Corrosion effects of MIx on ceramic arc tubes of metal halide lamps

DOI

10.2991/meic-15.2015.62How to use a DOI?

Keywords

ceramic metal halide lamps; filling compositions; corrosion areas; photometric parameters; X-ray images.

Abstract

Ceramic metal halide (CMH) lamps, filled with metal iodide (MIx), are efficient, energy saving light sources with high efficacy and high color rendering index (CRI). The biggest drawback of CMH lamps now is the corrosion on ceramic arc tubes. The corrosion effects of different MIx on the ceramic arc tubes of metal halide lamps are very important for the design of long lifetime lamps. In this paper, we studied corrosion via the molten salt in CMH lamps which is not well studied in earlier research. Sample lamps filled with NaI+DyI3, NaI+CeI3 and a control group of commercial CMH lamps with color temperature 3000 K have been aged for 10 kh in total, and the X-ray images of the arc tubes have been taken every 1 kh. The X-ray images are processed by AutoCAD 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: CeI3 > DyI3 > 3000 K commercial lamps. Besides, the effects of different filling compositions on photometric parameters of lamps are studied too, including luminous flux, efficacy, CRI and correlated color temperature.

Copyright

© 2015, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Nisheng Cai
AU  - Qiuyi Han
AU  - Shanduan Zhang
PY  - 2015/04
DA  - 2015/04
TI  - Corrosion effects of MIx on ceramic arc tubes of metal halide lamps
BT  - Proceedings of the 2015 International Conference on Mechatronics, Electronic, Industrial and Control Engineering
PB  - Atlantis Press
SP  - 261
EP  - 264
SN  - 2352-5401
UR  - https://doi.org/10.2991/meic-15.2015.62
DO  - 10.2991/meic-15.2015.62
ID  - Cai2015/04
ER  -