Novel preparation process of LED (light-emitting diode)

Abstract

The invention discloses a novel preparation process of an LED (light-emitting diode). The preparation process comprises the following steps of: preparing raw material powder and restoring in a rotary kiln at high temperature, wherein the step of preparing the material powder is as follows: weighing 55.59g of Y2O3, 21.73g of CeO, 42.69g of Al2O3, 31g of H3BO, and 21g of BaF according to the stoichiometric proportion, and adding an agate ball to mix for 72 hours in a material mixer, and the step of restoring the material powder in the rotary kiln at the high temperature is as follows: uniformlymixing and putting a sample into a 500cc of crucible, covering in atmosphere of N2 and 3H2, and preserving the heat for 6 hours at 1500 DEG C; and crushing and sieving, ball-milling or airstream crushing, wetly sieving, cleaning and centrifugally dripping. The novel preparation process has the advantages that the novel preparation process of the LED adopts a tri-color blue powder kiln to directlyrestore, crush, wash, clean and bake the product at the high temperature; and the granularity of LED fluorescent powder is controlled by adjusting the temperature of a furnace, the heat preservation time and the adding quantity of a fluxing agent, and the advantages of small energy consumption and high yield are achieved.

Description

technical field [0001] The invention relates to a luminescent material, in particular to a novel LED preparation process. Background technique [0002] In 1997, Nakamura of Nichia Co., Ltd. coated YAG:Ce on blue-ray InGaN / GaN chips 3+ Yellow phosphor, the yellow light emitted by the phosphor mixed with the blue light emitted by the industrial nGaN / GaN chip to form white light, thus triggering a revolution in lighting methods. Compared with traditional incandescent lamps and fluorescent lamps, white LEDs have small size (small particles, easy to combine), low calorific value (no heat radiation), low power consumption, long life (more than 10,000 hours), fast response, and environmental protection (no Mercury pollution, recyclable) and other advantages. YAG:Ce 3+ Phosphor plays a very critical role in white LEDs. [0003] YAG:Ce 3+ The matrix of the phosphor is yttrium aluminum garnet, which has good mechanical properties, physical and chemical properties, high temperatur...

AI Technical Summary

Problems solved by technology

[0004] The present invention aims at the problems of long technological process, difficult process control, low yield, high energy consumption, unstable product and high production cost of the traditional LED production process, and improves the process and formula; provides a A new LED preparation process with low energy consumption, high yield and low production cost

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