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White light LED (Light Emitting Diode) resin mixing phosphor and preparation method thereof

A technology for mixing powder and white light, applied in chemical instruments and methods, adhesives, luminescent materials, etc., can solve the problems of poor dispersion and temperature stability of phosphor powder, poor heat dissipation and heat resistance of LED powder glue, etc. Aging, good chemical stability, good dispersion and temperature stability

Inactive Publication Date: 2017-03-29
HANGZHOU XINHU ELECTRONICS CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention aims to solve the problems of poor heat dissipation and heat resistance of the prior art LED compounding glue, as well as the poor dispersion and temperature stability of phosphor powder, and provides a reasonable and scientific compatibility, low cost, phosphor dispersion and phosphor powder Good temperature stability, small distribution difference in the glue, which is beneficial to improve the concentration of small and medium power color areas and the service life of white LED powder glue

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] (1) Preparation of pretreated YAG yellow phosphor

[0026] (1) Evenly disperse YAG yellow fluorescent powder in lye (sodium hydroxide solution with a mass percentage concentration of 5%), soak for 12 hours, then centrifuge, then wash it with water until the supernatant is neutral, suction filter, and dry dry, ready to use;

[0027] (2) Measure the required amount of magnesium nitrate according to the ratio of magnesium oxide to YAG yellow phosphor mass ratio of 5:100, and dissolve magnesium nitrate in water to prepare a magnesium nitrate solution with a concentration of 0.5mol / L;

[0028] (3) Add YAG yellow fluorescent powder to a sodium diacetate solution with a pH value of 4 and a concentration of 0.5 mol / L, and ultrasonically disperse it to obtain a suspension;

[0029] (4) Gradually add the magnesium nitrate solution dropwise into the suspension liquid, stir for 1 hour, after sedimentation, centrifugation, water washing, dehydration, and drying, calcinate at 300°C ...

Embodiment 2

[0035] (1) Preparation of pretreated YAG yellow phosphor

[0036](1) Evenly disperse YAG yellow fluorescent powder in lye (sodium hydroxide solution with a concentration of ~% by mass), soak for 18 hours and then centrifuge, then wash it with water until the supernatant is neutral, suction filter, and dry dry, ready to use;

[0037] (2) Measure the required amount of magnesium nitrate according to the ratio of magnesium oxide to YAG yellow phosphor mass ratio of 10:100, and dissolve magnesium nitrate in water to prepare a magnesium nitrate solution with a concentration of 0.6mol / L;

[0038] (3) Add YAG yellow fluorescent powder to a sodium diacetate solution with a pH value of 6 and a concentration of 0.6 mol / L, and ultrasonically disperse it to obtain a suspension;

[0039] (4) Gradually add the magnesium nitrate solution dropwise into the suspension liquid, stir for 2 hours, after sedimentation, centrifugation, water washing, dehydration and drying, calcinate at 400°C for 4...

Embodiment 3

[0045] (1) Preparation of pretreated YAG yellow phosphor

[0046] (1) Evenly disperse YAG yellow fluorescent powder in lye (5.5% potassium hydroxide solution by mass percentage), soak for 15 hours and then centrifuge, then wash it with water until the supernatant is neutral, suction filter, and dry dry, ready to use;

[0047] (2) Measure the required amount of magnesium nitrate according to the ratio of magnesium oxide to YAG yellow phosphor mass ratio of 8:100, and dissolve magnesium nitrate in water to prepare a magnesium nitrate solution with a concentration of 0.55mol / L;

[0048] (3) Add YAG yellow fluorescent powder to a sodium diacetate solution with a pH value of 5 and a concentration of 0.55 mol / L, and disperse it ultrasonically to obtain a suspension;

[0049] (4) Gradually add the magnesium nitrate solution dropwise into the suspension, stir for 1.2 hours, sink, centrifuge, wash, dehydrate and dry, then calcinate at 350°C for 3 hours, cool and pulverize to obtain T...

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Abstract

The invention discloses white light LED (Light Emitting Diode) resin mixing phosphor. The white light LED resin mixing phosphor is prepared from the following components in parts by weight: 10-20 parts of pre-treated YAG yellow phosphor powder, 1-3 parts of terpene resin, 0.3-0.5 part of modified mica powder and 80-100 parts of double-component A / B epoxy resin, wherein the component A epoxy resin is WL-700A-2T and the component B epoxy resin is WL-700B-2T; and the mass ratio of the component A epoxy resin to the component B epoxy resin is 1 to 1. The white light LED resin mixing phosphor disclosed by the invention is reasonable and scientific in compatibility, low in cost and good in phosphor powder dispersity and temperature stability; the white light LED resin mixing phosphor has small distribution difference in glue; and the improvement of the concentration degree of middle-power and small-power color regions and the prolonging of the service life of an LED are facilitated. The invention further disclsoes a preparation method of the white light LED resin mixing phosphor, and process steps are simple, requirements on equipment are low and the operability is high.

Description

technical field [0001] The invention relates to the technical field of white light LED packaging, in particular to a white light LED compounding glue and a preparation method thereof. Background technique [0002] At present, commercial white LEDs are mainly realized by combining InGaN-based blue LED chips and cerium-doped yttrium aluminum garnet YAG phosphors. The specific method is as follows: firstly, the fluorescent powder is evenly mixed in transparent epoxy resin (as a carrier) to make a powder compound glue, and then the powder compound glue is coated on the LED chip, and the blue light emitted by the LED chip is absorbed by the phosphor powder and absorbed. Converted to yellow light, the remaining blue light enters the epoxy resin and recombines with yellow light to obtain white light. [0003] However, the heat dissipation and heat resistance of the current epoxy resin are poor, and it is easy to change color and fail, reducing the light output of the LED, resultin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J163/00C09J11/04C09J11/08C09K11/02C09K11/80
CPCC09J163/00C08L2201/08C08L2203/206C08L2205/025C08L2205/03C09J11/04C09J11/08C09K11/025C09K11/7706C08L63/00C08L45/00C08K9/10C08K2003/222C08K9/04C08K3/34
Inventor 谢琦明
Owner HANGZHOU XINHU ELECTRONICS CO LTD
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