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Preparing Low‐Loss Low‐Temperature Cofired Ceramic Material without Glass Addition
Author(s) -
Jantunen Heli,
Rautioaho Risto,
Uusimäki Antti,
Leppävuori Seppo
Publication year - 2000
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.1151-2916.2000.tb01644.x
Subject(s) - materials science , sintering , ceramic , microstructure , microwave , composite material , mixing (physics) , dielectric , phase (matter) , electroceramics , fabrication , optoelectronics , chemistry , medicine , microfabrication , physics , alternative medicine , organic chemistry , pathology , quantum mechanics
A low‐temperature cofired ceramic (LTCC) composition for radio‐frequency purposes was accomplished without prior glass preparation. In this process, the formulation was made by mixing the glass‐forming oxides (ZnO, SiO 2 , and B 2 O 3 ) with the commercial microwave ceramic MgTiO 3 –CaTiO 3 . The sintering, microstructure, and microwave properties were compared to a formulation with exactly the same composition, but a conventional production route, including glass preparation. The novel preparation route resulted in improved firing properties of the mixture. Also, the densities, porosities, and phases of the samples were almost the same as those of the conventional samples, but the phase fractions were different. Finally, this preparation route produced better dielectric values.