Borosilicate glass suitable for electric light source

Abstract

The invention provides glass applicable to electric light source, which belongs to the field of borosilicate glass, in particular to a high-precision small-diameter glass tube through a public known pull tube forming process by using an environment-friendly fining agent to realize good melting quality, so as to meet the requirement of electric light source mechanical light manufacture. The swell factor of the glass is (38-76) multiplies 10<-7> / DEG C to fulfill sealing of tungsten, molybdenum and raft. The glass consists of the following chemical compositions in weight percentage: 55 to 75 percent of SiO2, 5 to 22 percent of B2O3, 2 to 6 percent of Al2O3, 0 to 8 percent of MgO, CaO, BaO and SrO, 5 to 12 percent of Li2O, Na2O and K2O, 0 to 1 percent of ZrO2, 0.5 to 4 percent of TiO2, 0 to 2 percent of ZnO, 0 to 1 percent of SnO 2, and 0 to 0.5 percent of Cl2. The glass is characterized by the borosilicate glass system. The glass product has the advantages of high transmission of visible light, ultraviolet resisting property and insolation resisting property without harmful elements.

Description

technical field [0001] The invention relates to glass materials used as electric light source products (cold cathode lamps, fluorescent lamps, halogen lamps, mercury lamps, sodium lamps). The glass can achieve better melting quality through a special clarifying agent. High-precision glass tubes, glass shells, and glass covers are prepared through known tube drawing, blowing, and pressing forming processes. Background technique [0002] Human research on electric light sources began at the end of the 18th century. Along with the development of electric light sources, the varieties of electric light source glass are also in the process of continuous improvement and development. As the electric light source has entered a new era of miniaturization, energy saving, electronics, environmental protection, and long-term effect, it can only be realized if the electric light source glass keeps up with it. [0003] Existing electric light sources can be divided into three types: therm...

AI Technical Summary

Problems solved by technology

It will naturally lead to poor anti-exposure performance. At the same time, arsenic oxide and antimony oxide are also restricted glass components, which do not meet environmental protection requirements.

Electric light source glass generally needs to be thermally processed for many times in the process of making lamps. When the temperature is higher than the softening point of the glass, if sulfate is used as the clarifier, the interior of the glass will be affected by residual SO 3 And generate small bubbles, or even larger bubbles, resulting in deterioration of the strength and performance of the glass

If fluoride is used as a clarifier, it will cause greater erosion to the refractory material of the kiln, and the clarification efficiency is low, and at the same time it will cause environmental pollution

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