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Ultra‐Low‐Fire Zn 2 Te 3 O 8 –TiTe 3 O 8 Ceramic Composites
Author(s) -
Wang SeaFue,
Hsu YungFu,
Wang YuhRuey,
Sung ChuanChun
Publication year - 2011
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.1551-2916.2010.04170.x
Subject(s) - ceramic , materials science , dielectric , sintering , composite material , temperature coefficient , microstructure , mineralogy , analytical chemistry (journal) , chemistry , optoelectronics , chromatography
In this study, ceramic composites of the Zn 2 Te 3 O 8 –TiTe 3 O 8 system were adopted to improve the dielectric properties of the ultra‐low‐fire single‐phase Zn 2 Te 3 O 8 . The ceramic composites were densified at 600°C. The X‐ray diffraction results show no interaction between Zn 2 Te 3 O 8 and TiTe 3 O 8 during sintering. Granular grains in the range of 1–5 μm were observed, and the microstructural evolution was nearly independent of the TiTe 3 O 8 content. Owing to the inertness between Zn 2 Te 3 O 8 and TiTe 3 O 8 ceramics, the dielectric constant (ɛ r ) and the temperature coefficient of resonant frequency (τ f ) increased nearly linearly, while the quality factor ( Q × f ) decreased with the content of TiTe 3 O 8 in the Zn 2 Te 3 O 8 ceramic. The Zn 2 Te 3 O 8 –30 wt% TiTe 3 O 8 ceramic composite sintered at 600°C reported the best dielectric properties with an ɛ r of 19.8, a Q × f of 50 042 GHz (at a measurement frequency of 11.8 GHz), and a τ f of 3.0 ppm/°C, qualifying the ultra‐low‐fire composites for use in ceramic resonators.