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研究生:洪誠一
研究生(外文):Chen-Yi Hung
論文名稱:塑化劑對鈦酸鋇漿體流變行為與刮刀成型薄帶特性研究
論文名稱(外文):Effects of Plasticizers on the Rheological Behavior of the BaTiO3 Slurry and the Properties of the Green Tape
指導教授:王玉瑞王玉瑞引用關係王錫福
口試委員:陳志榮吳玉娟徐永富
口試日期:2008-07-10
學位類別:碩士
校院名稱:國立臺北科技大學
系所名稱:資源工程研究所
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:2008
畢業學年度:96
語文別:中文
論文頁數:88
中文關鍵詞:塑化劑MLCC刮刀成型法
外文關鍵詞:plasticizerMLCCtape casting
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近幾年來,隨著MLCC產業邁向電容器尺寸的微小,製造超薄的薄帶的課題變的很重要,而刮刀成型法為一個基本且簡單製造薄層陶瓷薄帶的方法。高品質的薄帶需具有一些條件,例如,乾燥的過程中不產生缺陷、均勻的微結構、高機械特性、良好的熱壓能力以及容易脫脂。
本實驗以P1與P2兩種不同的塑化劑,製備以B1為黏結劑的非水系漿體,探討影響鈦酸鋇漿體的流變行為及機械特性的機制、薄帶的熱壓合性質,以及研究黏結劑與塑化劑的混合物的熱裂解行為。實驗結果發現,添加塑化劑的漿體表現較佳的流變特性,例如低的黏度、較低的觸變性等,並且薄帶的上下表面與斷面具備較為均勻的微結構;添加塑化劑的薄帶會減少它的拉伸強度,但是會增加它的伸長率以及與底膜的黏附性;而未添加塑化劑的薄帶呈現典型脆性的行為,而且不具有熱壓合工作性。低塑化的薄帶在疊壓的製程當中,發生了不黏合的現象;後續的燒除製程當中,塑化劑會於接近其熱裂解溫度燒除,不會影響到剩餘高分子混合物的熱裂解溫度。比較添加P2與添加相同量P1的漿體、薄帶與後續試作品,添加P2於製程當中整體有較佳的表現。
In the recent years, ultra thin green tape had become important to the MLCCs industry, due to the downscaling for minimum of the electronic capacitor. Tape casting served as a basic and simple method for the formation of thin ceramic sheet. In order to yield free-defect tape, there are some quality criteria to be considered, such as no defects during drying, microstructural homogeneity, high mechanical strength, good thermocompression ability, and easy burn out.
Two plasticizers, P1 and P2, were employed in the slurry, prepared in nonaqueous media with B1, and discussed the machamism of the BaTiO3 slip rheological, and the mechanical behavior, further the thermocompression ability of green sheets, finally investigated the pyrolysis behavior of the mixture of binder and plasticizer. In the result of the study, the slurry contained plasticizer exhibited excellent rheological behavior, and homogeneity microstructural in the top, bottom and cross section of the sheet. The green sheets with plasticizer decrease in tensile strength, and increase in elongation and peel force with mylar. The plasticizer-free sheet exhited a typical brittle behavior and had no working ability. The low plasticizion sheets show delaminateion in the stacking processs. Plasticizer would be burned out at its pyrolysis temperature, had no effect in the end of pyrolysis temperature of polymer. The slurry and green sheet contain P2 had good plasticization in the experiment than adding P1 in the same amount.
摘要 i
ABSTRACT ii
誌 謝 iii
目錄 iv
表目錄 vii
圖目錄 viii
第一章 緒論 1
1.1 前言 1
1.2 研究動機 4
第二章 理論基礎與文獻回顧 5
2.1 積層陶瓷電容器(MLCC) 5
2.1.1 鈦酸鋇材料的特性 5
2.1.2 MLCC原理與結構 6
2.2 陶瓷添加劑 9
2.2.1 溶劑 9
2.2.2 分散劑 10
2.2.3 黏結劑 11
2.2.4 塑化劑 13
2.3 刮刀成型法 (Tape casting) 15
2.4 流變行為 18
2.4.1 流變的概念 18
2.4.2 黏結劑的糾結理論 19
2.4.3 剪切變稀 (Shear Thinning) 21
2.4.4 觸變行為 (Thixotropy) 22
2.4.5 玻璃轉換溫度 (Glass Transition Temperature) 23
2.5 塑化劑理論 26
2.5.1 定義 26
2.5.2 反塑化行為(Opposing plasticization) 26
2.5.3 選擇方法 28
2.5.4 塑化機制與步驟 30
第三章 實驗步驟與分析方法 32
3.1 實驗藥品 32
3.2 實驗方法與流程 35
3.2.1 塑化劑的種類與添加量對MLCC製程影響 35
3.2.2 塑化劑與黏結劑的燒除 37
3.3 實驗設備與量測條件 38
3.3.1 漿料製程與流變檢測設備 38
3.3.2 薄帶與胚體的製程 39
3.3.3 SEM (掃描式電子顯微鏡) 41
3.3.4 FTIR (傅立葉轉換紅外線光譜分析儀) 42
3.3.5 熱差分析儀/熱重分析儀 (DTA/TGA) 42
第四章 結果與討論 43
4.1 塑化劑對黏結劑B1的塑化行為討論 43
4.2 塑化劑對漿料流變行為的影響 45
4.3 塑化劑對薄帶微結構的影響 52
4.3.1 薄帶微結構上表面 52
4.3.2 薄帶微結構下表面 57
4.3.3 薄帶斷面微結構 61
4.4 塑化劑對生胚製程的影響 65
4.4.1 薄帶的機械特性 65
4.4.2 製程參數 71
4.5 塑化劑與黏結劑的脫脂行為研究 75
4.5.1 B1與塑化劑之脫脂溫度 75
4.5.2 B1與塑化劑之脫脂行為 76
第五章 結論 83
參考文獻 85
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