The influence of the atomization technique on the suitability of granules for dry pressing is the focus of the presented investigations. Therefore, destabilized alumina, zirconia, and zirconia toughened alumina (ZTA) slurries were spray dried and the obtained granules were used to fabricate green and finally sintered bodies for evaluation. Granules made in a laboratory spray dryer with a two‐fluid nozzle served as a reference. An ultrasonic atomizer was integrated into the same spray dryer and the influence on the granule properties was evaluated. Untapped bulk density, granule size distribution, and flowability are among the evaluated granule‐related properties as well as the granule yield which is used as an indicator of the process efficiency. Yield and flowability as most important granule properties are clearly improved when atomization is realized with ultrasound. The investigated sinter body properties include porosity, sinter body density, and biaxial strength and are as well positively affected by switching the atomization technique to ultrasound. Therefore, the approach to improve the compressibility of granules by ultrasonic atomization, which leads to an improved microstructure, density, and strength of sintered bodies, has proven to be successful for single‐component ceramics (alumina and zirconia) as well as for the multicomponent ceramic ZTA.

中文翻译：

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通过超声波雾化推进喷雾造粒

雾化技术对颗粒对干压的适用性的影响是目前研究的重点。因此，将不稳定的氧化铝，氧化锆和氧化锆增韧氧化铝（ZTA）浆液喷雾干燥，并将所得颗粒用于制造生坯，最后烧结以进行评估。在带有两个流体喷嘴的实验室喷雾干燥器中制成的颗粒用作参考。将超声雾化器集成到同一喷雾干燥器中，并评估其对颗粒性质的影响。未评估的堆积密度，颗粒尺寸分布和流动性属于评估过的颗粒相关性能以及颗粒产量，这些指标可作为工艺效率的指标。当通过超声实现雾化时，作为最重要的颗粒性质的产率和流动性得到明显改善。所研究的烧结体性能包括孔隙率，烧结体密度和双轴强度，并且通过将雾化技术转换为超声波也受到积极影响。因此，通过超声雾化改善颗粒可压缩性的方法，从而改善了烧结体的微观结构，密度和强度，已被证明对于单组分陶瓷（氧化铝和氧化锆）以及多组分陶瓷都是成功的。陶瓷ZTA。