Abstract A cheap and environmental friendly non-aqueous tape casting process for preparing high density ZrO 2 ceramic substrates was explored. A binary solvent mixture of ethanol and ethyl acetate -based formula was developed by using castor oil, polyvinyl butyral and dibutyl phthalate as the dispersant, binder and plasticizer, respectively. The influence of dispersant content, binder content and solid loading on the rheological properties of ZrO 2 slurries was firstly investigated. It was found that the optimized formulation for dispersant, binder and solid loading was 1 wt%, 4 wt% and 60 wt%, respectively. The flat, flexible and uniform green tapes with a thickness of 200–280 µm and high-quality including high bulk density, uniform pore distribution and low porosity were obtained. After drying and debinding, the green sheets were sintered at 1480 ℃ for 1 h, where ZrO 2 ceramics with a relative density of 98% and a dielectric constant being 32 can be achieved. The sintered samples could satisfy the use requirement of the fingerprint identification cover plate.

中文翻译：

---

优质氧化锆基材流延浆料的优化

摘要 探索了一种廉价、环保的非水流延法制备高密度ZrO 2 陶瓷基板。以蓖麻油、聚乙烯醇缩丁醛和邻苯二甲酸二丁酯为分散剂、粘合剂和增塑剂，研制了乙醇和乙酸乙酯基二元溶剂混合物。首先研究了分散剂含量、粘合剂含量和固含量对ZrO 2 浆料流变性能的影响。发现分散剂、粘合剂和固体负载的优化配方分别为1wt%、4wt%和60wt%。获得了厚度为 200-280 µm 且具有高堆积密度、均匀孔隙分布和低孔隙率等高质量的平坦、柔韧和均匀的生带。干燥脱脂后，生片在1480℃下烧结1h，可以得到相对密度为98%、介电常数为32的ZrO 2 陶瓷。烧结后的样品可以满足指纹识别盖板的使用要求。