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A kind of preparation method of yag:ce fluorescent powder

A phosphor, Y2O3 technology, applied in the chemical industry, can solve the problem of easy agglomeration and hardening of the phosphor, and achieve the effects of improving the reuse rate, high product porosity and good luminous performance.

Active Publication Date: 2019-08-30
SHANGHAI INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the above-mentioned technical problems in the prior art, the invention provides a kind of YAG:Ce phosphor preparation method, described this YAG:Ce phosphor preparation method will solve the YAG:Ce phosphor prepared in the prior art. The technical problem that the powder is easy to agglomerate and harden

Method used

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  • A kind of preparation method of yag:ce fluorescent powder
  • A kind of preparation method of yag:ce fluorescent powder
  • A kind of preparation method of yag:ce fluorescent powder

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Embodiment 1

[0020] A kind of preparation method that can significantly improve the porosity of YAG:Ce fluorescent powder of the present invention, specifically comprises the following steps:

[0021] Weigh Y according to the molar ratio Y:Al=0.6:1 2 o 3 、Al 2 o 3 , CeO 2 Doping ratio Y 2 o 3 、Al 2 o 3 0.06mol% of the sum of moles, H 3 BO 3 , CaCO 3 , NaF, and carboxymethyl cellulose additions were respectively Y 2 o 3 、Al 2 o 3 The sum of mass is 3wt%, 0.25wt%, 2wt%, 0.75wt%. Put all the reaction raw materials in the mixing bottle, add agate grinding beads and deionized water according to the ball: material mass ratio of 2:1 and water: material mass ratio of 3:1. The mixing bottle was placed in an ultrasonic instrument, sonicated at room temperature for 30 minutes, and then mixed for 5 hours. The water and materials were fully dried in a constant temperature drying oven at 85°C, passed through a 200-mesh sieve, then transferred to a small crucible, and placed in a large cr...

Embodiment 2

[0027] Weigh Y according to the molar ratio Y:Al=0.6:1 2 o 3 、Al 2 o 3 , CeO 2 The doping ratio is 0.06mol%, H 3 BO 3 , CaCO 3 , NaF, and carboxymethyl cellulose were added in amounts of 1wt%, 2wt%, 1wt%, and 2wt%, respectively. Put all the reaction raw materials in the mixing bottle, add agate grinding beads and deionized water according to the ball: material mass ratio of 2:1 and water: material mass ratio of 3:1. The mixing bottle was placed in an ultrasonic instrument, ultrasonicated for 20 minutes at room temperature, and then mixed for 10 hours. Fully dry the water and materials in a constant temperature drying oven at 60°C, pass through a 200-mesh sieve, then transfer to a small crucible, and place it in a large crucible covered with reduced carbon powder. The crucible was placed in a rapid heating furnace and kept at 1450°C for 5 hours. The phosphor powder cooled to room temperature with the furnace was taken out, and after a little grinding, the YAG:Ce phosph...

Embodiment 3

[0029] Weigh Y according to the molar ratio Y:Al=0.6:1 2 o 3 、Al 2 o 3 , CeO 2 The doping ratio is 0.06mol%, H 3 BO 3 , CaCO 3, NaF, and carboxymethyl cellulose were added in amounts of 1wt%, 2wt%, 0.5wt%, and 3wt%, respectively. Put all the reaction raw materials in the mixing bottle, add agate grinding beads and deionized water according to the ball: material mass ratio of 2:1 and water: material mass ratio of 3:1. The mixing bottle was placed in an ultrasonic instrument, sonicated at room temperature for 30 minutes, and then mixed for 15 hours. Fully dry the water and materials in a 100°C constant temperature drying oven, pass through a 200-mesh sieve, then transfer to a small crucible, and place it in a large crucible covered with reduced carbon powder. The crucible was placed in a rapid heating furnace and kept at 1380°C for 8 hours. The phosphor powder cooled to room temperature with the furnace was taken out, and after a little grinding, the YAG:Ce phosphor pow...

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Abstract

The invention provides a preparation method of YAG: Ce fluorescent powder. The method comprises the following steps: weighing Y2O3, Al2O3, CeO2, H3BO3, CaCO3, NaF, and carboxymethyl cellulose, placingthe raw materials in a container, adding agate grinding beads and deionized water, placing the container in an ultrasonic instrument, and mixing the materials; drying the uniformly mixed raw materials, passing the dried raw materials through a 200-mesh sieve, transferring the raw materials to a small crucible, then placing the small crucible in a large crucible spread with reduction powdered carbon, placing the crucible in a rapid heating furnace, heating the crucible to the temperature of 1350-1450 DEG C, and insulating for 5-10 hours; taking the sintered powder out, and slightly grinding the powder to obtain the YAG: Ce fluorescent powder. The prepared YAG: Ce fluorescent powder has the advantages of high loosening degree, and uniform and small size. The method has the characteristics of simple process, low cost, high loosening degree of product, and good luminescence performance, and is suitable for industrial production.

Description

technical field [0001] The invention belongs to the field of chemical engineering, and relates to a fluorescent powder, in particular to a method for preparing a YAG:Ce fluorescent powder. Background technique [0002] Solid luminescent materials are currently the most widely used luminescent materials on the market. LEDs composed of phosphor powder and corresponding excited chips have been widely used in indoor lighting, outdoor advertising, Exhibition stage, LCD screen backlight and other fields. [0003] White light source is the most demanded lighting source in the market. The most widely used commercially is the combination of 450nm-470nm InGaN blue light chip and YAG:Ce yellow phosphor that can be excited by blue light. When the LED is supplied with current, the blue light chip excited by the driving current emits blue light, a part of which is absorbed by the phosphor and excites a yellow light of about 550nm, and the remaining blue light passes through and mixes wit...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/80
Inventor 江国健赵前程
Owner SHANGHAI INST OF TECH
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