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Fluorescent powder for improving LED color rendering index and color rendering value and preparation method thereof

A color rendering index, green phosphor technology, applied in the field of LED lighting, can solve the problems of weak ultraviolet radiation resistance, insufficient product adhesion, low light transmittance, etc., to improve luminous efficiency, soft light, and transparency. high effect

Inactive Publication Date: 2019-09-17
SOPHIA ENG DONGGUAN LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] Based on this, the primary purpose of the present invention is to provide a phosphor powder and its preparation method that can improve the LED color rendering index and color rendering value. The phosphor powder and the preparation method solve some defects in traditional LED packaging such as low refractive index, Defects such as poor heat resistance, weak resistance to ultraviolet radiation, insufficient product adhesion, and low light transmittance

Method used

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Examples

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Effect test

preparation example Construction

[0048] The preparation method of the fluorescent powder for improving the LED color rendering index and color rendering value realized by the present invention comprises the following steps:

[0049] 101. Mix the No. 01 agent formed by the modified silicone resin and the curing agent according to the above composition formula, and then fully stir to obtain a colloidal liquid;

[0050] 102. Dissolving the nitride phosphor powder and the metal phosphor powder in the colloidal liquid obtained in step 101, and fully stirring again to obtain a mixed liquid;

[0051] During the stirring process, the temperature is kept at room temperature, and the nitride phosphor mixture will generate foam during the stirring process, which needs to be vacuumed by vacuuming;

[0052] 103. Mix the mixed liquid with the anti-sedimentation powder and the diffusion powder, and stir thoroughly to obtain the fluorescent powder.

[0053] After the modified silicone resin, curing agent, nitride red phosph...

Embodiment 1

[0056] The weight ratio of the two components of the No. 01 agent and the No. 02 agent is 68.5%: 31.5%. In terms of ratio, the No. 01 agent is mixed with a modified silicone resin and a curing agent. In the formulation of No. 01 agent, the dosage of modified silicone resin and curing agent is configured according to the ratio of 91%:0.9%. Among them, the modified silicone resin is composed of 5% linear polydimethylsiloxane, 77.2% bisphenol A epoxy resin, 17.5% long-chain epoxy resin, and 0.3% defoamer. Lubricity, flexibility, high and low temperature resistance, aging resistance, low surface tension and other characteristics; the curing agent is an acid anhydride curing agent, specifically phthalic anhydride in this embodiment.

[0057] Nitride red phosphor powder, nitride green phosphor powder, aluminate yellow phosphor powder, anti-sinking powder, and diffusion powder form No. 02 agent in the LED phosphor powder formula of the present invention, and the amount of nitride red...

Embodiment 2

[0066] The weight ratio of the two components of the No. 01 agent and the No. 02 agent is 70.5%: 29.5%. In proportion, the No. 01 agent is mixed with a modified silicone resin and a curing agent. The modified silicone resin is composed of 5% linear polydimethylsiloxane, 77.2% bisphenol A epoxy resin, 17.5% long-chain epoxy resin, and 0.3% defoamer. It has the superior lubricity of silica gel, Softness, high and low temperature resistance, aging resistance, low surface tension, etc., the curing agent is an acid anhydride curing agent, specifically realized as tetrahydrophthalic anhydride. No. 01 agent is composed of modified silicone resin: curing agent according to the ratio of 91%: 0.9%.

[0067] Nitride red phosphor powder, nitride green phosphor powder, aluminate yellow phosphor powder, anti-sinking powder, and diffusion powder form No. 02 agent in the LED phosphor powder formula of the present invention, wherein, nitride red phosphor powder: 4.65%, nitrogen Compound green...

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Abstract

The invention discloses fluorescent powder for improving LED color rendering index and color rendering value and a preparation method thereof. The fluorescent powder is at least formed by mixing modified silicone resin, a curing agent, nitride fluorescent powder and metal fluorescent powder, wherein the modified silicone resin and the curing agent form an agent 01, and the rest components form an agent 02; wherein, the fluorescent powder comprises the following components in%age by mass: 18.5 to 25.5% of the nitride fluorescent powder, 1.4 to 2.14% of the metal fluorescent powder and the balance of the agent 01. According to the invention, the modified silicone resin composition with high transparency, high refractive index, excellent ultraviolet aging resistance and excellent thermal aging resistance is designed by using the modified silicone resin, the problems of refractive index, heat resistance, ultraviolet radiation resistance and light transmittance are effectively solved, and the luminous efficiency of LED devices is improved.

Description

technical field [0001] The invention relates to the technical field of LED lighting, in particular to a phosphor powder formulation for LED production and a preparation method thereof. Background technique [0002] Phosphor powder, commonly known as luminous powder, is usually divided into two types: photo-induced energy storage luminous powder and radioactive luminous powder. Photo-energy storage luminous powder is a fluorescent powder that stores light energy after being irradiated by natural light, daylight, ultraviolet light, etc., and then slowly releases it in the form of fluorescence after stopping the light irradiation, so it can be used at night or in dark places. , can still see the luminescence, which lasts for several hours to more than ten hours. [0003] In real life, people use the characteristics of luminous powder to emit light for a long time to make a weak lighting source, and apply this material to various switch signs on aviation instruments, clocks, wi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/02C09K11/08H01L33/50
CPCC09K11/025C09K11/0883H01L33/504H01L2933/0041
Inventor 马诗懿杨禄
Owner SOPHIA ENG DONGGUAN LTD
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