Interfacial reaction of TiO2/NiCuZn ferrites in multilayer composites

A composite layer device incorporating TiO(2) and NiCuZn ferrites has been developed. The cofiring behavior and interfacial interaction between TiO(2)/NiCuZn ferrites at 900 degreesC were studied by using dilatometry, X-ray diffractometry (XRD), scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy (EDS). Intermediate layers were observed following the interfacial reaction between TiO(2) and PbO- or Bi(2)O(3)-doped NiCuZn ferrites. The intermediate layers were PbTiO(3) and Bi(4)Ti(3)O(12), respectively. But no intermediate layers were produced at the interface between TiO(2) and the V(2)O(5)-doped NiCuZn ferrites. The intermediate layers formed during cofiring resulted in delamination. Therefore, V(2)O(5) should be recommended as a good sintering aid for NiCuZn ferrite in preparing TiO(2)/NiCuZn ferrite composite layer devices. (C) 2003 Elsevier Ltd. All rights reserved.