High-color-rendering composite fluorescent glass and preparation method thereof

Abstract

The invention discloses high-color-rendering composite fluorescent glass and a preparation method thereof. The high-color-rendering composite fluorescent glass comprises a PiG layer and a red fluorescent powder layer. The preparation method of the high-color-rendering composite fluorescent glass comprises the following steps: weighing a certain amount of raw materials according to a low-melting-point glass formula, uniformly mixing, putting into a crucible, melting for 0.1-4 hours, carrying out water quenching on the molten glass liquid, drying, grinding and sieving to obtain matrix glass powder; the preparation method comprises the following steps: mixing matrix glass powder and commercial green or yellow fluorescent powder according to a required mass ratio, putting the mixture into a crucible, melting for 0.1-4 hours, pouring a melt into a mold which is heated to a certain temperature, paving a layer of red fluorescent powder in the mold in advance, quickly covering the mold after the melt in the crucible completely flows into the mold, continuously keeping the temperature for 0.1-1 hour, and cooling to room temperature, thereby obtaining the red fluorescent powder. And naturally cooling to room temperature, and carrying out annealing treatment to obtain the composite fluorescent glass material. The preparation method provided by the invention is suitable for compounding matrix glass of different systems and various fluorescent powders, and is wide in application field and easy for large-scale production.

Description

technical field [0001] The invention is applied to the field of fluorescent materials, in particular to a high color rendering composite fluorescent glass and a preparation method thereof. Background technique [0002] In recent years, LED lighting technology has gradually replaced traditional light sources such as incandescent lamps as the fourth-generation solid-state lighting source due to its high efficiency, energy saving, long service life, and low production cost. Among them, commercial white LEDs mostly use a combination of blue LEDs and yellow phosphors / silica gel . However, there is an increasing demand for high-brightness, long-range light sources such as high-power white LEDs and laser lighting in the fields of outdoor lighting, vehicle lighting, mining engineering, etc., which makes it difficult for organic polymers such as silicone or epoxy resin to effectively transmit high power The huge heat generated by the components causes yellowing, carbonization, and t...

AI Technical Summary

Problems solved by technology

The composite fluorescent glass material has excellent luminous efficiency and color rendering index, but the composite fluorescent glass material is limited to B 2 o 3 -SiO 2 -CaO-Na 2 O matrix glass system, resulting in the mixed melt of phosphor powder and matrix glass cannot be quenched and formed, which is not conducive to large-scale production

In addition, during the melting process, the strong interfacial reaction with the matrix glass will corrode the phosphor particles and reduce their luminous performance, especially the degree of corrosion of different phosphor particles by the matrix glass is not uniform, and the temperature rise will further aggravate the process

Therefore, when using the traditional low-temperature co-firing technology to prepare PiG, the matrix glass system that contains a variety of phosphors and meets the required luminous performance has very few options, and is not suitable for some phosphors with poor thermal stability.

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