Method for preparation of nanometer cerium-based oxide...

Details Method for preparation of nanometer cerium-based oxide... Method for preparation of nanometer cerium-based oxide...

2006-04-11

2006-04-11

Bos, Steven (Department: 1754)

Chemistry of inorganic compounds

Rare earth compound

C423S021100

Reexamination Certificate

active

07025943

ABSTRACT:
The invention comprises novel undoped and doped nanometer-scale CeO2particles as well as a novel semi-batch reactor method for directly synthesizing the novel particles at room temperature. The powders exhibited a surface area of approximately 170 m2/g with a particle size of about 3–5 nm, and are formed of single crystal particles that are of uniform size and shape. The particles' surface area could be decreased down to 5 m2/g, which corresponds to a particle size of 100 nm, by thermal annealing at temperatures up to 1000° C. Control over the particle size, size distribution and state of agglomeration could be achieved through variation of the mixing conditions such as the feeding method, stirrer rate, amount of O2gas that is bubbled through the reactor, the temperature the reaction is carried out at, as well as heating the final product at temperatures ranging from 150° to 1000° C.

REFERENCES:
patent: 4786325 (1988-11-01), Melard et al.
patent: 5017352 (1991-05-01), Chane-Ching et al.
patent: 5080877 (1992-01-01), Chane-Ching et al.
patent: 5712218 (1998-01-01), Chopin et al.
patent: 5938837 (1999-08-01), Hanawa et al.
patent: 5962343 (1999-10-01), Kasai et al.

Affiliated with

Also associated with

Rating

Method for preparation of nanometer cerium-based oxide... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method for preparation of nanometer cerium-based oxide..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for preparation of nanometer cerium-based oxide... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3557568