초록 ▼

A process for the production of metal oxide nanocrystalline phosphors activated with a rare earth, line emitting, element. The nanocrystal oxides are produced by a sol-gel like process. The process begins with an n-butoxide solution of the host and activator which is first subject to acetolysis whic

A process for the production of metal oxide nanocrystalline phosphors activated with a rare earth, line emitting, element. The nanocrystal oxides are produced by a sol-gel like process. The process begins with an n-butoxide solution of the host and activator which is first subject to acetolysis which will cause the pH of the solution to change from basic to acidic. This is followed by the addition of water in a hydrolysis step which forms a host/activator hydroxide solution. To the host/activator hydroxide solution, sodium hydroxide, which is very basic, is added, which will cause the precipitation of host oxide nanocrystals activated with the activator. The host/activator n-butoxide precursors may be synthesized by azeotropic distillation.

대표청구항 ▼

A process for producing yttrium oxide host nanocrystals having diameters of less than 100 angstroms, said nanocrystals being activated with a rare earth activator, the process comprising the steps of: a) providing a n-butoxide first solution containing yttrium and the activator in a compatible solve

A process for producing yttrium oxide host nanocrystals having diameters of less than 100 angstroms, said nanocrystals being activated with a rare earth activator, the process comprising the steps of: a) providing a n-butoxide first solution containing yttrium and the activator in a compatible solvent; b) adding acetic acid to the first solution to form a yttrium-activator acetate; c) adding water to the first solution to hydrolyze the yttrium-activator acetate to form a hydroxide compound of the yttrium and the activator; and d) adding sodium hydroxide to the solution to precipitate yttrium oxide nanocrystals activated with the activator.