Europium-doped yttrium strontium triborate-based red fluorescent powder and preparation method thereof
A technology of fluorescent powder and triboric acid, applied in chemical instruments and methods, luminescent materials, etc., can solve the problems of high color temperature and low color rendering index of red fluorescent powder, and achieve high luminous intensity, good luminous performance, and strong operability Effect
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[0028] Example 1
[0029] According to the chemical formula Sr 3 Y 0.99 (BO 3 ) 3 :The stoichiometric ratio of 0.01Eu, using an electronic balance to accurately weigh SrCO 3 , Y 2 O 3 , H 3 BO 3 , Eu 2 O 3 , The purity of rare earth oxide is 99.99%, and the rest are analytical pure. After grinding and mixing the above raw materials uniformly, put them into a corundum crucible and place them in a rapid heating resistance furnace. In an air atmosphere, the temperature rises to 1200°C at a heating rate of 5°C / min. The temperature is kept for 5 hours, and then cooled with the furnace. To room temperature. Take out the sample and grind it again to get Eu 3+ Doped with yttrium strontium triborate red phosphor.
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[0030] Example 2
[0031] According to the chemical formula Sr 3 Y 0.98 (BO 3 ) 3 :The stoichiometric ratio of 0.02Eu, using an electronic balance to accurately weigh SrCO 3 , Y 2 O 3 , H 3 BO 3 , Eu 2 O 3 , The purity of rare earth oxide is 99.99%, and the rest are analytical pure. After grinding and mixing the above raw materials uniformly, put them into a corundum crucible and place them in a rapid heating resistance furnace. In an air atmosphere, the temperature rises to 1200°C at a heating rate of 8°C / min. The temperature is kept for 5 hours, and then cooled with the furnace. To room temperature. Take out the sample and grind it again to get Eu 3+ Doped with yttrium strontium triborate red phosphor.
Example Embodiment
[0032] Example 3
[0033] According to the chemical formula Sr 3 Y 0.96 (BO 3 ) 3 :Stoichiometric ratio of 0.04Eu, weigh SrCO accurately with an electronic balance 3 , Y 2 O 3 , H 3 BO 3 , Eu 2 O 3 , The purity of rare earth oxide is 99.99%, and the rest are analytical pure. After the above raw materials are ground and mixed uniformly, they are put into a corundum crucible and placed in a rapid heating resistance furnace. In an air atmosphere, the temperature is raised to 1250°C at a heating rate of 10°C / min, and the temperature is kept for 5 hours, and then cooled with the furnace. To room temperature. Take out the sample and grind it again to get Eu 3+ Doped with yttrium strontium triborate red phosphor.
[0034] figure 1 Is the Sr prepared in Example 3 3 Y 0.96 (BO 3 ) 3 :0.04Eu phosphor and Sr 3 Y(BO 3 ) 3 X-ray diffraction pattern of the matrix and Ba 3 Dy(BO 3 ) 3 Comparison chart of standard card (PDF#50-0098). Sr is currently not found in the PDF card library 3 Y(BO 3 ) 3...
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