HIGH PERMITTIVITY AND LOW-LOSS CERAMICS IN THE BAO-SRO-NB2O5

Citation
H. Sreemoolanadhan et al., HIGH PERMITTIVITY AND LOW-LOSS CERAMICS IN THE BAO-SRO-NB2O5, Materials research bulletin, 30(6), 1995, pp. 653-658
Citations number
18
Categorie Soggetti
Material Science
Journal title
ISSN journal
00255408
Volume
30
Issue
6
Year of publication
1995
Pages
653 - 658
Database
ISI
SICI code
0025-5408(1995)30:6<653:HPALCI>2.0.ZU;2-W
Abstract
A new group of compounds with composition (Ba5-xSrx)Nb4O15, having hig h permittivity and low loss have been prepared and characterised in th e microwave frequency region. X-ray diffraction studies showed that mo nophase compound existed for all values of x from 0 to 5. Microwave di electric properties such as epsilon(r) and tau(f) showed smooth variat ion with x, while the unloaded quality factor (Q(u)) showed remarkable improvement with x. A range of ceramic dielectric resonators(DR) with 40< epsilon(r) <50,-10<tau(f)<+10 and Q x f>10,000 can be obtained in this system.