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Doping zirconium calcium phosphate fluorescent material and preparing method thereof

A technology of zirconium calcium phosphate series and fluorescent materials, which is applied in the field of fluorescent materials, can solve the problems of low luminous efficiency of fluorescent powder, high cost of raw materials of fluorescent powder, and high price, and achieve the goals of easy availability of raw materials, low cost, and pollution prevention Effect

Inactive Publication Date: 2012-04-11
SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the blue and green phosphors still use non-rare earth phosphors, which makes the luminous efficiency of these phosphors relatively low, and the cost of raw materials for rare earth-based phosphors is high, so it is necessary to develop a new type of high-efficiency green phosphor Powder, not only has a lower cost, but also has good luminous performance; at the same time, in medical X-ray photography, in order to convert X-ray images into visual images, an intensifying screen is required
There are also a variety of green light intensifying screens excited by X-rays, among which the high sensitivity intensifying screen uses Gd 2 o 2 S:Tb 3+ , GdTaO 4 :Tb 3+ , Gd 3 GaO 12 :Tb 3+ , LaOBr:Tm 3+ Phosphors, but these phosphors are mainly based on rare earth oxides (Gd 2 o 3 , La 2 o 3 ) as raw material, which makes its price high

Method used

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  • Doping zirconium calcium phosphate fluorescent material and preparing method thereof
  • Doping zirconium calcium phosphate fluorescent material and preparing method thereof
  • Doping zirconium calcium phosphate fluorescent material and preparing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] (when y=0) weigh CaCO 3 (Analytical pure) 0.392 grams, ZrO 2 (analytical pure) 0.493 g, Tb 4 o 7 (99.99%) 0.007 g, KHCO 3 (Analytical pure) 0.004 g, fully grind and mix in an agate mortar, after grinding and mixing evenly, press it into a disc with a pressure of 10MPa on a tablet machine, put it in a small capacity Al 2 o 3 In the crucible, after adding a cover, put it into a large-capacity Al 2 o 3In the crucible, put graphite or carbon between the large-capacity crucible and the small-capacity crucible, cover it and put it into a heating furnace for burning, and heat up at a heating rate of 4-8°C / min. The burning temperature is 1300°C. The time is 2 hours; it is taken out after natural cooling, and the product Ca is obtained after grinding 0.98 Tb 0.01 K 0.01 ZrO 3 . Weigh the Ca obtained in the first step 0.98 Tb 0.01 K 0.01 ZrO 3 0.541 g, with NH 4 h 2 (PO 4 ) 2 0.690g is accurately weighed according to the metering ratio, after grinding and mixin...

Embodiment 2

[0021] (when y=0) weigh CaCO 3 (analytical pure) 0.376 grams, ZrO 2 (analytical pure) 0.493 g, Tb 4 o 7 (99.99%) 0.022 g, KHCO 3 (Analytical pure) 0.012 grams, fully grind and mix in an agate mortar, after grinding and mixing evenly, press it into a disc with a pressure of 10MPa on a tablet machine, put it in a small capacity Al 2 o 3 In the crucible, after adding a cover, put it into a large-capacity Al 2 o 3 In the crucible, put graphite or carbon between the large-capacity crucible and the small-capacity crucible, cover it and put it into a heating furnace for burning, and heat up at a heating rate of 4-8°C / min. The burning temperature is 1300°C. The time is 2 hours; it is taken out after natural cooling, and the product Ca is obtained after grinding 0.94 Tb 0.03 K 0.03 ZrO 3 . Weigh the Ca obtained in the first step 0.94 Tb 0.03 K 0.03 ZrO 3 0.549 g, with NH 4 h 2 (PO 4 ) 2 0.690g is accurately weighed according to the metering ratio, after grinding and ...

Embodiment 3

[0023] (when x'=0) weigh CaCO 3 (analytical pure) 0.388 grams, ZrO 2 (analytical pure) 0.478 grams, Tb 4 o 7 (99.99%) 0.023 g, Al 2 o 3 (Analytical pure) 0.006 g, fully grind and mix in an agate mortar, after grinding and mixing evenly, press it into a disc with a pressure of 10 MPa on a tablet machine, put it in a small capacity Al 2 o 3 In the crucible, after adding a cover, put it into a large-capacity Al 2 o 3 In the crucible, put graphite or carbon between the large-capacity crucible and the small-capacity crucible, cover it and put it into a heating furnace for burning, and heat up at a heating rate of 4-8°C / min. The burning temperature is 1300°C. The time is 2 hours; it is taken out after natural cooling, and the product Ca is obtained after grinding 0.97 Tb 0.03 Zr 0.97 al 0.03 o 3 . Weigh the Ca obtained in the first step 0.97 Tb 0.03 Zr 0.97 al 0.03 o 3 0.543 g, with NH 4 h 2 (PO 4 ) 2 0.690g is accurately weighed according to the metering ratio...

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Abstract

The invention discloses a zirconium phosphate-doped calcium series fluorescent material and a method for preparing the same, belonging to the fluorescent material field. The inventive material has the chemical formula of Ca(1-x-x')TbxKx'AlyZr(1-y)(PO4)2, wherein x is the content of an activator Tb<3+>, x' is the K<+> content, y is the Al<3+> content; and (1) when y=0, x=x', 0.01<=x<=0.1; (2) when x'=0, x=y, 0.01<=x<=0.1. The preparation method comprises the following steps: using a solid phase synthesizing method, firstly burning and synthesizing the Ca(1-x-x')TbxKx'AlyZr(1-y)O3 by using the first double crucible method, then mixing the NH4H2(PO4)2 or (NH4)2H(PO4)2 or (NH4)3(PO4)2 with the Ca(1-x-x')TbxKx'AlyZr(1-y)O3 according to the stoichiometric ratio of chemical formula and burning and synthesizing the final product by using the second double crucible method. The fluorescent material prepared by the invention can be applied to the plasma flat display, indoor illuminance daylight lamp, lampion, black light lamp and green light intensifying screen with high sensitivity excited by X-ray and so on.

Description

Technical field: [0001] The invention relates to a doped zirconium-calcium phosphate fluorescent material and a preparation method thereof, belonging to the field of fluorescent materials. Background technique: [0002] With the popularity of information networks centered on computers and communications, and the rapid expansion of the market for mobile information terminal products, flat-panel displays as a human-machine video interface have shown good market prospects and become one of the most eye-catching electronic product fields. . Among them, the plasma panel display (PDP) has been paid attention to by people because of its small size, light weight, ultra-thin type, no X-ray radiation, no influence of magnetic field, large viewing angle, and fast response to rapidly changing pictures. Plasma flat panel display is a device that uses gas discharge to generate vacuum ultraviolet rays to excite three primary color phosphors to achieve display. At present, the three prima...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/70
Inventor 张志军赵景泰陈昊鸿杨昕昕
Owner SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI