Inventors:
Angel Sanjurjo - San Jose CA
Kai-Hung Lau - Cupertino CA
David Lowe - Hayward CA
Anastasia Canizales - San Francisco CA
Naixiong Jiang - Palo Alto CA
Victor Wong - Daly City CA
Liqiang Jiang - San Jose CA
Luke V. Schneider - Half Moon Bay CA
Naheed Mufti - Castro Valley CA
Robert T. Rewick - Mountain View CA
Marie Johansson - Watchung NJ
Keith Kardos - Bethlehem PA
Assignee:
SRI International - Mento Park CA
STC Technologies - Bethlehem PA
International Classification:
C09K 1100
Abstract:
The invention relates to a method for producing activated, substantially monodisperse, phosphorescent particles and particles formed thereby. The method suspends substantially monodisperse, phosphor-precursor particles in a fluidizing gas and then introduces a reactive gas to contact the suspended phosphor-precursor particles. Heating the suspended phosphor-precursor particles to a reaction temperature then forms unactivated phosphorescent particles. In another embodiment, the phosphor-precursor particles may be heated to a reaction temperature where they decompose to form the unactivated phosphor particles. The unactivated phosphorescent particles suspended within the fluidizing gas are activated by heating the unactivated phosphorescent particles to an activation temperature forming activated, substantially monodisperse, phosphorescent particles.