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Effect of Nb 2 O 5 /ZnO Addition on Microwave Properties of (Zr 0.8 Sn 0.2 )TiO 4 Ceramics
Author(s) -
Park Yong Hwan,
Ryu Ji Man,
Shin Moo Young,
Ko Kyung Hyun,
Kim Dong Wan,
Hong KugSun
Publication year - 2001
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.2001.tb01050.x
Subject(s) - ceramic , dielectric , materials science , relative density , analytical chemistry (journal) , zinc , microwave , mineralogy , metallurgy , chemistry , microstructure , optoelectronics , chromatography , physics , quantum mechanics
The effects of Nb 2 O 5 and ZnO addition on the dielectric properties, especially the quality factor, of (Zr 0.8 Sn 0.2 )TiO 4 (ZST) ceramics were investigated in terms of the sintered density acquired by the zinc. For ZST ceramics with 2 mol% added ZnO, the relative density of the samples decreased with >0.5 mol% addition of Nb 2 O 5 . On the other hand, for samples with 6 mol% added ZnO, the relative density remained >97%, even when the amount of Nb 2 O 5 was increased to 2.0 mol%. When >0.5 mol% Nb 2 O 5 was added, both the quality factor and the dielectric constant exhibited similar trends with sintered density. The ZST ceramics with 6 mol% added ZnO, especially, still manifested a quality factor >40 000 and a dielectric constant of 37, even when the amount of Nb 2 O 5 was increased, values that are not explainable by the previously suggested electronic defect model.