| abstract |
The invention relates to a molten product containing : - the lanthanum element (La); - optionally a (Ln) element selected from the group comprising praseodymium (Pr), neodymium (Nd), promethium (Pm), samarium (Sm), europium (Eu), ), gadolinium (Gd), terbium (Tb), dysprosium (Dy), holmium (Ho), erbium (Er), thulium (Tm), ytterbium (Yb), lutetium (Lu), yttrium (Y) and mixtures thereof, and optionally the cerium element (Ce); - a Qa element selected from the group comprising calcium (Ca), strontium (Sr), barium (Ba) and mixtures thereof; - the manganese element (Mg); - a Qb element selected from the group comprising magnesium (Mg), nickel (Ni), chromium (Cr), aluminium (Al), iron (Fe), cobalt (Co), titanium (Ti), tin (Sn), tantalum (Ta), indium (In), niobium (Nb) and mixtures thereof; - the oxygen element (O). |