Effect of surface treatment on the dispersion of nano zirconia particles in non-aqueous suspensions for stereolithography

By Jinxing Sun, J. Binner, Jiaming Bai. Journal of the European Ceramic Society, 2019

186 citations recorded by the source corpus.

Abstract Stereolithography (SLA) requires the creation of stable and well dispersed ceramic suspensions with high solid loading in order to achieve dense ceramic parts. Five different dispersants used were stearic acid (SA), oleic acid (OA), Disperbyk (BYK), coupling agent KH560 and variquat CC 42 NS (CC). The results indicated that BYK, KH560 and OA are all capable of creating low viscosity, well dispersed suspensions with nanozirconia particles; of these 3 wt% BYK was the best option. 3 wt% BYK treated suspensions displayed shear thinning behaviour and had a viscosity of 1680 mPa s at a shear rate of 18.6 s−1. A zirconia part was fabricated using the optimized suspension and its production followed the Beer-Lambert law. After sintering, a significant shrinkage was measured (21.9% in X–Y plane and 28.9% in Z directions), the SEM image showed the sintered part offered a high level of densification.

Subfields: Automotive Engineering, Mechanical Engineering, Orthodontics

View Paper: https://www.semanticscholar.org/paper/ddf35a41ff24eed4bfb83415d70413582debde23

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Citations in the corpus

• A comprehensive review of the photopolymerization of ceramic resins used in stereolithography (2020, background): “Among these ceramic materials, more extensive research has been conducted on the preparation of alumina [6,60,4], zirconia [61,1,62], and silica [63–65] resins.”