Abstract
Modification on microwave dielectric properties of (Ba0.6Sr0.4)TiO3 (BST) materials due to the incorporation of Ba4Ti13O30 (B4T13) materials was investigated. The dielectric constant of the BST materials was lowered from KBST = 600 to KCOMP = 100, whereas the quality factor of the materials was increased markedly from (Q ×} f)BST = 80 to (Q ×} f)COMP = 2,000, due to the addition of B4T13 materials. Evanescent microwave probe (EMP) measurements indicate that the thick films prepared from the mixture contain two phases. The low-K and high-Q particulates, which are presumably B4T13 phase, are distributed uniformly among the high-K and low-Q matrix, resulting in a tunable materials with improved microwave dielectric properties.
ACKNOWLEDGEMENT
The authors would like to thank the financial support from the National Science Council of R.O.C through the project NSC 92-2216-E.32-006.