TY - CONF A1 - Naghib Zadeh, Hamid A1 - Glitzky, Carsten A1 - Rabe, Torsten T1 - Co-Firing of Barium Titanate Based Capacitors with LTCC-Dielectrics, Ag-electrodes and Ferrites at 900°C T2 - Junior Euromat CY - Lausanne, Switzerland DA - 2008-07-14 PY - 2008 AN - OPUS4-20208 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Diel, W. A1 - Waßmer, M. A1 - Krüger, K. A1 - Naghib Zadeh, Hamid A1 - Rabe, Torsten T1 - Einfluss unterschiedlicher Dielektrika bei der Realisierung von Dickschichtkondensatoren im Tintenstrahldruck T2 - Deutsche IMAPS-Konferenz 2009 CY - München, Deutschland DA - 2009-10-27 KW - Tintenstrahldruck KW - Inkjet KW - High-K Keramik KW - Kondensator KW - Dickschicht KW - Bariumtitanat PY - 2009 SP - 1 EP - 8 AN - OPUS4-20613 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Naghib Zadeh, Hamid A1 - Rabe, Torsten A1 - Töpfer, J. T1 - Multikomponente-LTCC bestehend aus niedrig-sinternden X8R Kondensatorfolien, niedrig-sinternden Ferritfolien und Standard-LTCC-Basisfolien T2 - Deutsche IMAPS-Konferenz CY - Munich, Germany DA - 2010-10-12 PY - 2010 AN - OPUS4-22518 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Naghib Zadeh, Hamid A1 - Rabe, Torsten T1 - LTCC-integrierbare Kondensatorwerkstoffe auf Basis von Bariumtitanat T2 - Sitzung des Arbeitskreises "Funktionskeramik" CY - Jena, Germany DA - 2012-10-17 PY - 2012 AN - OPUS4-26703 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Töpfer, J. A1 - Hesse, J. A1 - Bierlich, S. A1 - Barth, S. A1 - Capraro, B. A1 - Rabe, Torsten A1 - Naghib Zadeh, Hamid A1 - Bartsch, H. T1 - Integration of Ni-Cu-Zn and hexagonal ferrites into LTCC modules: Cofiring strategies and magnetic properties N2 - We have studied the integration of Ni-Cu-Zn ferrite spinels as well as substituted hexagonal Co2Y-and M-type ferrites into LTCC (Low Temperature Ceramic Co-firing) modules. The cofiring behavior and the magnetic properties of these materials were investigated and evaluated for multilayer applications. Ni-Cu-Zn ferrites exhibit permeabilities of µ=300–500 for operating frequencies in the MHz range. Cu-substituted Y-type ferrites Ba2Co2-x-yZnxCuyFe12O22 in combination with sintering additives display sufficient shrinkage and densification at 900°C. A permeability of µ=10 is observed; however, substituted Co2Y-type ferrites do not exhibit long-term stability at 900°C. Co/Ti-substituted M-type ferrites BaFe12-2yCoyTiyO19 (y=1.2) with planar magneto-crystalline anisotropy exhibit excellent soft magnetic behavior. Using sintering additives, complete densification is reached at 900°C and a permeability of µ=15 and a resonance frequency of larger than 1?GHz are observed. Integration of ferrite multilayer inductor components into LTCC modules using free and constrained cofiring technologies is demonstrated. KW - Ferrites KW - Cofiring KW - LTCC modules KW - Permeability PY - 2014 UR - https://www.jstage.jst.go.jp/article/jjspm/61/S1/61_S214/_pdf DO - https://doi.org/10.2497/jjspm.61.S214 SN - 0532-8799 SN - 1880-9014 VL - 61 SP - Suppl. S1, S214 EP - S217 PB - Ky¯okai CY - Ky¯oto AN - OPUS4-31045 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Naghib Zadeh, Hamid A1 - Glitzky, Carsten A1 - Rabe, Torsten A1 - Lissner, A. ED - J.G. Herinrich, ED - C. Aneziris, T1 - Development of capacitor materials with sintering temperature below 900 °C T2 - 10th International Conference and Exhibition of the European Ceramic Society (ECerS) CY - Berlin, Germany DA - 2007-06-17 KW - Capacitor KW - LTCC KW - Barium titanate PY - 2007 SN - 3-87264-022-4 SP - 554 EP - 558 PB - Göller CY - Baden-Baden AN - OPUS4-18925 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Rabe, Torsten A1 - Glitzky, Carsten A1 - Naghib Zadeh, Hamid A1 - Oder, Gabriele A1 - Eberstein, M. A1 - Töpfer, J. T1 - Silver in LTCC - Interfacial reactions, transport processes and influence on properties of ceramics T2 - 2009 IMAPS/ACerS - 5th International Conference and Exhibition on Ceramic Interconnect and Ceramic Microsystems Technologies (CICMT) CY - Denver, Colorado, USA DA - 2009-04-21 KW - LTCC KW - Silver conductors KW - Interface KW - Sintering KW - Ferrite KW - Capacitor PY - 2009 SN - 0-930815-87-4 SP - 000085 EP - 000093 AN - OPUS4-19428 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Naghib Zadeh, Hamid A1 - Glitzky, Carsten A1 - Rabe, Torsten T1 - Low fired high-K dielectrics buried into LTCC substrates N2 - Due to addition of minor amounts