Milky white glass lamp tube for LEDs, milky white bulb for LEDs, and their manufacturing method

Abstract

The invention provides a milky white glass lamp tube for LEDs, a milky white bulb for LEDs, and their manufacturing method. According to a formula of the glass lamp tube / bulb, quartz sand, potash feldspar, sodium carbonate, calcite, fluorite, sodium fluosilicate, nitrate and compound clarifier containing CeO2 are matched according to respective usage proportions; the nitrate and the compound clarifier containing CeO2 are both oxide clarifiers; the fluorite and the sodium fluosilicate are emulsifiers. According to weight percentage, SiO2 accounts for 67% to 69%, Al2O3 accounts for 4% to 5%, CaO accounts for 5% to 6%, Na2O and K2O account for 17% to 18%, and F- accounts for 4% to 5%. The invention further provides the manufacturing method of the glass lamp tube / bulb; a body of the glass lamp tube / bulb produced by the manufacturing method is milky white glass lamp tube / bulb, which never ages or yellows and which emits uniform, soft light; thus, LED luminous efficiency and light source quality are evidently improved.

Description

technical field [0001] The invention relates to the lighting field, in particular to a milky white glass lamp tube for LEDs, a bulb and a manufacturing method thereof. Background technique [0002] At present, in order to obtain a light source with good color rendering, uniform and soft light, suitable for human vision, and good heat dissipation performance and high light efficiency, milky white glass lamp tubes and bulbs are widely used in LED lighting. This kind of material is formed by spraying optical resin or fluorescent powder on the inner wall of transparent glass lamp tube and bulb shell. Transparent glass lamp tube, bulb, its chemical composition (mass percentage): SiO 2 70.5~72%, Al 2 o 3 1.5~2.5%, CaO+MgO 9~10%, Na 2 O+K 2 O 16.5-17.5%. The formula is made of quartz sand, potassium feldspar, dolomite, soda ash, Glauber's salt, and carbon powder in different proportions. Among them, Glauber's salt and carbon powder are clarifiers, and this kind of batch is a ...

AI Technical Summary

Problems solved by technology

The glass produced by this formula, due to the reducibility of the batch material, the impurities in it are low-priced Fe 2+ Ions cannot be fully oxidized to Fe 3+ The glass is slightly colored into light blue, which affects the light transmittance to a certain extent and reduces the light effect.

[0003] Moreover, the existing milky white glass lamp tubes and bulbs are obtained by secondary processing of transparent glass lamp tubes and bulb inner walls by spraying, and the milky white glass lamp tubes and bulbs formed by spraying tend to age and turn yellow with time. Affects light efficiency and light source quality

In addition, this method needs to invest in adding corresponding equipment and consumes electricity; through the corresponding process, the wages of personnel will be increased; and a certain amount of optical resin or phosphor will be consumed, which will increase the material consumption of the product.

This increases the production cost of LED

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