直写成型电极锰氧化物粉末的合成与浆料调控  

Synthesis and slurry control of manganese oxide powder for direct ink writing electrode

作　　者：何汉兵 刘真 陈勇 王小锋[2] 曾婧 HE Hanbing;LIU Zhen;CHEN Yong;WANG Xiaofeng;ZENG Jing(School of Metallurgy and Environment,Central South University,Changsha 410083,Hunan,China;School of Materials Science and Engineering,Central South University,Changsha 410083,Hunan,China)

机构地区：[1]中南大学冶金与环境学院,湖南长沙410083 [2]中南大学材料科学与工程学院,湖南长沙410083

出　　处：《化工学报》2023年第5期2239-2247,共9页CIESC Journal

基　　金：湖南省自然科学基金项目(2022JJ40591);长沙市自然科学基金项目(kq2202094);国家重点研发计划项目(2021YFB3701400)。

摘　　要：制备可适用于直写成型程序的、具有较高固相含量的浆料是提升直写成型产品质量的关键,但现有研究在浆料调控的普适规律方面仍有所欠缺。采用水热法合成了一系列尺寸可控的锰氧化物粉末,并将其用于直写成型电极,采用XRD、SEM、BET表征并分析了不同颗粒尺度对固相含量选取的规律,采用稳态流动测试了相关浆料的流变行为。结果表明,通过调节水热反应温度,锰氧化物颗粒直径呈梯度变化,1.06~1.64μm颗粒的适配固相含量随颗粒比表面积的下降而上升,46.46~91.36μm颗粒的适配固相含量随颗粒直径的上升而下降。采用该规律所配浆料进行直写成型,挤出流畅、体积收缩小、产品机械强度高。The key to improving the quality of direct writing molding products is to prepare a slurry with a high solid content that is suitable for the direct writing process,but the existing research is still lacking in the universal law of slurry regulation.In this work,a series of manganese oxide powders with controllable size were synthesized by hydrothermal method and used in direct writing electrode.The manganese oxide powder was characterized by XRD,SEM and BET,and the rules of solid content selection for different manganese oxide particle sizes were analyzed.The rheological behavior of the related slurries was tested by steady flow method.The results show that the diameter of manganese oxide particles changes in gradient by adjusting the hydrothermal reaction temperature.The suitable solid content of particles of 1.06—1.64μm increases with the decrease of particle specific surface area,while that of particles of 46.46—91.36μm decreases with the increase of particle diameter.The slurry prepared according to this rule could be direct ink writing,with smooth extrusion,small volume shrinkage and high mechanical strength.

关 键 词：锰氧化物 浆料 流变学 粉体 3D打印电极 

分 类 号：TM912[电气工程—电力电子与电力传动]