离心成型制备HA陶瓷工艺中浆料的特性研究  

Study on HA Slurry Properties During Centrifugal Slip Casting Process

作　　者：李强[1] 张峰峰[1] 于景媛[1] 任飞[2] 

机构地区：[1]辽宁工业大学材料科学与工程学院,锦州121001 [2]中国人民解放军第306医院,北京100000

出　　处：《材料导报》2014年第6期128-131,共4页Materials Reports

基　　金：863计划(2011AA060102);辽宁省自然科学基金(201102090);辽宁省博士启动基金(20111068);辽宁省高等学校杰出青年学者成长计划(LJQ2012056;LJQ2013067)

摘　　要：主要研究了pH值对HA粉体Zeta电位的影响,分析了分散剂含量和浆料固相含量对HA浆料粘度的影响,研究了HA浆料的流变性和稳定性,并测量了不同工艺条件下所制备的HA生坯的密度。研究结果表明,在pH=9时,HA粉体表面的Zeta电位值达到最大,HA浆料具有良好的分散性。在分散剂含量为5%(质量分数),浆料固相含量为60%(质量分数)时,HA浆料的粘度达到最低值476.1mPa·s,HA浆料具有较好的充型能力。HA浆料具有剪切变稀特性,室温静置12h时浆料具有较好的稳定性。与干压成型相比,60%HA(质量分数)浆料离心成型所得到的生坯密度更高,更有利于HA生物陶瓷的烧结。The effect of pH on Zeta potential of HA particles was studied.The effects of the dispersant contents and the solid contents on viscosity of HA slurries were analyzed.The rheological behaviour and stability of HA slurries were studied,and the HA green densities prepared by different technologies were measured.The results show that the Zeta potential of HA particles comes to the maximum and the HA slurries have better dispersion property at pH=9.The viscosity of the HA slurry comes to the mixmum （476.1 mPa · s） at 5 wt％ dispersant and 60 wt％ solid content,and the HA slurry has better property to fill the mould.The HA slurries have shear thinning property and better stability after placing for 12 h at room temperature.Compared with dry pressing,the green compacts centrifuged with 60 wt％ slurries have the better density,which is benefit for the HA ceramic sintering.

关 键 词：HA浆料 离心成型 浆料特性 

分 类 号：TB332[一般工业技术—材料科学与工程]