Storage stability and rheological aging of photocurable alumina suspensions for digital light processing

Sokola, Patrik (avtor), Polívka, Benedikt (avtor), Švec, Jiří (avtor), Menčík, Přemysl (avtor), Skalar, Tina (avtor), Marinšek, Marjan (avtor), Sedlačík, Martin (avtor), Březina, Matěj (avtor), Markusík, David (avtor), Ptáček, Petr (avtor)

The long-term storage stability of photocurable alumina suspensions is a critical factor in Digital Light Processing (DLP), yet conventional sedimentation tests provide only limited information about future changes in suspension behavior. This work evaluates analytical centrifugation (LUMiSizer) as a rapid tool for assessing the stability of alumina suspensions stabilized with Disperbyk-103 and Disperbyk-111 dispersants. Rheological measurements, aging tests, and characterization of sintered specimens showed that suspensions with lower instability indices exhibited significantly smaller changes during storage and yielded more reproducible properties after sintering. In particular, the Disperbyk-111 system remained largely unchanged after 20 days of storage, whereas the Disperbyk-103 suspension underwent pronounced rheological aging accompanied by lower density and greater shrinkage after sintering. The results indicate that the instability index obtained by analytical centrifugation provides a useful screening indicator of suspension stability during storage and may serve as a practical tool for selecting dispersant formulations for DLP-based ceramic processing.

• Jezik: Angleški jezik
• Ključne besede: alumina, rheology, sedimentation, instability index, ceramic suspension, DLP printing, sintered density
• Vrsta gradiva: Članek v reviji
• Tipologija: 1.01 - Izvirni znanstveni članek
• Organizacija: FKKT - Fakulteta za kemijo in kemijsko tehnologijo
• Status publikacije: Objavljeno
• Različica publikacije: Objavljena publikacija
• Leto izida: 2026
• Št. strani: 17 str.
• Številčenje: Vol. 9, iss. 9, art. 99
• PID: 20.500.12556/RUL-188612
• UDK: 666.762.11
• ISSN pri članku: 2571-6131
• DOI: 10.3390/ceramics9090099
• COBISS.SI-ID: 290977027
• Datum objave v RUL: 24.09.2026

Gradivo je del revije

• Naslov: Ceramics
• Skrajšan naslov: Ceramics
• Založnik: MDPI
• ISSN: 2571-6131
• COBISS.SI-ID: 31835943

Licence

• Licenca: CC BY 4.0, Creative Commons Priznanje avtorstva 4.0 Mednarodna
• Povezava: http://creativecommons.org/licenses/by/4.0/deed.sl
• Opis: To je standardna licenca Creative Commons, ki daje uporabnikom največ možnosti za nadaljnjo uporabo dela, pri čemer morajo navesti avtorja.

Sekundarni jezik

• Jezik: Slovenski jezik
• Ključne besede: alumina, reologija, sedimentacija, indeks nestabilnosti, keramične suspenzije, DLP tiskanje, gostota sintranja

Projekti

• Financer: Ministry of Education, Youth and Sports of the Czech Republic
• Številka projekta: FCH-S-26-9028

• Financer: ARIS - Javna agencija za znanstvenoraziskovalno in inovacijsko dejavnost Republike Slovenije
• Številka projekta: I0-0022
• Naslov: Mreža raziskovalnih infrastrukturnih centrov Univerze v Ljubljani (MRIC UL)