High temperature reactions between molybdenum and metal halides

Á Böröczki, G. Dobos, K. Josepovits, Gy Hárs

Research output: Contribution to journalArticle

Abstract

Good colour rendering properties, high intensity and efficacy are of vital importance for high-end lighting applications. These requirements can be achieved by high intensity discharge lamps doped with different metal halide additives (metal halide lamps). To improve their reliability, it is very important to understand the different failure processes of the lamps. In this paper, the corrosion reactions between different metal halides and the molybdenum electrical feed-through electrode are discussed. The reactions were studied in the feed-through of real lamps and on model samples too. X-ray photoelectron spectroscopy (XPS) was used to establish the chemical states. In case of the model samples we have also used atomic absorption spectroscopy (AAS) to measure the reaction product amounts. Based on the measurement results we were able to determine the most corrosive metal halide components and to understand the mechanism of the reactions.

Original languageEnglish
Pages (from-to)8309-8313
Number of pages5
JournalApplied Surface Science
Volume252
Issue number23
DOIs
Publication statusPublished - Sep 30 2006

Fingerprint

Metal halides
metal halides
Molybdenum
luminaires
halides
molybdenum
Electric lamps
Metal halide lamps
Discharge lamps
Atomic spectroscopy
Caustics
Absorption spectroscopy
Reaction products
Temperature
X ray photoelectron spectroscopy
Lighting
reaction products
illuminating
Corrosion
Color

Keywords

  • AAS
  • Corrosion
  • Lamp
  • Metal halide
  • Molybdenum
  • XPS

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films
  • Condensed Matter Physics

Cite this

High temperature reactions between molybdenum and metal halides. / Böröczki, Á; Dobos, G.; Josepovits, K.; Hárs, Gy.

In: Applied Surface Science, Vol. 252, No. 23, 30.09.2006, p. 8309-8313.

Research output: Contribution to journalArticle

Böröczki, Á ; Dobos, G. ; Josepovits, K. ; Hárs, Gy. / High temperature reactions between molybdenum and metal halides. In: Applied Surface Science. 2006 ; Vol. 252, No. 23. pp. 8309-8313.
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