The structure and properties of zinc titanate doped with strontium

Doped and undoped zinc titanate powders were prepared by a conventional solid state reaction technique using metal oxides. The characteristics of zinc titanate samples were found to depend on the heating conditions and the amounts of additions. It is shown that they are semiconductors. and the formation of SrTiO3, alpha-ZnTiO4, rutile phase, morphology roughness and open porosity increase with increasing the amounts of doped Sr. The electrical resistivities of doped and undoped zinc titanate reveal a transition from semiconductor behavior to metal-like behavior as the temperature increased. All samples represent the V-type resistivity-temperature characteristic and possess the typical PTCR characteristics above room temperature. (C) 2002 Elsevier Science B.V. All rights reserved.