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A cao‑sio2‑b2o3 calcium-rich double-radical system phosphor

A technology of cao-sio2-b2o3 and phosphor powder, applied in the direction of luminescent materials, chemical instruments and methods, etc., can solve the problems of increasing the manufacturing process, difficulty in trichromatic emission, and increasing production costs, and achieves good stability and excellent preparation process Simple, low-cost effect

Inactive Publication Date: 2018-03-30
SHANGHAI INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing three-primary-color phosphors are difficult to achieve three-primary-color emission in one system, and most of them need to combine phosphors of different systems to achieve color conversion, which invisibly increases the manufacturing process and increases the production cost.

Method used

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  • A cao‑sio2‑b2o3 calcium-rich double-radical system phosphor
  • A cao‑sio2‑b2o3 calcium-rich double-radical system phosphor
  • A cao‑sio2‑b2o3 calcium-rich double-radical system phosphor

Examples

Experimental program
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Effect test

Embodiment 1

[0016] 10.98CaO-4SiO 2 -B 2 o 3 -0.02Ce 2 o 3 (Denoted as 1# sample) Synthesis of phosphor powder

[0017] Weigh 1.4572g CaCO according to the stoichiometric ratio 3 , 0.3246g SiO 2 , 0.1670g H 3 BO 3 and 0.0511 g CeO 2 Put it in an agate mortar, add an appropriate amount of acetone to assist in grinding the raw materials evenly, put the mixture in a corundum crucible, and calcinate it in a high-temperature resistance furnace at 1250°C for 12 hours under a C reducing atmosphere, take it out and grind it to get the final product.

[0018] The photoluminescence spectrum of the 1# fluorescent powder that this embodiment case prepares is as follows figure 1 As shown, under the excitation of 365nm ultraviolet light, 1# phosphor exhibits strong blue light emission, the luminescent center is located at 440nm, and its chromaticity coordinates (1931) are: (x=0.2128, y=0.428). .

Embodiment 2

[0020] 10.995CaO-4SiO 2 -B 2 o 3 Synthesis of -0.005EuO (marked as 2# sample) phosphor

[0021] Weigh 1.4913g CaCO according to the stoichiometric ratio 3 , 0.3272g SiO 2 , 0.1684g H 3 BO 3 and 0.0132gEu 2 o 3 Put it in an agate mortar, add an appropriate amount of acetone to assist in grinding the raw materials evenly, put the mixture in a corundum crucible, and calcinate it in a high-temperature resistance furnace at 1250°C for 12 hours under a C reducing atmosphere, take it out and grind it to get the final product.

[0022] The luminescence spectrum of the 2# fluorescent powder prepared by this implementation case is as follows figure 2 As shown, under the excitation of 365nm ultraviolet light, the 2# phosphor exhibits strong green light emission, the luminescent center is located at 505nm, and its chromaticity coordinates (1931) are: (x = 0.1541, y = 0.1082).

Embodiment 3

[0024] 10.9CaO-4SiO 2 -B 2 o 3 -0.1Eu 2 o 3 (Denoted as 3# sample) Synthesis of Phosphor Powder

[0025] Weigh 1.2798g CaCO according to the stoichiometric ratio 3 , 0.3104g SiO 2 , 0.1597g H 3 BO 3 and 0.2500gEu 2 o 3 Put it in an agate mortar, add an appropriate amount of acetone to assist in grinding the raw materials evenly, put the mixture in a corundum crucible, and calcinate it in a high-temperature resistance furnace at 1250°C for 12 hours under a C reducing atmosphere, take it out and grind it to get the final product.

[0026] The luminescence spectrum of the 3# fluorescent powder prepared by this implementation case is as follows image 3 As shown, under the excitation of 365nm ultraviolet light, the 3# phosphor exhibits strong red light emission, the luminescent center is located at 611nm, and its chromaticity coordinates (1931) are: (x = 0.4984, y = 0.3257).

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Abstract

The invention discloses a CaO-SiO2-B2O3 calcium-rich double-radical system fluorescent powder. The system phosphor contains both silicate and borate, and 11:4>CaO:SiO2≥10:4, CaO:B2O3≥10:1, 4≤SiO2:B2O3≤4.8. Under the excitation of 365nm ultraviolet light, CaO‑SiO2‑B2O3‑Ce2O3, CaO‑SiO2‑B2O3‑EuO, and CaO‑SiO2‑B2O3‑Eu2O3 phosphors respectively exhibit strong blue, green and red primary color luminescence, indicating that the system Phosphor powder has the value of assembling LED devices with standard 365nm UV chips. In addition, the calcium-rich feature of the system not only greatly improves the stability of the phosphor, but also reduces the production cost of the phosphor, and is a phosphor matrix system with excellent performance.

Description

technical field [0001] The invention relates to the technical field of trichromatic fluorescent powders excited by ultraviolet chips, in particular to a CaO-SiO 2 -B 2 o 3 Calcium-rich double-radical system phosphor. Background technique [0002] White LED has become a research hotspot in the field of lighting because of its small size, high luminous efficiency, energy saving, environmental protection, and long life. At present, there are three main ways to generate white light emission based on LEDs: (1) Multi-color combination method, that is, white light is generated by mixing red, green, and blue colors, such as combining red, green, and blue (RGB) three-color light-emitting diodes . (2) Use UV LEDs to excite RGB phosphors. (3) Use blue light-emitting diodes to excite yellow phosphors. Blue light chips excite yellow phosphors to produce white light, which is currently the most commonly used combination scheme of white light LEDs, and commercial production has been ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/63C09K11/79
Inventor 房永征于圣洁侯京山朱付萍李柯旺张娜刘启会
Owner SHANGHAI INST OF TECH
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