陶瓷金卤灯中稀土碘化物对陶瓷管壁的腐蚀研究  

Corrosion Effects of MIx on Ceramic Arc Tubes of Metal Halide Lamps

作　　者：蔡倪胜 李炜[1] 周振民 魏颖东 韩秋漪[1] 张善端[1] 

机构地区：[1]先进照明技术教育部工程研究中心复旦大学电光源研究所,上海200433 [2]上海亚明照明有限公司,上海201801

出　　处：《中国照明电器》2015年第10期1-6,共6页China Light & Lighting

基　　金：上海张江国家自主创新示范区国际技术转移转化运营试验区项目(ZJ2014-ZD-011)资助

摘　　要：陶瓷金卤灯是1种高效节能的气体放电光源,目前其最大的技术瓶颈是金属卤化物对陶瓷管壁腐蚀的问题。针对前人研究较少的液相腐蚀,重点研究金属卤化物熔盐对陶瓷管壁的腐蚀程度。选取了5种陶瓷金卤灯中常用的稀土碘化物和Na I组成双碘化物填充组分,并准备两款商用灯作为参照组。各组样灯分为竖直和水平两种燃点方式进行统一老炼,总计进行了10 kh的燃点。每隔1 kh对样灯的电弧管进行X光透射分析,并在Auto CAD软件中对X光图像进行处理,计算出腐蚀面积。通过比较各组样灯腐蚀面积随燃点时间的变化,得到了实验中稀土碘化物对陶瓷管壁的腐蚀严重程度排序:Ce I3>Dy I3>Tm I3>Ho I3。此外,结合电弧管壁的温度分布解释不同燃点方式的样灯中腐蚀发生部位不同的问题。Ceramic metal halide（CMH） lamps filled with metal iodide（MIx） are energy saving light sources with high efficacy and high color rendering index（CRI）. The bottleneck of CMH lamps now is the corrosion of the ceramic arc tubes. This paper focuses on the liquid phase corrosion level study of the molten salt to the CMH lamps which has not been frequently considered in earlier researches. Sample lamps filled with Na I＋Dy I3, Na I＋Ho I3, Na I＋Tm I3, Na I＋Ce I3, Na I＋Tl I and two control groups of commercial CMH lamps with color temperature of 3 000 K and 4 200 K were aged with the same operating mode of vertical and horizontal for 10 kh in total, and the X-ray images of the arctubes were taken each 1 kh. The X-ray images were processed by Auto CAD in order to calculate the corrosion areas. By comparing the corrosion areas, we have found the sequence of corrosion speed of MIx in this experiment is： Ce I3〉Dy I3〉Tm I3〉Ho I3. Besides, the different corrosion phenomenon in vertically-burnt lamps and horizontally-burnt lamps are explained according to the temperature distribution of arc tube walls.

关 键 词：陶瓷金卤灯 液相腐蚀 X光图像 腐蚀面积 温度分布 

分 类 号：TM923.3[电气工程—电力电子与电力传动]