Preparation method of low-melting-point optical glass powder for automobile lighting, and preparation method of glass ceramic fluorescent sheet

Abstract

The invention relates to a preparation method of low-melting-point optical glass powder for automobile lighting. The preparation method comprises the following steps: uniformly mixing raw materials, smelting at high temperature, crushing, sieving, ball-milling, drying and sieving to obtain the low-melting-point optical glass powder. A preparation method of a glass ceramic fluorescent sheet comprises the following steps: uniformly mixing fluorescent powder and the low-melting-point optical glass powder, and preparing the glass ceramic fluorescent sheet through molding, calcining, cutting, grinding and the like. The glass ceramic fluorescent sheet is stable in physical and chemical properties, resistant to acid and alkali, free of reaction with water, oxygen and carbon dioxide in the naturalenvironment, high in optical density, resistant to heat, non-toxic and free of pollution; and the glass ceramic fluorescent sheet is simple to manufacture, easy to operate, low in cost, free of pollution and easy for industrial production. The problems of poor weather resistance, poor thermal stability, yellowing degradation, low optical density and the like of traditional LED packaging are solved.

Description

technical field [0001] The invention relates to a method for preparing a low-melting-point optical glass powder and a glass-ceramic fluorescent sheet for automobile lighting, and belongs to the technical field of LED luminescent materials. Background technique [0002] At present, white LEDs are mainly used in lighting and backlighting, and the use of LEDs as lights has been recognized all over the world. With the expansion of the application field of LED, the requirements for LED are getting higher and higher. [0003] LED white light is mainly made of silica gel resin mixed with fluorescent powder, which is excited by blue light to produce green light, yellow light, and red light, and finally mixed to obtain white light. However, due to the poor weather resistance and thermal stability of the resin, it will cause serious light decay, light color shift, yellowing and serious aging. [0004] The thermal conductivity of traditional silicone resin for packaging is less than ...

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Problems solved by technology

[0006] Aiming at the deficiencies in the prior art, the present invention provides low-melting-point optical glass powder for automotive lighting, and a solid ceramic fluorescent sheet with good physical and chemical stability and high luminous efficiency, so as to solve the problems of poor weather resistance and thermal stability in traditional LED packages. Poor, yellowing deterioration, low optical density, etc.

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