US 12,405,237 B2
Predicting ceramic colloidal suspension stability for extrusion-based additive manufacturing
Collin C. McClain, Columbia, MD (US); and Michael P. Hunt, Columbia, MD (US)
Assigned to The Johns Hopkins University, Baltimore, MD (US)
Filed by The Johns Hopkins University, Baltimore, MD (US)
Filed on Sep. 29, 2023, as Appl. No. 18/477,718.
Claims priority of provisional application 63/386,947, filed on Dec. 12, 2022.
Prior Publication US 2024/0192156 A1, Jun. 13, 2024
Int. Cl. G01N 24/08 (2006.01)
CPC G01N 24/085 (2013.01) 20 Claims
OG exemplary drawing
 
1. A process for selecting an additive and/or solvent for a colloidal ceramic suspension, the process comprising:
measuring spin lattice T1 relaxation times by nuclear magnetic resonance for a ceramic-solvent pair, and an additive-solvent pair, wherein the solvent is selected from a plurality of different solvents, and wherein the additive is selected from a plurality of different additives;
determining a relaxation number for each of the ceramic-solvent pairs and the additive-solvent pairs from the spin lattice T1 relaxation times, wherein a higher relaxation number is indicative of strong affinity between the additive and solvent and between the ceramic and solvent; and
selecting the additive and the solvent based on the relaxation number having the highest relaxation number for the colloidal ceramic suspension.