摘要
陶瓷膏体3D打印挤出成型工艺中,膏体具有低粘度,高稠度和流变性是陶瓷膏体配制需要保证的关键性能,对坯体的密度、成形精度等有较大影响,进一步影响陶瓷器件的成品率。陶瓷膏体的流变性受较多因素影响,本研究通过单因素实验和正交实验研究了固相含量、分散剂含量、pH值和球磨时间对陶瓷膏体流变性能的影响,获得了适应于3D打印挤出成型工艺流变性的A12O3陶瓷膏体,并利用得出的膏体进行打印成型实验和性能分析。研究结果表明:随着固含量的增加,膏体的粘度逐渐增加,流变性能下降。相反,随着分散剂含量和球磨时间的增加,膏体的粘度先减小后增加,而流变性能先增加后减小。另外,随着膏体pH值的升高,粘度先增大后减小,而流变性能先减小后逐渐增大。当固相含量、分散剂含量、pH值和球磨时间分别为51vol.%、0.3vol.%、3和36h时,可以获得具有较好流变性能的陶瓷膏体。
With respect to ceramic 3 Dprinting using ceramic slurry,the rheological behavior of the ceramic slurry is crucial for ensuring the qualities of the 3 D printed ceramic product,as the rheological performance exhibits great impacts on the density and forming precision of green body.Taking 3 Dprinting of Al2 O3 Ceramic Slurry as the main object,factors including solid content of A12 O3 ceramic slurry, dispersing agent, pH value and milling time were comprehensively investigated.Results indicate that the viscosity of the slurry increased gradually with the increment of the solid content;Increases of content of dispersing agent or milling time made the viscosity decreased at first and then increased dramatically.On the contrary,pH value exerted different effects on the viscosity,and it increased initially and decreased gradually with the increase of pH value.On the basis of the experiment,the optimal parameters of the rheological behavior of the ceramic slurry are that the solid content,the content of dispersing agent,pH value and milling time are 51 vol.%,0.3 vol.%,3 and 36 hrespectively,which are beneficial to the forming precision and microstructure of the 3 D printed specimens.
作者
陈劲松
晁龙
邱明波
郭建
黄大志
丁云飞
CHEN Jinsong;CHAO Long;QIU Mingbo;GUO Jian;HUANG Dazhi;DING Yunfei(Jiangsu Academy of Marine Resources Development,Jiangsu Ocean University,Lianyungang 222005,China;Electrical and Mechanical college,Nanjing University of Aeronautics&Astronautics,Nanjing 222005,China)
出处
《材料科学与工程学报》
CAS
CSCD
北大核心
2020年第2期220-225,294,共7页
Journal of Materials Science and Engineering
基金
supported National Natural Science Foundation of China(51675272)
Jiangsu Science and technology plan project(BE2019002-2)
Six talent peaks project in Jiangsu Province of China(JY-032)
521high level talents project in Lianyungang of China
Jiangsu Postgraduate Research Innovation Project(SY201705X)
Jiangsu Province 3D Printing Equipment and Application Technology Key Construction Laboratory。
关键词
流动性
陶瓷膏体
3D打印
粘度
固相含量
Flowability
Ceramic slurry
3Dprinting
Viscosity
Solids content
