博碩士論文 91324048 詳細資訊




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姓名 黃建豪(jiann-hour Huang)  查詢紙本館藏   畢業系所 化學工程與材料工程學系
論文名稱 高介電陶瓷複合材料在內埋式電容之應用
(High Dielectric Polymer-ceramic Composite for Embedded Capacitor Application)
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摘要(中) 要製作內埋式電容,首先必須要有可以印刷塗佈之高介電材料。大部分研究者都是將市售的高介電陶瓷粉末研磨並作表面改質後,再與基板粘著用的環氧樹酯混成塗料。因為混成物之介電常數與所添加高介電陶瓷量成正比,所以要製備出高介電混成材料之關鍵在於達到高陶瓷比,但仍舊可以印刷或塗佈方法粘著成膜。市售的電容陶瓷粉末研磨後大小不易均勻。不均勻的粉體在樹酯中分散性不好,無法製作出高陶瓷比的塗料。我們認為假若有大小均一之奈米粒子,才可以降低樹酯需要量而將高介電陶瓷以分散成可成膜之塗料。為了測試此一假設,我們先開發出一種方法,可以合成出80~300 nm 三種大小而粒徑均一的鈦酸鋇粉體。然後將之均勻分散在含有溶劑之環氧樹酯中,期望製作出合成出粘著牢固之高介電薄膜。
摘要(英) ABSTRACT
Ultra-fine BaTiO3 powders were synthesized from the hydrothermal reaction of Ba(OH)2 and freshly prepared titanium hydroxide at less than 100oC. By controlling the size of the titanium hydroxide, narrowly distributed BaTiO3 particles with size of 80nm, 200nm or 300nm, reapectively, were prepared. XRD analysis suggested that the particles are cubic BaTiO3 crystalline with about 80 nm in domain size. The so produced powders were modified with silane and re-dispersed in epoxy resin to prepare composite films and disks and cured at 170oC. For composite disks that contain more than 70vol% ceramics, dielectric constant higher than 100 could be achieved, and increased with decreasing particle size. The value was doubled if the powder contained 10% Pb. Silane modification showed a negative effect on the dielectric constant. More resin (50vo%) had to be used to make a well-adhered film via spin coating. The dielectric constant of the cured film was only ~40, which may be improved if a different coating technique is applied.
關鍵字(中) ★ 鈦酸鋇
★ 內埋式電容
★ 鈦酸鍶鋇
關鍵字(英) ★ barium titanate
★ emmbed capacitor
論文目次 目 錄
ABSTRACT I
目 錄 II
圖 目 錄 IV
表 目 錄 VI
第一章 緒 論 1
1-1有機/無機複合材料之簡介 1
1-1.1 有機/無機複合材料在電容之應用 1
1-1.2有機/無機複合材料之介電性質 2
1-1.3有機/無機複合材料之特性 4
1-2 鐵電材料之性質、用途 5
1-2.1鐵電材料之基本性質 5
1-2.2鐵電材料之用途 10
1-3 研究方向 11
第二章 文獻回顧 12
2-1合成鐵電材料的方法 12
2-1.1水熱法製備鈦酸鋇粉體 13
2-2氧化物改質原理 19
2-2-1:靜電斥力 19
2-2-2: DLOV 理論 20
2-2-3:表面立體障礙之構築改質之方法 23
2-3矽烷的作用與反應機構 24
2-3-1 作用 24
2-3-2 反應機構 26
2-4 有機/無機混成材料在電容之討論 30
第三章 鐵電材料的製作 32
3-1製作不同大小的鈦酸鋇 32
3-1-1藥品與儀器 32
3-1-2 製備氫氧化鈦溶膠 37
3-1-3 氫氧化鈦與氫氧化鋇之反應 40
3-1-4 實驗結果 41
3-1-5 討 論 46
3-2 制備鈦酸鍶鋇 49
3-2-1 實驗結果 50
3-2.2 討 論 53
第四章 有機/無機混成材料之合成 54
4-1 利用矽烷改質奈米氧化物 54
4-1-1實驗藥品與實驗步驟 54
4-1-2 實驗結果 55
4-2 奈米氧化物與環氧樹酯的混成 56
4-2-1環氧樹酯之簡介與特性 56
4-2.3奈米氧化物與環氧樹酯的混成實驗 57
第五章 高介電複合材料之電性測試 58
5-1 高介電陶瓷材料之介電性質 58
5-2 高介電薄膜之介電性質 62
第六章 結論與建議 66
參考文獻 68
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指導教授 蔣孝澈(AST Chiang) 審核日期 2004-7-14
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