關(guān)鍵技術(shù)及裝備
(清華大學(xué) 材料科學(xué)與工程系 新型陶瓷與精細工藝國家重點實驗室， 北京 100084)
摘 要: 結(jié)合注射成型和凝膠注模成型技術(shù)的優(yōu)點， 發(fā)明了陶瓷膠態(tài)注射成型技術(shù)， 實現(xiàn)了水基非塑性漿料的注射成型，并研制了膠態(tài)注射成型機， 實現(xiàn)了漿料先分儲后混合， 能連續(xù)化自動注射成型。 結(jié)果表明： 通過調(diào)節(jié)工藝中的各項參數(shù)和添加適當?shù)闹鷦?可以實現(xiàn)陶瓷漿料的可控固化；加入應(yīng)力緩釋劑調(diào)節(jié)高分子網(wǎng)絡(luò)結(jié)構(gòu)， 能有效降低坯體中的內(nèi)應(yīng)力， 制備出大尺寸陶瓷部件； 利用膠態(tài)注射成型技術(shù)與設(shè)備， 不僅能實現(xiàn)規(guī)模化大批量生產(chǎn)， 而且產(chǎn)品具有較高的可靠性，具有廣闊的應(yīng)用前景。
關(guān)鍵字: 膠態(tài)注射成型； 凝膠注模成型； 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
