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Some Halophosphates Phosphors

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Phosphate Phosphors for Solid-State Lighting

Part of the book series: Springer Series in Materials Science ((SSMATERIALS,volume 174))

Abstract

The Halophosphate phosphor is defined as a phosphor with the apatite mineral structure. Almost all commonly found tubes on the global lighting market employ an internal coating of calcium halophosphate materials (generally known simply as ‘Halophosphate’ tubes). This revolutionary material was invented in 1942 by a group led by A. H. McKeag of Osram-GEC in London, and succeeded in almost doubling lamp efficiency. This breakthrough was responsible for propelling the fluorescent business into the vast market. However, by modern standards, halophosphate materials are relatively inefficient and deliver inferior lighting quality compared to newer technologies of fluorescent phosphors. Although fluorescent tubes have low initial purchase cost, this was rapidly offset by the increased electrical power consumption required to generate a given amount of light. Owing to their lesser energy efficiency, halophosphate tubes are being phased out and shortly replaced by other more efficient fluorescent phosphor materials. These phosphors are blends of two different materials which radiate broadly in the blue and orange parts of the spectrum, respectively. By changing the ratio of the two components a full range of warm to cool white hues can be achieved.

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Authors and Affiliations

  1. Department of Physics, N.S. Science and Arts College, Bhadrawati, India

    Kartik N Shinde

  2. Department of Physics, R.T.M. Nagpur University, Nagpur, 440033, India

    S J Dhoble

  3. Department of Physics, University of the Free State, Bloemfontein, South Africa

    H C Swart

  4. Faculty of Nanotechnology and Advanced Materials Engineering, Sejong University, Seoul, 143-747, Republic of Korea (South Korea)

    Kyeongsoon Park

Authors
  1. Kartik N Shinde
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  2. S J Dhoble
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  3. H C Swart
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  4. Kyeongsoon Park
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Correspondence to Kartik N Shinde .

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© 2012 Springer-Verlag Berlin Heidelberg

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Shinde, K.N., Dhoble, S.J., Swart, H.C., Park, K. (2012). Some Halophosphates Phosphors. In: Phosphate Phosphors for Solid-State Lighting. Springer Series in Materials Science, vol 174. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-34312-4_6

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  • DOI: https://doi.org/10.1007/978-3-642-34312-4_6

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  • Publisher Name: Springer, Berlin, Heidelberg

  • Print ISBN: 978-3-642-34311-7

  • Online ISBN: 978-3-642-34312-4

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