) 2 +2CO 2 ↑+6H 2 O
[0032] (2) Grind the above weighed raw materials in a corundum mortar for more than half an hour until they are evenly mixed, then put them into a platinum crucible and place them in a high-temperature heating furnace for heating, and use a temperature controller to set the heating program. The heating temperature program is to increase the temperature from room temperature to 600°C at a temperature rise rate of about 70°C / hour, sinter at this temperature fo...
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[0034] Example 2
[0035] (1) According to 0.5Eu 3+ :Na 5 Y 0.5 (WO 4 ) 2 (MoO 4 ) 2 The molar ratio expressed by the chemical formula uses electronic balance to weigh Na 2 MoO 4 ·2H 2 O, WO 3 , Y 2 O 3 , MoO 3 , Na 2 CO 3 , Eu 2 O 3 The raw materials of, use the similar reaction formula as in Example 1 to carry out
[0036] (2) Put the above weighed raw materials in a corundum mortar, after grinding, uniformly mixing, loading into a crucible, and heating in a high-temperature heating furnace in accordance with the similar processes in Example 1. Set the temperature rising program with a temperature controller. The heating temperature program is to increase from room temperature to 630°C at a temperature rise rate of 75°C / hour, sinter at this temperature for 7 hours, and then cool down to 190°C at a rate of about 65°C / hour, and then start to stop the heating equipment , And finally let the material cool to room temperature and take it out.
[0037] (3) Grind the taken-out sample in...
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[0038] Example 3
[0039] (1) According to 0.8Eu 3+ :Na 5 Y 0.2 (WO 4 ) 2 (MoO 4 ) 2 The molar ratio expressed by the chemical formula uses electronic balance to weigh Na 2 MoO 4 ·2H 2 O, WO 3 , Y 2 O 3 , MoO 3 , Na 2 CO 3 , Eu 2 O 3 The raw materials and the batching method are similar to those in Example 1 and Example 2.
[0040] (2) The processing steps and methods of the weighed raw materials are the same as in Example 1 and Example 2. The heating temperature program is to increase to 650°C at a temperature rising rate of about 80°C / hour, and sinter at this temperature for 8 hours. After cooling down to 200°C at a cooling rate of 70°C / hour, stop the heating equipment, and finally let the material cool to room temperature before taking it out.
[0041] (3) Grind the taken-out sample in a corundum mortar again, and then put the sample in a 250-mesh sieve for sieving to obtain europium-doped yttrium sodium tetramolybdate tungstate red phosphor material.
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