Figure 1 represents the variation i

Figure 1 represents the variation in viscosity of the tape casting slip against binder amount at a shear rate of 344/s. It can be seen that the slip viscosity monotonically increased with the increasing binder amount, which is in agreement with the observation by Gutierrez et al. [13]. The prepared slips had excellent stability and their rheological properties met the requirement of tape casting. The ideal binder amount was 0.84–1.44 wt% against BaTiO3 powders and experiments showed that when the binder amount was more than 1.44 wt%, the slip was too viscous to retain air in it, causing bubbles as it was poured into the casting chamber which then appears in the tape. In contrast, when the binder amount was less than 0.84 wt%, the slip flowed and spread out uncontrollably over the casting route.Therefore, a suitable viscous slip with appropriate binder amount is very important to ensure the long-term stability and quality of the final products.