Abstract In this study, the effects of different binder compositions on the homogeneity of injection molded ceramic compacts are discussed from the standpoint of the rheological properties of the feedstocks, density, density deviation, and flexural strength of the as-prepared compacts, and the microstructures of the as-prepared compacts, compacts after solvent debinding, and compacts after thermal debinding. Also the pore size distribution of the compact after thermal debinding was characterized to examine the distribution of the binders in the as-prepare compacts. The feedstock with 30% macromolecular binders attains the minimum power-law index n value at 160 °C, hence it is the most appropriate feedstock for injection molding. The optimal composition is feedstock B30, which is the most homogeneous at an injection temperature of 160 °C. The macromolecular binder-to-PW weight ratio of 3:7 allows best mixing of feedstock and more homogeneous binder distribution. B30 has the highest density, the lowest density deviation and the lowest deviations in flexural strength of the as-prepared compact. Compacts prepared with B30 have the most homogenous pore size distribution after thermal debinding, as determined from the sharp, narrow peaks on the pore size distribution curves.

中文翻译：

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粘结剂成分对陶瓷注射成型坯均匀性的影响

摘要 本研究从原料的流变学特性、密度、密度偏差、抗弯强度以及微观结构等方面讨论了不同粘合剂组成对陶瓷注射成型坯均匀性的影响。制备的压坯、溶剂脱脂后的压坯和热脱脂后的压坯。还表征了热脱脂后压块的孔径分布，以检查制备的压块中粘合剂的分布。含有 30% 高分子粘合剂的原料在 160 °C 时达到最小幂律指数 n 值，因此它是最适合注塑的原料。最佳组成是原料 B30，它在 160 °C 的注射温度下是最均匀的。大分子粘合剂与 PW 的重量比为 3:7，可实现原料的最佳混合和更均匀的粘合剂分布。B30 具有最高的密度、最低的密度偏差和最低的预制压坯的弯曲强度偏差。用 B30 制备的压块在热脱脂后具有最均匀的孔径分布，这是从孔径分布曲线上尖锐而窄的峰确定的。