Method for coating infrared lighting tube or bulb with double colors

Abstract

The invention discloses a method for coating an infrared lighting tube or a bulb with double colors, which comprises the following steps of: step 1, at first, plating gold on a quartz glass shell of the infrared lighting tube or the bulb to form a gold-plated layer; step 2, whitening the gold-plated layer to form a whitened layer, wherein the area of the whitened layer is larger than that of the gold-plated layer, and the whitened layer wraps the gold-plated layer. In the product prepared by the method, provided by the invention, the gold-plated layer is not evaporated and lost even if the gold-plated layer has a high temperature, and a double-colored gold-plated and whitened coating is realized on a large-power infrared lamp. Therefore, the product prepared by the method has the advantages of not only high reflectivity of the gold-plated layer but also high temperature resistance of the whitened layer; and the energy-saving and high-efficiency effects of the large-power infrared lamp are realized while the reflection use ratio of the large-power infrared lamp is greatly improved.

Description

technical field [0001] The invention provides a method for performing two-color coating on the outside of an infrared lamp tube or bulb. Background technique [0002] At present, in order to increase its directional radiation effect, the known infrared lamps all have reflective coatings on the transparent quartz glass tubes. There are basically two types of reflective coating materials: one is high-temperature white coating, and the material used is aluminum oxide or silicon carbide. The coating of the white-painted lamp tube is more resistant to high temperature, and can achieve a power of more than 80w per centimeter, but the disadvantage of the white-coated lamp tube is that the reflectivity is low. Only 65%; the other is low-temperature gold plating, the reflectivity of gold plating is 95%, the reflectivity is higher, but the melting point of gold plating is about 1064.43 ℃, gold plating is not resistant to high temperature, so the gold-plated lamp can only achieve per ...

AI Technical Summary

Problems solved by technology

The coating of the white-painted lamp tube is more resistant to high temperature, and can achieve a power of more than 80w per centimeter, but the disadvantage of the white-coated lamp tube is that the reflectivity is low

Only 65%; the other is low-temperature gold-plating, the reflectivity of gold-plated is 95%, the reflectivity is high, but the melting point of gold-plated is about 1064.43 ℃, gold-plated is not resistant to high temperature, so the gold-plated lamp can only achieve per centimeter Below 40w, no matter how high the power is, the gold will melt away