界面活性劑對氧化鋁粉末射出成形流變行為之影響

Effect of Surfactant on Rheological Behavior of Alumina Powder Injection Molding

余華偉(H. W. Yu) ； 黃國鋒(K. F. Huang) ； 黃啟祥(C. S. Hwang)

《材料科學與工程》 34卷2期 (2002/06) Pp. 93-99

https://doi.org/10.6409/JMSE.200206.0093

摘要

塑料的流變性質直接影響陶瓷射出成形體的性質。在主成份粉末固定下，塑料的流變性質會依黏結劑的選擇、添加方法、添加順序的不同而有所差異。本研究旨在探討界面活性劑在其他黏結劑系統固定下，其對氧化鋁塑料流變性質的影響。實驗結顯示，塑料的黏度是隨著界面活性劑硬脂酸添加量的增加及溫度的升高而減少；且於150ºC以下時，塑料黏度會突然增大。於160ºC之參考溫度及1000s的負一次方之參考剪應變速率之情況下，預先披覆4g硬脂酸/100g氧化鋁之塑料有最高之流變指數αstv=6.23，即是最適合作為射出成形的塑料。

關鍵字

氧化鋁 ； 射出成形 ； 流變行為 ； 塑料

並列摘要

The rheological behavior is the main effect of the characteristics of injection molding specimens. When the major compositions of powder are fixed, the rheological behavior is affected with the factors, such as selected binder system, added method and added sequence. In this study, the binder compositions are fixed and effect of surfactant on the rheological behavior of alumina feedstocks is investigated. The results show that the viscosity of the feedstock is decreased with the increasing of surfactant (stearic acid) contents, which is also decreased with the increasing of temperature. The viscosity of feedstocks is increased rapidly while the temperature is lower than 150ºC. Taking 160ºC as a reference temperature and 1000s-1 as a reference shear rate, the feedstock of pre-coated 4.0g SA/100g Al2O3 has a highest general rheological index αstv=6.23. Therefore, it is the most suitable feedstock for injection molding.

並列關鍵字

Alumina ； Injection molding ； Rheological behavior ； Feedstock