Multilayer low temperature co-fired M-type barium hexaferrites and BaO·(Nd1−xBix)2O3·4TiO2 dielectric ceramics

LTCC-technology for Producing Hexaferrites

“…Thus, this temperature can be used to calcine the mixed oxide precursor. Behavior shrinkage Ba(Co,Ti)xFe12 -2xO19 (x  1,2) magnetic ceramics samples with content and without content BBSZ-glasses during thermal treatment are shown in the work [1]. The relationship between linear shrinkage levels of shrinkage and heat treatment temperature are shown in Fig.…”

“…The relationship between linear shrinkage levels of shrinkage and heat treatment temperature are shown in Fig. 2 [1]. Magnetic ceramics samples with the addition of BBSZ-glasses had lower starting temperature shrinkage indicates the initial sintering stage than the sample without glasses content.…”

“…Integration of induction coils, capacitors and resistors in one small monolithic chip provides better performance and saves space with a higher level of integration on a printed circuit. Multicompound multilayer co-fired materials from soft magnetic material with high magnetic permeability and a dielectric mate-rial with a high dielectric constant at high frequencies, provide co-fired capacitor and inductor coil, and are one of the most interesting, but sophisticated approaches [1]. Mismatch compaction kinetics, chemical reactions and mismatch thermal expansion between the layers can generate undesirable defects such as delamination, crack, collapse and reduce performance secondary phase [2][3][4].…”

Applying the ltcc-technology to obtain hexaferrites for base layers of microstrip shf devices

“…Multilayer devices based on the low temperature cofired ceramics (LTCC), prepared from the alternating layers of ceramics and internal electrode, were widely examined for the miniaturization of devices [5][6][7]. Silver (Ag), as a rule, is used as the internal metal electrode in the LTCC multilayer devices because of its low losses and low electric resistance at high frequencies.…”