New high permittivity and low loss ceramics in the BaO-TiO2-Nb2O5 composition

Authors
Ratheesh, R Sreemoolanadhan, H Suma, S Sebastian, MT Jose, KA Mohanan, P
Citation
R. Ratheesh et al., New high permittivity and low loss ceramics in the BaO-TiO2-Nb2O5 composition, J MAT S-M E, 9(4), 1998, pp. 291-294
Citations number
16
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science","Material Science & Engineering
Journal title
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
ISSN journal
09574522 → ACNP
Volume
9
Issue
4
Year of publication
1998
Pages
291 - 294
Database
ISI
SICI code
0957-4522(199808)9:4<291:NHPALL>2.0.ZU;2-V
Abstract
New dielectric ceramics with formula BaTi3Nb4O17 and Ba6Ti14Nb2O39 have bee n prepared and characterized. BaTi3Nb4O17 was densified to 92% of TD after firing at 1310 degrees C for 4 h. However, Ba6Ti14Nb2O39 fired under optimi zed conditions (1260 degrees C for 4 h) showed only 85% TD together with se condary phase. The crystal system of both of the compositions is orthorhomb ic. The BaTi3Nb4O17 has epsilon(r) similar to 56, Q(u) similar to 2100 (at 4.402 GHz), tau(f) similar to +86 p.p.m. K-1 and Ba6Ti14Nb2O39 as epsilon(r ) similar to 50, Q(u) similar to 650 (4.359 GHZ) and tau(f) similar to +165 p.p.m. K-1. (C) 1998 Kluwer Academic Publishers.