1989 Volume 97 Issue 1127 Pages 706-709
As barium titanate series dielctric ceramics is ferroelecricity, the decline of the capacitance occurred caused in applying high voltage by the material's characteristics of voltage dependent. It was already reported that a present material, which had been developed from (Sr, Ba)TiO3 series ceramics, had a high dielectric constant and moreover is little under the influence of its voltage dependent characteristics. However, for the CRT circuit, etc. operated by DC high voltage, it has been required that the capacitor material have not to be at all under the influence of voltage dependent characteristic, or rather enhance capacitance in applying voltage. Completing the requirement, a new material from (Sr, Ca, Pb)TiO3 series ceramics was developed. The explanation of the author's fundamental way of thinking in developing the new material, and the study on the electric characteristics and the microstructure of the material, are discussed in this paper.
