Liquid suspension and powder of cerium oxide particles,...

C - Chemistry – Metallurgy – 09 – K

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

C09K 3/14 (2006.01) C01F 17/00 (2006.01) C09G 1/02 (2006.01)

Patent

CA 2734354

The invention relates to a suspension of cerium oxide particles, of which the particles (secondary particles) have an average size of at most 200 nm, these secondary particles consisting of primary particles whose average size measured by TEM is of at most 150 nm with a standard deviation of at most 30% of the value of said average size, and for which the ratio of the average size measured by TEM to the average size measured by BET is at least 1.5. This suspension is prepared from a solution of a cerium III salt, comprising a colloidal dispersion of cerium IV, which is brought into contact, in the presence of nitrate ions and under an inert atmosphere, with a base; the medium obtained is subjected to a thermal treatment under an inert atmosphere and then acidified and washed. The suspension can be used for polishing.

L'invention concerne une suspension de particules d'oxyde de cérium dont les particules (particules secondaires) présentent une taille moyenne d'au plus 200 nm, ces particules secondaires étant constituées de particules primaires dont les tailles mesurées par MET présentent une valeur moyenne d'au plus 150 nm avec un écart type dont la valeur est d'au plus 30% de la valeur de ladite taille moyenne et pour lesquelles le rapport de la taille moyenne mesurée par MET à la taille moyenne mesurée par BET est d'au moins 1,5. Cette suspension est préparée à partir d'une solution d'un sel de cérium III, comprenant une dispersion colloïdale de cérium IV, qui est mise en contact en présence d'ions nitrates et sous atmosphère inerte avec une base; le milieu obtenu est soumis à un traitement thermique sous atmosphère inerte puis acidifié et lavé. La suspension peut être utilisée pour le polissage.

LandOfFree

Say what you really think

Search LandOfFree.com for Canadian inventors and patents. Rate them and share your experience with other people.

Rating

Liquid suspension and powder of cerium oxide particles,... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Liquid suspension and powder of cerium oxide particles,..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Liquid suspension and powder of cerium oxide particles,... will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFCA-PAI-O-1958277

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.