DIELECTRIC RESONATORS IN BAO-LN(2)O(3)-5TIO(2) SYSTEM (LN=LA, PR, ND,SM)

Ceramics of composition BaO-Ln(2)O(3)-5TiO(2) have been prepared with four lanthanide elements (Ln = La, Pr, Nd, Sm) by a conventional solid state ceramic preparation route and the dielectric properties measure d in the microwave frequency range. The dielectrics had high values fo r the dielectric constant epsilon(r) in the range 72-88 and quality fa ctor Q(u) values of up to 24 000. The phase constitution and microstru ctures of the materials were characterised using X-ray diffraction and scanning electron microscopy, respectively. The observed properties i ndicate that these are promising materials for use as microwave dielec tric resonators. (C) 1996 The Institute of Materials.