Oxide and polymer-ceramic components

Group

Phosphors and optical ceramics

Topic

Rare-earth-doped strontium aluminate (excitation by ultraviolet light with a wavelength of 366 nm).

(Semi-) transparent, optical activated ceramic (YAG:Ce) excited by a blue laser pointer (450 nm wavelength).

Phosphors convert light of different wavelength into other wavelength and are used for lamps and LEDs.
In contrast, optical activated ceramics are transparent, polycrystalline materials which are also able to convert light and will be used in LEDs, Laser and detector to exchange expensive single crystals.

 

Services offered

 

  • Nanoscale phosphors by sol-gel or hydrothermal synthesis followed by calcination (e.g. rare-earth doped aluminates)
  • Pyrolysis of metal-organic precursors to inorganic materials
  • Upscaling of the synthesis to semi-industrial scale
  • Investigation of doping and particle size effects
  • After-treatment, milling, crushing, fractionation
  • Manufacture of phosphor polymer composites 
  • Determination of luminescent and phosphorescent properties

 

Technical equipment

 

  • Fully equipped chemical laboratory
  • Furnaces with controllable inert and reactive gas 
  • Ball mills for homogenization and size reduction
  • Fluorescence spectrometer

 

Applications

 

  • Processing of phosphors in fluorescent lamps, emergency floor lighting
  • Polymer composites 
  • Glass ceramics
  • Optical activated ceramics for LEDs, Laser, detectors