セラミックス成形助剤混合材料のキャピラリー内面のすべりと粘度測定法に関する研究
Method of Measuring Capillary Surface Slip Property and Viscosity of Ceramic-Binder Compound
加藤和典・鄭 湧皓・大竹尚登
Kato, Kazunori / Chung, Yongho / 0take, Naoto
Capillary flow experiments were performed to evaluate the slip property of injection moldable ceramic compounds of Al2O3, and the following results were obtained. Firstly, slip velocity us was obtained by applying the Mooney method, and the effects of material temperature, particle size and binder composition on the slip velocity were evaluated. Secondly, it was found that the slip velocity changed significantly, when counter pressure was applied at the exit of the capillary. Then, the slip velocity was expressed by an empirical equation considering the pressure effect. Thirdly, an accurate viscosity equation was obtained, based on the pressure dependent slip behavior. Lastly, the flow behavior in a capillary was discussed in consideration of the slip behavior, and the application of counter pressure was found to be effective for realizing high strain rate flow.
Key words: Ceramic-binder compound / Measurement of viscosity / Slippage at capillary surface / Pressure effect