| Popis: |
The interfaces between (Ni,Zn)Fe 2 O 4 and MgTiO 3 as well as between MgTiO 3 and RuO 2 glass—models for the interfaces in multicomponent electroceramics—have been investigated by SEM and combined TEM/EDX analysis. Under the preparation conditions involved (1400 K, 2 h), the local properties of both interfaces are mainly thermodynamically controlled. In the case of the ferrite-titanate system, a μ m thick interface is formed, consisting of a compositionally modified, cation-exchanged spinel phase, Mg 1+ x Fe 2− 2x Ti x O 4 , with x = 0·66, and a pseudobrookite phase, Mg x Fe 2− 2x Ti 1+ x O 5 , with x = 0·75. Concerning the interface properties of MgTiO 3 -RuO 2 glass, interdiffusion of Ti and Mg appears to be the dominant process below 1100 K, whereas at higher temperature several new phases can be clearly identified in the 3 and PbTiO 3 . |
