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Borophosphate fluorescent powder capable of emitting green fluorescence as well as preparation method and application of borophosphate fluorescent powder

A borophosphate and green fluorescence technology, applied in the field of borophosphate phosphor and its preparation, can solve the problem of high price, and achieve the effects of easy mass production, simple equipment and low cost

Active Publication Date: 2015-03-25
英特美光电(苏州)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

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+ , GdTa0 4 :Tb 3+ , Gd 3 GaO 12 : Tb 3+ Phosphors, but these phosphors are mainly based on rare earth oxides (Gd 2 o 3 ) as the raw material, which makes its price high

Method used

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  • Borophosphate fluorescent powder capable of emitting green fluorescence as well as preparation method and application of borophosphate fluorescent powder
  • Borophosphate fluorescent powder capable of emitting green fluorescence as well as preparation method and application of borophosphate fluorescent powder
  • Borophosphate fluorescent powder capable of emitting green fluorescence as well as preparation method and application of borophosphate fluorescent powder

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Experimental program
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preparation example Construction

[0025] The preparation method of above-mentioned borophosphate fluorescent powder, it comprises the following steps:

[0026] NH first 4 h 2 PO 4 、H 3 BO 3 , Ln 2 o 3 (Ln is one or a combination of La, Gd, Yb and Lu) and Tb 4 o 7 as raw material, press (Ln 1-x Tb x ) 7 o 6 (BO 3 )(PO 4 ) 2 (0.01≤x≤0.1) The stoichiometric ratio is used for batching, after grinding, it is placed in a covered alumina crucible and heated at 300-500°C for 6-12 hours to obtain the initial product; NH 4 h 2 PO 4 、H 3 BO 3 , Ln 2 o 3 and Tb 4 o 7 These raw materials are low in cost and easy to obtain, and the reaction conditions of this step are easy to control.

[0027] Then the initial product obtained in the first step is ground and pressed into a disc with a diameter of 1 to 5 cm (the pressure of the initial product pressed into a disc is preferably 150 to 200Mpa), and placed in a covered platinum crucible; The product is ground and pressed into a disc, which can reduce the...

Embodiment 1

[0032] This embodiment provides a kind of borophosphate fluorescent powder, and its chemical formula is: Gd 6.3 Tb 0.7 o 6 (BO 3 )(PO 4 ) 2 , in order to prepare the phosphor, the specific operation is: weigh NH 4 h 2 PO 4 (Analytical pure) 1.38g, H 3 BO 3 (Analytical pure) 0.37g, Gd 2 o 3 (99.99%) 6.85g and Tb 4 o 7 (99.99%) 0.785g, fully ground and mixed in an agate mortar, then placed in an alumina crucible and closed the lid, placed in a muffle furnace and heated at 500°C for 6 hours; then the primary product after heating and reaction Put it in an agate mortar and grind it thoroughly, then pour it into a tablet press and press it into a disc with a diameter of 5 cm under 150 MPa, put the disc in a covered platinum crucible, and then place the platinum crucible in a place containing a large amount of carbon In the muffle furnace of the powder, the temperature is raised to 1000°C at a rate of 5°C per minute, and it is calcined for 30 hours and then naturally co...

Embodiment 2

[0034] This embodiment provides a kind of borophosphate fluorescent powder, and its chemical formula is: Gd 6.93 Tb 0.07 o 6 (BO 3 )(PO 4 ) 2 , in order to prepare the phosphor, the specific operation is: weigh NH 4 h 2 PO 4 (analytical pure) 1.38 g, H 3 BO 3 (Analytically pure) 0.37 g, Gd 2 o 3 (99.99%) 7.53 g and Tb 4 o 7 (99.99%) 0.079 g, thoroughly ground and mixed in an agate mortar, then placed in an alumina crucible with the lid closed and heated in a muffle furnace at 300°C for 12 hours; then the primary product after heating reaction Put it in an agate mortar and grind it thoroughly, then pour it into a tablet press and press it into a disc with a diameter of 1 cm under 200 MPa, put the disc in a covered platinum crucible, and then place the platinum crucible in a place containing a large amount of carbon In the muffle furnace of the powder, the temperature is raised to 1500°C at a rate of 10°C per minute, calcined for 12 hours, and then naturally cooled ...

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Abstract

The invention relates to borophosphate fluorescent powder capable of emitting green fluorescence as well as a preparation method and application of the borophosphate fluorescent powder. The chemical constitution general formula of the borophosphate fluorescent powder is (Ln1-xTbx)7O6(BO3)(PO4)2, wherein Ln represents rare earth elements, and x is more than or equal to 0.01 and less than or equal to 0.1. The preparation method of the borophosphate fluorescent powder capable of emitting green fluorescence comprises the following steps: (a) adding ground NH4H2PO4, H3BO3, Ln2O3 and Tb4O7 into a covered alumina crucible, and heating to react at 300-500 DEG C for 6-12 hours, so as to obtain a head product; (b) pressing the ground head product into a wafer with the diameter of 1cm-5cm, and adding the wafer into a covered platinum crucible; and (c) putting the platinum crucible in a heating furnace containing carbon powder, calcining at 1000-1500 DEG C for 12-30 hours, and naturally cooling to obtain the borophosphate fluorescent powder. By virtue of magnetic dipole transition of electrons on a terbium ion outer layer from <5>D4 to <7>F5, the borophosphate fluorescent powder is capable of emitting green fluorescence. The preparation method of the borophosphate fluorescent powder capable of emitting green fluorescence has the beneficial effects that utilized equipment is simple and safe to operate, conditions are easy to control, and the quality of a prepared product is reliable.

Description

technical field [0001] The invention relates to a borophosphate fluorescent powder, in particular to a borophosphate fluorescent powder emitting green fluorescence under X-ray, ultraviolet excitation or vacuum ultraviolet excitation, and a preparation method and application thereof. 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 flat panel display (PDP) has been valued by people because of its small size, light weight, ultra-thin type, no X-ray radiation, no influence of magnetic fields, 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...

Claims

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Application Information

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IPC IPC(8): C09K11/81
Inventor 段成军顾竟涛周卫新
Owner 英特美光电(苏州)有限公司
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