Dielectric ceramics with boundary-layer structure for high frequency application

1 February 1972

journal article
research article
Published by Taylor & Francis in Ferroelectrics

Vol. 3 (1) , 315-319
https://doi.org/10.1080/00150197208235323

Abstract

Boundary-layer dielectric ceramics are characterized by the peculiar structure that every constituent semiconductive grain is covered with thin insulating layer which is formed by diffusion of metal oxide and oxygen. The boundary-layer ceramics made from barium titanare exhibit excellent dielectric properties but show a dielectric dispersion near 30 MHz. New type of boundary-layer dielectrics feasible in higher frequency range made from (Ba, Sr)TiO3 solid solution system are presented. Dielectric constant and dielectric loss at 1 KHz for typical (Ba, Sr)TiO3 boundary-layer dielectrics was 104to 2 × 104 and 3% to 6%. Specific resistivity for the ceramics of 0.6 mm thickness was 1010Ω. cm at 200 V/cm. Dielectric dispersion frequency extended to GHz range.

Keywords

This publication has 2 references indexed in Scilit:

Barrier-layer dielectrics
Proceedings of the IEE - Part B: Electronic and Communication Engineering, 1962
A Note on the Dielectric Dispersion in Polycrystalline Materials
Proceedings of the Physical Society. Section B, 1951