Borofluoride white light emitting material and preparation method thereof
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A luminescent material, fluoroborate technology, applied in luminescent materials, chemical instruments and methods, climate sustainability, etc., can solve the problems of heavy metal mercury pollution of mercury-containing fluorescent lamps, achieve low price, large output, and simple preparation method Effect
Inactive Publication Date: 2011-08-03
OCEANS KING LIGHTING SCI&TECH CO LTD +1
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[0004] The technical problem to be solved by the present invention is to provide a fluoroborate white light luminescent material capable of emitting white light under mercury-free excitation conditions and its preparation method, so as to solve the problems of heavy metal mercury pollution in mercury-containing fluorescent lamps in the prior art
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Embodiment 1
[0027] Embodiment 1: composition is Ca 4.98 (BO 3 ) 3 F: Dy 0.01 , Na 0.01 White phosphor
[0028] Weigh calcium carbonate (CaCO 3 ) 0.9969 g, sodium carbonate (Na 2 CO 3 ) 0.0011 g, boric acid (H 3 BO 3 ) 0.3710 g, dysprosium oxide (Dy 2 o 3 ) 0.0037 g, ammonium fluoride (NH 4 F) 0.0889 g, fully ground in an agate mortar and mixed evenly, sintered at 700° C. for 12 hours, took out the sample and ground it, and finally obtained the product.
Embodiment 2
[0029] Embodiment 2: composition is Sr 4.98 (BO 3 ) 3 F: Dy 0.01 , K 0.01 White phosphor
[0030] Weigh strontium carbonate (SrCO 3 ) 1.4704 g, potassium carbonate (K 2 CO 3 ) 0.0014 grams, boron trioxide (B 2 o 3 ) 0.2088 g, dysprosium oxide (Dy 2 o 3 ) 0.0037 g, ammonium fluoride (NH 4 F) 0.0889 g, fully ground in an agate mortar and mixed evenly, sintered at 500° C. for 24 hours, took out the sample and ground it, and finally obtained the product.
Embodiment 3
[0031] Embodiment 3: composition is Sr 4.6 (BO 3 ) 3 F: Dy 0.2 , Na 0.2 White phosphor
[0032] Weigh strontium nitrate (Sr(NO 3 ) 2) 1.9470 g, sodium carbonate (Na 2 CO 3 ) 0.0223 g, boric acid (H 3 BO 3 ) 0.3710 g, dysprosium oxide (Dy 2 o 3 ) 0.0746 g, ammonium fluoride (NH 4 F) 0.0889 g, fully ground in an agate mortar and mixed evenly, sintered at 900° C. for 6 hours, took out the sample and ground it, and finally obtained the product.
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Abstract
The invention relates to a borofluoride white light emitting material. The chemical composition formula of the borofluoride white light emitting material is M5-2x(BO3)5F:Dyx, Rx; and M is alkaline earth metal ions, Dy is trivalent activated ions, R is alkali metal ions, the molar percentage content of the Dy relative to the alkali metal ion R is x, and the x is more than or equal to 0.01 and less than or equal to 0.2. Moreover, the invention also relates to a method for preparing the material. The method comprises the following steps of: 1, selecting a source compound of the alkaline earth metal ions, a source compound of borate radical ions, a source compound of the alkali metal ions, a source compound of dysprosium ions and a source compound of fluorine according to a stoichiometric ratio, wherein the stoichiometric ratio of the source compounds is a molar ratio of corresponding elements in the M5-2x(BO3)5F:Dyx, Rx, the x is the molar percentage content of the dysprosium ions relative to the alkali metal ion R, and the x is more than or equal to 0.01 and less than or equal to 0.2; 2, grinding and mixing the source compounds; and 3, sintering the mixture in a high-temperature furnace, and then cooling and grinding to obtain the borofluoride white light emitting material.
Description
technical field [0001] The invention relates to a white light luminescent material manufacturing technology, in particular to a fluoroborate white light luminescent material for a mercury-free fluorescent lamp and a preparation method thereof. Background technique [0002] Mercury in fluorescent lamps and cold-cathode fluorescent lamps is a volatile liquid heavy metal that is harmful to the environment. The production and disposal of fluorescent lamps will cause environmental pollution. On February 13, 2003, the EU's "Official Gazette" L37 published the "Instructions on Prohibiting the Use of Certain Hazardous Substances in Electrical and Electronic Equipment" jointly approved by the European Parliament and the EU Council of Ministers, requiring that since July 2006 On the 1st, the EU market banned the sale of electronic and electrical equipment containing six harmful substances from mercury lamps. [0003] Therefore, the development of mercury-free lighting is the current ...
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