Donghai County Fengda Quartz Products Co。, Ltd
Contact: Liu Jingli Li Jingli
Fixed telephone: 86-0518-87226108
Post Code: 222300
Address: Nanhai Development Zone, Donghai County, Lianyungang City, Jiangsu Province
UV weatherproof test chamber UV lamp material there are many, how to distinguish and choose an economical and practical UV lamp? Here we explain for you one by one the difference between the various materials:
First, the quartz glass tube material
Ultraviolet germicidal lamp (UV lamp) is actually a kind of UV resistant weather chamber Low pressure mercury lamp, and ordinary fluorescent lamp, the use of low pressure mercury vapor (<10-2Pa) was excited after the launch of ultraviolet light. General sterilization lamp lamps are made of quartz glass, because the UV weatherproof test chamber quartz glass on the ultraviolet band has a high transmittance, up to 80% -90%, is the best material to do germicidal lamp. Although quartz is expensive, all mercury vapor lamps used for UV polymerization are made of quartz, and the lamp material is made of bakelite, plastic or ceramic.
Second, high borax glass tube material
Because of the cost relationship with the use of different, but also useful UV transmittance <50% of the high borax glass tube instead of quartz glass。 High boron glass production process and energy-saving lamps, so the cost is very low, but it is better in the performance of UV weatherproof chamber than quartz glass tube to do the UV germicidal lamp, the sterilization effect is quite different。 High-boron lamp UV light intensity is easy to decay, light hundreds of hours after the UV intensity dropped significantly to the initial 50% -70%。 The quartz lamp tube ignited 2000-3000 hours, the UV intensity is only reduced to the UV resistance to the initial test chamber 80% -70%, the degree of light is far less than the high boron lamp。
Third, ordinary glass material
河北11选5开奖结果Also a higher UV light YSL UV weatherproof test chamber ordinary glass, much higher than the high boron glass, slightly lower than the quartz glass, light failure is still larger than the quartz germicidal lamp, and can not produce ozone。
Note: quartz has three important properties are very suitable for the production of UV lamp:
1, the thermal expansion coefficient is low, the purity of quartz and the presence of other trace compounds will affect the emission characteristics of the lamp.
2, transparent to ultraviolet light, do not absorb or rarely absorb UV;
3, is a bad conductor of heat; lamp is a fused silica tube, the wall thickness of about 1MM, diameter 20 ~ 25MM, arc lamp length of up to 2M, complex electrode layout (electron emitter, base, conductor ) Are sealed at both ends of the quartz tube of the UV resistant weather chamber. The quartz tube contains mercury for the firing energy and the starting gas, usually argon. When the lamp is energized, a YSL UV resistant weather test box arc is generated between the poles. As the voltage between the electrodes increases, the temperature of the gas increases, allowing the mercury to evaporate, producing mercury vapor arcs and emitting the characteristic UV light. When fully powered, the fixture also emits visible light and partial infrared light (IR).