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研究生:林雍熙
研究生(外文):Yung-Hsi Lin
論文名稱:進料配方對擠出成型胚體之影響
論文名稱(外文):Effects of formulation on the forming properties during extrusion
指導教授:王錫福
指導教授(外文):Sea-Fue Wang
口試委員:林於隆吳玉娟徐永富
口試日期:2012-05-17
學位類別:碩士
校院名稱:國立臺北科技大學
系所名稱:材料科學與工程研究所
學門:工程學門
學類:材料工程學類
論文種類:學術論文
論文出版年:2012
畢業學年度:100
語文別:中文
論文頁數:61
中文關鍵詞:氧化鋁擠出成型黏結劑機械性質
外文關鍵詞:AluminaExtrusion moldingAdhesiveMechanical properties
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本實驗利用不同粒徑的氧化鋁來做起始粉末,加入以甲基纖維素為主的水性黏結劑,利用擠出成型法製作氧化鋁管,觀察其擠出成型外觀、燒結後微結構、燒結密度、機械性質。
本研究發現,不同粒徑的氧化鋁粉末添加不同比例的黏結劑、潤滑劑、分散劑及水分,會對整個生胚成型性有很大的影響,當黏結劑添加少於3.8 wt%時,固含量77%以上時,無法順利擠出成型,而改變潤滑劑的含量時,添加量在2.3 wt%以下時則無法有效的潤滑粉體表面,而造成擠出時管壁彎曲破裂,分散劑含量少於1.5 wt%時會因為粉體與添加劑無法有效分散及包覆粉體表面而造成胚體的強度不足容易斷裂,水分含量少於20.0 wt%時會造成高分子添加劑的分子鏈無法有效的潤濕進而無法完全吸附在粉體表面,因此無法順利捏合成團。


In this experiment, the initial powder was made of aluminium oxide of different particle sizes. A water-soluble binder that mainly contained methyl cellulose (MC) was added into the powder, and the extrusion molding method was utilized in order to make alumina tubes. By this method, the extrusion molding appearance, the microstructure after sintering, the sintered density, and the mechanical properties were observed and analyzed.
This research discovered that the molding process of a green compact would be significantly influenced by adding different proportions of binder, lubricant, dispersant, and water.
When the added binder was less than 3.8 wt% with 77% solid content, it would result in the failure of extrusion molding. When the lubricant was less than 2.3 wt%, it would cause the inefficiency of lubricating the powder surface, as well as the rupture of the tube wall.

When the dispersant was less than 1.5 wt%, the compact could be easily broken due to the fact that the powder and the addictive failed to effectively disperse and coat the powder surface.
When the proportion of water was less than 20.0 wt%, it would result in the inability of the macromolecule addictive. Because the molecular chain of the addictive did not have enough water to be completely expanded, it could not fully attach to the powder surface, thus causing the failure of extrusion molding.



摘 要 i
ABSTRACT ii
致 謝 iv
目 錄 v
表目錄 vii
圖目錄 viii
第一章 序論 1
1.1 前言 1
1.2 研究目的 2
第二章 文獻回顧與理論基礎 3
2.1 擠出漿料製程 3
2.1.1 黏結劑 3
2.2分子量高低的黏結劑對擠出成型影響 8
2.3以Boehmite為溶劑對擠出成型影響 10
2.4以Cordierite漿料的擠出行為 13
2.5氧化鋁塑料的懸浮凝固現象 15
2.6甲基纖維素吸附作用 16
2.7擠出漿料的排水現象 17
2.8 多孔質氧化鋁的製備與性質 18
2.9 不同粒徑的流變行為 19
第三章 實驗步驟與方法 20
3.1 實驗材料與耗材 20
3.2 實驗流程 25
3.3 實驗設備及分析 28
3.3.1 XRD繞射儀 28
3.3.2 雷射粒徑分析儀 29
3.3.3 掃描式電子顯微鏡 29
3.3.4 密度量測 31
3.3.5 三點抗彎測試 31
第四章 結果與討論 33
4.1改變黏結劑對生胚成型之影響 33
4.1.1密度量測分析 38
4.1.2顯微組織分析 39
4.1.3抗折強度分析 42
4.2改變潤滑劑對生胚成型性之影響 43
4.2.1密度量測分析 47
4.2.2顯微組織分析 48
4.3改變分散劑對生胚成型性之影響 50
4.3.1密度量測分析 54
4.3.2顯微組織分析 55
4.4改變水分對生胚成型性之影響 57
4.5不同粒徑對擠出成形的影響 58
第五章 結論 59


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