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Microwave Dielectric Properties of BaTi 5 O 11 Ceramics Prepared by Reaction‐Sintering Process with the Addition of CuO
Author(s) -
Zhou Huanfu,
Wang Hong,
Chen Yuehua,
Li Kecheng,
Yao Xi
Publication year - 2008
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.1551-2916.2008.02623.x
Subject(s) - sintering , calcination , materials science , ceramic , dielectric , monoclinic crystal system , microwave , mineralogy , analytical chemistry (journal) , chemical engineering , metallurgy , crystal structure , catalysis , crystallography , chemistry , optoelectronics , chromatography , organic chemistry , engineering , physics , quantum mechanics
BaTi 5 O 11 microwave dielectric ceramics prepared by reaction‐sintering process were investigated. BaCO 3 was mixed with TiO 2 and CuO, sintered to form BaTi 5 O 11 ceramics without any calcination stage involved. With 1 wt% CuO addition, monoclinic BaTi 5 O 11 ceramics were produced successfully after 3–9 h sintering at 1050°–1150°C. After sintering at 1100°C for 6 h, the BaTi 5 O 11 ceramics with the density of 4.49 g/cm 3 (98.2% of the theoretical value) and good microwave dielectric properties of ɛ r =41.2, Q × f =47 430 and τ f =36 ppm/°C have been obtained. The results show that the reaction‐sintering process is a simple and effective method to produce BaTi 5 O 11 ceramics for the applications of microwave dielectric resonators.