Characterization of the metatitanate systems (1-x)BaTiO3xNiTiO3 and (1-x)BaTiO3xZnTiO3 obtained by the peroxide method

It is known that metatitanates are prospective materials for the production of electronic components. In this work, two compositions of metatitanates are investigated: (1-x)BaTiO(3)xNiTiO(3) and (1-x)BaTiO(3)xZnTiO(3) with x=0.05-0.20 mol and at four sintering temperatures in the range 1100-1300 degreesC. The starting metatitanate powders are obtained by the peroxide method. The dependence of the dielectric constant and the loss tangent on the mole ratio x is investigated. The dependence of both parameters on the sintering temperature T-s is also investigated and opposite behavior is found for the two compounds. Due to the depressor character of NiTiO3 and ZnTiO3 a significant smoothing of the dependence of the dielectric constant on the ambient temperature T-a is obtained with respect to the same dependence for pure BaTiO3. It is found that compounds 0.80BaTiO(3)0.20NiTiO(3) sintered at 1300 degreesC and 0.80BaTiO(3)0.20ZnTiO(3) sintered at 1200 degreesC are prospective materials for production of high-frequency capacitors with low losses. (C) 2002 Kluwer Academic Publishers.