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Effect of Li 2 CO 3 Addition on the Sintering Temperature and Microwave Dielectric Properties of Mg 2 V 2 O 7 Ceramics
Author(s) -
Joung MiRi,
Kim JinSeong,
Song MyungEun,
Choi JaeHong,
Sun JongWoo,
Nahm Sahn,
Paik JongHoo,
Choi ByungHyun
Publication year - 2009
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.1551-2916.2009.03179.x
Subject(s) - sintering , materials science , ceramic , monoclinic crystal system , triclinic crystal system , analytical chemistry (journal) , dielectric , mineralogy , phase (matter) , crystal structure , metallurgy , crystallography , chemistry , optoelectronics , chromatography , organic chemistry
Li 2 CO 3 was added to Mg 2 V 2 O 7 ceramics in order to reduce the sintering temperature to below 900°C. At temperatures below 900°C, a liquid phase was formed during sintering, which assisted the densification of the specimens. The addition of Li 2 CO 3 changed the crystal structure of Mg 2 V 2 O 7 ceramics from triclinic to monoclinic. The 6.0 mol% Li 2 CO 3 ‐added Mg 2 V 2 O 7 ceramic was well sintered at 800°C with a high density and good microwave dielectric properties of ɛ r =8.2, Q × f =70 621 GHz, and τ f =−35.2 ppm/°C. Silver did not react with the 6.0 mol% Li 2 CO 3 ‐added Mg 2 V 2 O 7 ceramic at 800°C. Therefore, this ceramic is a good candidate material in low‐temperature co‐fired ceramic multilayer devices.