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In-situ measurement of thickness shrinkage during pressure-assisted sintering of low temperature co-fired ceramics

  • Shrinkage measurement of miniaturized low temperature co-fired ceramics (LTCC) samples under load typically leads to a collapsing of the sample due to the softening of the glassy phase, which hampers the characterization of shrinkage up to full densification. In practical sintering processes in contrast, LTCC panels are sintered under axial loads of up to 1 MPa without lateral shrinkage or collapsing of the structure. To characterize the shrinkage behavior during such processes, a measurement setup was developed, which allows for in-situ thickness shrinkage measurements of practical, large LTCC panels during pressure-assisted sintering in a sintering press. Using this setup, the shrinkage behavior of two commercial LTCC tapes (GreenTape 951 and Ceramtape GC) has been measured under loads of up to 1 MPa. No crushing of the specimens was observed and reproducible characterization of shrinkage up to full densification has been performed. Based on comparisons toShrinkage measurement of miniaturized low temperature co-fired ceramics (LTCC) samples under load typically leads to a collapsing of the sample due to the softening of the glassy phase, which hampers the characterization of shrinkage up to full densification. In practical sintering processes in contrast, LTCC panels are sintered under axial loads of up to 1 MPa without lateral shrinkage or collapsing of the structure. To characterize the shrinkage behavior during such processes, a measurement setup was developed, which allows for in-situ thickness shrinkage measurements of practical, large LTCC panels during pressure-assisted sintering in a sintering press. Using this setup, the shrinkage behavior of two commercial LTCC tapes (GreenTape 951 and Ceramtape GC) has been measured under loads of up to 1 MPa. No crushing of the specimens was observed and reproducible characterization of shrinkage up to full densification has been performed. Based on comparisons to thermomechanical analyzer measurements in this and other studies, it is concluded that the in-situ approach is much better suited for shrinkage characterization of LTCC under load.zeige mehrzeige weniger

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Metadaten
Autoren/innen:Björn Mieller
Koautoren/innen:Torsten Rabe
Dokumenttyp:Vortrag
Veröffentlichungsform:Präsentation
Sprache:Englisch
Jahr der Erstveröffentlichung:2017
Organisationseinheit der BAM:5 Werkstofftechnik
5 Werkstofftechnik / 5.5 Technische Keramik
DDC-Klassifikation:Technik, Medizin, angewandte Wissenschaften / Ingenieurwissenschaften / Ingenieurwissenschaften und zugeordnete Tätigkeiten
Freie Schlagwörter:Low temperature; Shrinkage; Sinter/sintering
Themenfelder/Aktivitätsfelder der BAM:Material
Veranstaltung:92. DKG Jahrestagung
Veranstaltungsort:Berlin, Germany
Beginndatum der Veranstaltung:19.03.2017
Enddatum der Veranstaltung:22.03.2017
Verfügbarkeit des Dokuments:Datei im Netzwerk der BAM verfügbar ("Closed Access")
Datum der Freischaltung:27.03.2017
Referierte Publikation:Nein