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Phosphor and preparation method

A technology of phosphors and compounds, applied in the field of luminescent materials, can solve the problems of orange luminous color and low color purity, and achieve the effects of high color purity, low light decay, and easy operation.

Inactive Publication Date: 2013-05-08
OCEANS KING LIGHTING SCI&TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, for the red phosphor (Y, Gd)BO 3 :Eu 3+ Speaking, because Eu 3+ In a strictly symmetrical lattice, its main emission peak is located at 593nm, corresponding to Eu 3+ The characteristic transition 5 D. 0 → 7 f 1 , but the luminous color is orange, and the color purity is far lower than the NTSC standard

Method used

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Experimental program
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Embodiment 1

[0032] The composition of embodiment 1 is Gd 1.95 Eu 0.05 P 4 o 13 red phosphor

[0033] Weigh gadolinium oxide Gd 2 o 3 0.7069g, europium oxide Eu2 o 3 0.0176g and diammonium hydrogen phosphate (NH 4 ) 2 HPO 4 1.3734g (the quality of diammonium hydrogen phosphate is according to Gd 1.95 Eu 0.05 P 4 o 13 The molar equivalent of the P element in the element is calculated by 30% excess, and the calculation methods in the following examples are all the same as this example). Put the above raw materials into an agate mortar and thoroughly grind them, put them into a corundum crucible and pre-sinter them at 300°C for 5 hours, then cool them down to room temperature naturally, take them out and grind them thoroughly again. Finally, the reground product was calcined at 1000°C for 8 hours, cooled to room temperature naturally, and white powder Gd was obtained after taking out and grinding 1.95 Eu 0.05 P 4 o 13 of red phosphor.

[0034] figure 1 is the Gd of Examp...

Embodiment 2

[0035] The composition of embodiment 2 is Y 1.95 Eu 0.05 P 4 o 13 red phosphor

[0036] Weigh yttrium oxide Y 2 o 3 0.4403g, europium oxide Eu 2 o 3 0.0176g and diammonium hydrogen phosphate (NH 4 ) 2 HPO 4 1.3734 g (30% excess). Put the above raw materials into an agate mortar and thoroughly grind them, put them into a corundum crucible and pre-sinter them at 300°C for 5 hours, then cool them down to room temperature naturally, take them out and grind them thoroughly again. Finally, the reground product was calcined at 1050°C for 8 hours, cooled to room temperature naturally, and white powder Y was obtained after taking out and grinding. 1.95 Eu 0.05 P 4 o 13 red phosphor.

[0037] image 3 is Y of Example 2 of the present invention 1.95 Eu 0.05 P 4 o 13 X-ray diffraction pattern (XRD) and Y of red phosphor powder 2 P 4 o 13 Comparison chart of standard card NO: 35-0079. According to the rules of crystallization chemistry, ions with similar ionic ra...

Embodiment 3

[0039] The composition of embodiment 3 is La 1.95 Eu 0.05 P 4 o 13 red phosphor

[0040] Weigh lanthanum oxide La 2 o 3 0.6353g, europium oxide Eu 2 o 3 0.0176g and diammonium hydrogen phosphate (NH 4 ) 2 HPO 4 1.3734 g (30% excess). Put the above raw materials into an agate mortar and thoroughly grind them, put them into a corundum crucible and pre-sinter them at 300°C for 5 hours, then cool them down to room temperature naturally, take them out and grind them thoroughly again. Finally, the re-ground product was calcined at 1050°C for 8 hours, cooled to room temperature naturally, taken out and ground to obtain a white powder La 1.95 Eu 0.05 P 4 o 13 red phosphor.

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Abstract

The invention discloses a phosphor and a preparation method. The chemical formula of the phosphor is Re<,><2-x>Re<,,><x>P<4>O<13>, wherein Re<,> is at least one of Y, La and Gd, Re<,,> is one or two from the group of Eu, Tb, Dy, Tm, Sm, Er and Ce, the value range of x is larger than zero and less than or equal to 0.50. The preparation method of the phosphor is that: fully grinding raw materials which are collected in proportion, carrying out a low temperature presintering treatment on the materials, grinding the materials again, calcining the materials at a temperature of 900-1350 DEG C for 4to 25 hours, and cooling the materials to obtain phosphor. The preparation method in the invention has a simple process, low cost, and is suitable for industrialization production. The produced phosphor has the advantages of short afterglow time, low light decay, good stability, high purity and the like, and can be widely applied to the display lighting field.

Description

technical field [0001] The invention relates to the technical field of luminescent materials, in particular to a fluorescent powder excited by vacuum ultraviolet light and a preparation method thereof. Background technique [0002] In traditional lighting and display fields, low-pressure mercury vapor discharges are commonly used as excitation light sources for commonly used phosphors. However, not only mercury vapor is poisonous, it will affect the health of the human body after inhalation, and even threaten human life, and the pollution of mercury to the soil is irreversible. In recent years, with the in-depth research on rare earth phosphors excited by the vacuum ultraviolet band, people have used the excimer discharge (172nm or 147nm) of the rare gas Xe as an excitation light source in flat panel display technology (PDP), thus overcoming the mercury vapor as an excitation source. The disadvantages caused by exciting light sources will not cause harm to the environment a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/81
Inventor 周明杰刘军廖秋荣梁小芳田梓峰
Owner OCEANS KING LIGHTING SCI&TECH CO LTD
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