12 April 1999 Protectively coated phosphors
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Abstract
We have developed a spraying process for coating individual phosphor particles with electrically conducting, non- conducting, and hybrid films. The phosphor is suspended in either aqueous or non-aqueous solvent containing the appropriate coating materials precursors. Depositions via gelation or precipitation of the precursor material on the particles is prevented before spraying. The suspension is sprayed into a hot zone where the coating either gels or precipitates on the particle surface in-flight. Coatings developed in-flight are more uniform than coatings developed in solution. Typical coating thicknesses of 10 to 90 nm have been achieved in a single pass. Multiple coatings are applied using multiple passes. This process is scalable to industrial sizes and is easily adaptable for coating particles for other applications.
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Guillermo R. Villalobos, Guillermo R. Villalobos, Shyam S. Bayya, Shyam S. Bayya, Jasbinder Singh Sanghera, Jasbinder Singh Sanghera, Ishwar D. Aggarwal, Ishwar D. Aggarwal, } "Protectively coated phosphors", Proc. SPIE 3636, Flat Panel Display Technology and Display Metrology, (12 April 1999); doi: 10.1117/12.344634; https://doi.org/10.1117/12.344634
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