Method for producing rare earth activited metal oxide nanocrysta

Details Method for producing rare earth activited metal oxide nanocrysta Method for producing rare earth activited metal oxide nanocrysta

1996-03-18

1997-06-10

Bonner, Melissa

Compositions

Inorganic luminescent compositions

Compositions containing halogen; e.g., halides and oxyhalides

2523014F, 2523016R, 423263, 423604, 423608, 423622, C01F 1700, C09K 1177, C09K 1154

Patent

active

056372582

ABSTRACT:
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.

REFERENCES:
patent: 4507245 (1985-03-01), Ozaki et al.
patent: 4968498 (1990-11-01), Wautier et al.
patent: 5106828 (1992-04-01), Bhargava et al.
Organic Chemistry A Short Course; Hart, ed., 1991 no month.

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