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材料工程  2018, Vol. 46 Issue (11): 84-89    DOI: 10.11868/j.issn.1001-4381.2017.000649
  研究论文 本期目录 | 过刊浏览 | 高级检索 |
微滴喷射快速成形Al2O3陶瓷微球的性能
蔡基利1, 吴和保1, 刘富初2, 樊自田2
1. 武汉工程大学 机电工程学院, 武汉 430205;
2. 华中科技大学 材料成形与模具技术国家重点实验室, 武汉 430074
Properties of Al2O3 Ceramic Microspheres Prepared by Micro-droplet Jetting Rapid Forming
CAI Ji-li1, WU He-bao1, LIU Fu-chu2, FAN Zi-tian2
1. School of Mechanical & Electrical Engineering, Wuhan Institute of Technology, Wuhan 430205, China;
2. State Key Laboratory of Materials Processing and Die & Mould Technology, Huazhong University of Science and Technology, Wuhan 430074, China
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摘要 为了快速地制备出粒径可控的氧化铝陶瓷微球,设计一种基于微滴喷射技术和浆料固化成形技术的陶瓷微球快速成形装置,可快速成形粒径可控的陶瓷微球坯体。采用该快速成形装置,以氧化铝粉末为原材料、聚乙烯醇(PVA)为黏结剂和硼酸为固化剂制备Al2O3陶瓷微球。研究不同陶瓷浆料组成参数对陶瓷微球坯体成形性的影响,分析喷嘴直径大小和浆料挤出压力对陶瓷微球粒径的影响,以及烧结温度对Al2O3陶瓷微球性能的影响。结果表明:当氧化铝粉末、PVA和硼酸的质量分数分别为70%,3%和10%时,陶瓷微球坯体的球形度高、成形性较佳;可采用不同的喷嘴针头直径大小和浆料挤出压力制备出不同粒径大小的陶瓷微球,实现陶瓷微球粒径的可控性;当烧结温度为1400℃时,Al2O3陶瓷微球粒径分布均匀、球形度优于1.08、显气孔率为43.7%、相对密度为82.1%、压溃强度为76.5N,此时陶瓷微球的综合性能最佳。
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蔡基利
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樊自田
关键词 微滴喷射技术陶瓷微球氧化铝球形度粒径分布    
Abstract:To rapidly prepare the alumina ceramic microspheres with control of particle size, a ceramic microsphere rapid forming equipment based on droplet jetting technology and slurry curing technology was designed. The Al2O3 microspheres were prepared by using the rapid forming device with alumina powder as raw material, polyvinyl alcohol (PVA) as a binder and boric acid as a curing agent. The effect of different slurry composition parameters on the formability of green body was investigated. The effect of nozzle diameter and slurry extrusion pressure on the particle size of Al2O3 microspheres was studied. The effect of sintering temperature on the properties of Al2O3 microspheres was analyzed and compared. The results show that when the mass fraction of alumina powder, PVA and boric acid are respectively 70%, 3% and 10%, the green body of Al2O3 microspheres have high sphericity and better formability. The controllability of the particle size distribution can be achieved by adjusting nozzle size and slurry extrusion pressure. Ceramic microspheres possess the best comprehensive property, when sintered at 1400℃, the particle size of Al2O3 microspheres is uniform, the sphericity is about 1.08, the porosity is 43.7%, the relative density is 82.1%, and the crush load is up to 76.5N.
Key wordsdroplet jetting technology    ceramic microspheres    alumina    sphericity    size distribution
收稿日期: 2017-05-24      出版日期: 2018-11-19
中图分类号:  TQ174.6  
基金资助: 
通讯作者: 吴和保(1963-),男,教授,博士,主要研究方向为金属凝固理论及其数值模拟、金属表面处理与防护、液态金属精确成型、金属雾化制粉、材料自动化检测与控制,E-mail:wu_hust@163.com     E-mail: wu_hust@163.com
引用本文:   
蔡基利, 吴和保, 刘富初, 樊自田. 微滴喷射快速成形Al2O3陶瓷微球的性能[J]. 材料工程, 2018, 46(11): 84-89.
CAI Ji-li, WU He-bao, LIU Fu-chu, FAN Zi-tian. Properties of Al2O3 Ceramic Microspheres Prepared by Micro-droplet Jetting Rapid Forming. Journal of Materials Engineering, 2018, 46(11): 84-89.
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http://jme.biam.ac.cn/CN/10.11868/j.issn.1001-4381.2017.000649      或      http://jme.biam.ac.cn/CN/Y2018/V46/I11/84
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