Patent ID: 11912626
Assignee: SAINT-GOBAIN CENTRE DE RECHERCHES ET D'ETUDES EUROPEEN
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC C  B  H  Y | IPC B  C  H

Claim 0:
1. A polycrystalline fused product based on brownmillerite, consisting, for more than 95% of its weight, of the elements Ca, Sr, Fe, O, M and M′, the contents of said elements being defined by the formula XyMzFetM′uO2.5, wherein the atomic indices are such that 0.76≤y≤1.10, z≤0.21, 0.48≤t≤1.10 and u≤0.52, 0.95≤y+z≤1.10, and 0.95≤t+u≤1.10, X being Ca or Sr or a mixture of Ca and Sr, M being an element chosen from the group formed by La, Ba and mixtures thereof, M′ being an element chosen from the group formed by Ti, Cu, Gd, Mn, Al, Sc, Ga, Mg, Ni, Zn, Pr, In, Co, and mixtures thereof, the sum of the atomic indices of Ti and Cu being less than or equal to 0.1.