of suitable additive combinations to BaTiO3 powder the sintering temperature was reduced to 900 °C. Excellent densification (more than 98% of theoretical density) and good dielectric properties were achieved after sintering at 900 °C for 2 hours. Dielectric properties can be improved by modifying the composition of sintering additives and additon of further dopants. The low sintering temperature of newly developed capacitor material allows a co-sintering with pure silver electrodes. No interfacial reaction between silver electrodes and ceramics was observed by microprobe analysis. The dielectric constants of about 1200 to 3000 and the dielectric losses of about 0.008 to 0.02 were measured (f = 1 kHz, T = 25 °C). The temperature dependency of dielectric constant for new capacitor materials is low, almost X7R characteristics. Furthermore, the densification and the dielectric properties of embedded capacitors in LTCC were investigated. T2 - 5th Ceramic Interconnect and Ceramic Microsystems Technologies Conference CY - Denver, USA DA - 2009-04-20 KW - Capacitor KW - LTCC KW - Barium titanate PY - 2009 SN - 0-930815-87-4 IS - WA 32 SP - 000188 EP - 000192 AN - OPUS4-19377 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Naghib Zadeh, Hamid A1 - Rabe, Torsten T1 - Hoch dielektrische Bariumtitanat-Werkstoffe mit LTCC kompatibler Sintertemperatur T2 - DKG-Jahrestagung u. Symposium Hochleistungskeramik CY - Hermsdorf (Thuringia), Germany DA - 2010-03-22 PY - 2010 AN - OPUS4-21141 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Naghib-zadeh, Hamid A1 - Güther, Wolfgang A1 - Rabe, Torsten T1 - High-strength and gas-tight ceramic-ceramic joints by RAB composite tapes N2 - Ceramic components with complex shape cannot be produced frequently by usual ceramic forming and sintering processes. Therefore, numerous joining methods were developed and introduced in industrial scale. Nowadays, multi-stage Mo-Mn-process and active brazing are preferentially used, if temperature-stable and gastight joints are required. Unfortunately, both processes involve cost-intensive thermal processes: hydrogenous atmosphere is essential for metallization in Mo-Mn-process and active brazing takes place under vacuum. Thermal processes can be drastically simplified by using Reactive Air Brazing (RAB). Joining under air atmosphere is an interesting alternative, especially to join oxide ceramic components among themselves. So far, main disadvantage of RAB is low strength of join connections. Aim of this investigation was the development of high-strength, thermal shock resistant and gastight ceramic-ceramic joints by RAB. Therefore, - commercial, silver and copper oxide containing RAB soldering composition was modified by addition of ceramic particles with low thermal expansion coefficients (TEC). Hence, thermal misfit between TEC of solder and ceramic components was significantly reduced. - RAB soldering paste was replaced with newly developed RAB composite tapes, produced by ceramic “doctor blade” technology. Thereby, improved potential exist to tailor the brazing layer relating to composition, thickness and thickness uniformity. Gastight alumina-alumina, alumina-zirconia and zirconia-zirconia joints with strongly improved strength were produced by novel composite tapes. No strength degradation of joints was observed after thermal cycling up to 700°C. T2 - Jahrestagung der Deutschen Keramischen Gesellschaft (DKG) 2016 CY - Freiberg, Germany DA - 07.03.2016 KW - Brazing KW - Compsite tapes KW - Ceramic-ceramc joints PY - 2016 AN - OPUS4-36114 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Naghib Zadeh, Hamid A1 - Rabe, Torsten A1 - Bechtold, F. A1 - Kaminski, S. T1 - Herstelung von Hochleistungstransformatoren durch Co-Sinterung magnetischer und dielektrischer LTCC-Folien T2 - Jahrestagung der Deutschen Keramischen Gesellschaft 2014 CY - Clausthal-Zellerfeld, Germany DA - 2014-03-24 PY - 2014 AN - OPUS4-30474 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Naghib Zadeh, Hamid A1 - Mieller, Björn A1 - Rabe, Torsten A1 - Töpfer, J. T1 - Anwendung der Master-Sinter-Kurve bei der Co-Sinterung von Werkstoffkombinationen T2 - Jahrestagung der Deutschen Keramischen Gesellschaft 2012 CY - Nuremberg, Germany DA - 2012-03-05 PY - 2012 N1 - Geburtsname von Mieller, Björn: Brandt, B. - Birth name of Mieller, Björn: Brandt, B. AN - OPUS4-25517 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -