Novel Eu<3+> and Mn<2+> co-doped tungstate red fluorescent material and preparation method thereof
A red fluorescence and co-doping technology, applied in the field of red fluorescent materials, can solve problems such as daily application performance limit, achieve good thermal quenching properties and luminous efficiency, simple and easy preparation method, and excellent performance.
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[0033] Example 1
[0034] Weigh the compound raw materials containing calcium (Ca), strontium (Sr) or barium (Ba), tungsten-containing compound raw materials, europium-containing compound raw materials, and manganese-containing compound raw materials as starting materials, according to the element molar ratio R:W :Eu:Mn=(1-xy):1:x:y, accurately weigh the four raw materials respectively, where x is 0.001, 0.002, 0.004, 0.006, 0.008, 0.01, 0.03, 0.06, 0.08, 0.1, y Respectively take 0.001, 0.002, 0.004, 0.006, 0.008, 0.01, 0.03, 0.06, 0.08, 0.1, and R is expressed as calcium (Ca), strontium (Sr) or barium (Ba). ①Weigh four raw materials: calcium carbonate, tungsten oxide, europium oxide, and manganese dioxide respectively, and control the total weight of the mixture to be about 50 grams. After 50 grams of the mixture is uniformly mixed by ball milling, it is put into the corundum crucible, and then the crucible is put into the high temperature electric furnace. Precisely control ...
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[0035] Example 2
[0036] Select calcium (Ca), strontium (Sr) or barium (Ba) oxides, tungsten-containing carbonate, europium carbonate and manganese carbonate as starting materials, according to the element molar ratio R:W:Eu:Mn=(1 -xy):1:x:y, respectively accurately weigh the four raw materials, where 0.001≤x≤0.1 and 0.001≤y≤0.1, and R is expressed as calcium (Ca), strontium (Sr) or barium (Ba). Control the total weight of the mixture to about 50 grams. After 50 grams of the mixture is uniformly mixed by ball milling, it is put into the corundum crucible, and then the crucible is put into the high temperature electric furnace. Accurately control the heating rate, control the decomposition reaction speed of the compound material, and prevent the mixture from overflowing from the crucible. The sample is pre-fired at 500°C for 5 hours in an air atmosphere. Take out the pre-fired sample, grind and mix it again, put it in a crucible, burn it in an air atmosphere at 1150°C for 8 ho...
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[0037] Example 3
[0038] Select calcium (Ca), strontium (Sr) or barium (Ba) nitrate, chloride containing tungsten, europium carbonate and manganese carbonate as starting materials, according to the element molar ratio R:W:Eu:Mn=(1- xy):1:x:y. Weigh the four raw materials accurately respectively, where 0.001≤x≤0.1 and 0.001≤y≤0.1, and R is expressed as calcium (Ca), strontium (Sr) or barium (Ba). Control the total weight of the mixture to about 50 grams. After 50 grams of the mixture is uniformly mixed by ball milling, it is put into the corundum crucible, and then the crucible is put into the high temperature electric furnace. Accurately control the heating rate, control the decomposition reaction speed of the compound material, and prevent the mixture from overflowing from the crucible. The sample is pre-fired at 400°C for 5 hours in an air atmosphere. Take out the pre-fired sample, grind and mix it again, put it in a crucible, burn it in an air atmosphere at 1250°C for 6 ho...
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