关键技术及装备
(清华大学 材料科学与工程系 新型陶瓷与精细工艺国家重点实验室， 北京 100084)
摘 要: 结合注射成型和凝胶注模成型技术的优点， 发明了陶瓷胶态注射成型技术， 实现了水基非塑性浆料的注射成型，并研制了胶态注射成型机， 实现了浆料先分储后混合， 能连续化自动注射成型。 结果表明： 通过调节工艺中的各项参数和添加适当的助剂， 可以实现陶瓷浆料的可控固化；加入应力缓释剂调节高分子网络结构， 能有效降低坯体中的内应力， 制备出大尺寸陶瓷部件； 利用胶态注射成型技术与设备， 不仅能实现规模化大批量生产， 而且产品具有较高的可靠性，具有广阔的应用前景。
关键字: 胶态注射成型； 凝胶注模成型； 注射成型； 可控固化
moulding of high reliability ceramic
（State Key Laboratory of New Ceramics and Fine Processing, Department of Materials Science and Engineering, Tsinghua University, Beijing 100084, China）
Abstract:Colloidal injection moulding of ceramics (CIMC) is a new ceramic forming technique, which combines the advantages of gel-casting and injection moulding. It can inject aplastic slurry into the mould. The equipment of CIMC was designed and produced. The results show that all kinds of fectors which effect solidification of slurry is studied and then we can control solidification course. Internal stress of green body is also studied and large-size ceramic component can be got by adding moderator. So high performance ceramics with complex shape is manufactured by CIMC technique with high reliability, high automation and low cost.
Key words: colloidal injection moulding; gel-casting; injection moulding; controllable solidification
