【摘要】 介绍了陶瓷注射成型的1种新脱脂方法———超临界流体脱蜡。利用非极性分子有机物石蜡(PW)与极性分子有机物聚丙烯(PP)及少量硬脂酸(SA)组成有机粘合剂,在压力P=40MPa,温度T=58℃的超临界CO2流体中脱脂2h,石蜡萃取率大于80%,该方法可使陶瓷注射成型脱脂时间大大减少,脱脂过程缩短到通常脱脂的1/10。另外超临界流体脱蜡明显克服了传统热脱脂的变形,开裂等各种缺陷。更多还原

【Abstract】 This paper describes a new extractio n method using supercritical carbon dioxide fruit for the debinding proc ess of ceramic injection molding.In this method,the powder is mixed with non-polar mo lecules organic materials paraffin wax(PW),polar molecules organic ma-terials polypropylene(PP)and stearic acid.Supercritical carbon dioxide extraction at 58℃and 40M Pa was used to remove the binder.The extraction yield of paraffin wax can achieve 80%after 2hours.The binder can be removed by the supercritical c arbon dioxide extraction method in short time as compared to th e thermal debinding method.Using th is method,the debinding time can be reduced to a bout one tenth.Besides,it is obvious to overcome the distortion,cracking and many kinds of defects during thermal debinding in ceramic in jection moldings.更多还原