C - Chemistry – Metallurgy – 01 – B
Patent
C - Chemistry, Metallurgy
01
B
C01B 25/45 (2006.01) C09K 11/77 (2006.01) C09K 11/81 (2006.01)
Patent
CA 2741980
The invention relates to a rare earth element phosphate (Ln), where Ln is either at least one rare earth element selected from cerium and terbium, or lanthanum in combination with at least one of the above two rare earth elements, having a crystalline structure of the rhabdophane type or of the monazite type with a lithium content of 300 ppm at most. The phosphate is obtained by the precipitation of a rare earth element chloride at a constant pH lower than 2, and then calcining and redispersing the same in hot water. The invention also relates to a phosphor obtained by calcining the phosphate at at least 1000°C.
Le phosphate de terre rare (Ln) de l'invention, Ln représentant soit au moins une terre rare choisie parmi le cérium et le terbium, soit le lanthane en combinaison avec au moins l'une des deux terres rares précitées, présente une structure cristalline soit de type rhabdophane soit de type monazite la teneur en lithium étant d'au plus 300 ppm. Le phosphate est obtenu par précipitation d'un chlorure de terre rare à pH maintenu constant inférieur à 2 puis calcination et redispersion dans l'eau chaude. L'invention concerne aussi un luminophore obtenu par calcination à au moins 1000°C du phosphate.
Buissette Valerie
Le-Mercier Thierry
Rhodia Operations
Robic
LandOfFree
Cerium and/or terbium phosphate, optionally with lanthanum,... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Cerium and/or terbium phosphate, optionally with lanthanum,..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Cerium and/or terbium phosphate, optionally with lanthanum,... will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-1963644