| 摘要 |
1. Pigments corresponding to the formula : Ce1-x-y Prx Ay Oz (I) in which : A is at least one element which may be : - a rare-earth element A1 chosen from the group consisting of the lanthanides and yttrium and/or - a transition element A2 chosen from the group consisting of the elements belonging to columns 1b, 2b, 3b, 4b, 5b, 6b, 7b and 8 of the Periodic Classification - x being a number such that 0.001 =< x =< 0.10 - y being a number such that 0 =< y =< 0.1, and - z being equal to 4 - (4-n)y/2 - n being the oxidation state of A having a single crystallographic structure isotypic with that of CeO2 and having a reflectance threshold of at least 580 nm. |
