Praseodymium doped borate red luminescent material and preparation method and applications thereof
A red luminescent, borate technology, applied in luminescent materials, chemical instruments and methods, sustainable manufacturing/processing, etc., can solve problems such as high control difficulty, fluorescence emission reabsorption, and reduced luminous efficiency, and achieve physical and chemical properties. Stable, high-efficiency red light luminous efficiency, stable physical and chemical properties
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example 1
[0024] Example 1: According to ARB 7 o 13 : Pr 3+ (A is one or a combination of Mg, Ca, Sr, Ba, Cu, Zn, etc.; R = one or a combination of Al, Sc, La, Gd, Y, Bi, etc.) The stoichiometric ratio is used for batching, and the raw material containing A is ACO 3 、ANO 3 or A(COOH) 2 One or more of them, the raw material containing R is R 2 o 3 , R 2 (NO 3 ) 3 or R 2 (CO 3 ) 3 One or more of them, Pr 3+ The raw material is Pr 6 o 11 or Pr 2 (CO 3 ) 3 One or more, H 3 BO 3 The stoichiometric excess of the raw materials is 3-20%, and the required raw materials are fully dried in an oven, and the corresponding raw materials are weighed according to the molar ratio in the molecular formula; the weighed raw materials are placed in an agate mortar for grinding, and the raw materials are Grind and mix evenly; then put the obtained mixture in a muffle furnace, and burn it for the first time at 200°C for 0.5-2 hours. After cooling, grind and pulverize the obtained material ...
example 2
[0025] Example 2: the raw material MgCO 3 、H 3 BO 3 、Al 2 o 3 and Pr 6 o 11 Place them in an oven at 200°C for more than 3 hours to remove moisture from the raw materials. Then the above raw materials were pressed by Pr 3+ MgAlB with a doping concentration of 4.0 at.% 7 o 13 The ratio of crystals requires weighing, where H 3 BO 3 According to the excess of 3-20% in the stoichiometric ratio, the prepared raw materials are fully mixed on the drum mixer, and then the oil pressure is 4 tons / cm 2 The pressure is pressed into a sheet of φ50mm. Put the thin slice in a furnace at 600-700°C for 5 hours at a constant temperature, then grind and press the sheet, put the thin skin in a furnace at 900-1500°C for sintering again, until the sintered material is identified by X-ray phase analysis. PR 3+ Doped MgAlB 7 o 13 Single crystal powder, the crystal belongs to the monoclinic system, and the unit cell parameters are α=γ=90°, β=91.51°.
[0026] Under the excitation of...
example 3
[0027] Example 3: Raw material MgCO 3 、H 3 BO 3 、Al 2 (CO 3 ) 3 、Pr 6 o 11 、HNO 3 Both NaOH and NaOH were purchased analytically pure samples without further purification. MgCO 3 、Al 2 (CO 3 ) 3 and Pr 6 o 11 Raw material by Pr 3+ MgAlB with a doping concentration of 4.0 at.% 7 o 13 The ratio of the crystals is required to be weighed, while the HNO 3 Heating, while dissolving the weighed raw materials into it, completely dissolving the excess HNO 3 Distilled off, and then the obtained product was dissolved in deionized water; press Pr 3+ MgAlB with a doping concentration of 4.0 at.% 7 o 13 Crystal weighed H 3 BO 3 , dissolved in deionized water while stirring, and then slowly added the solution to the previously obtained mixture, while adding an appropriate amount of HNO 3 or NaOH to adjust the pH value of the mixture to 7, and at the same time, stir the solution with a magnetic bar to obtain a solution containing a certain amount of precipitate; then po...
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