系統識別號 | U0002-0708200813591900 |
---|---|
DOI | 10.6846/TKU.2008.00166 |
論文名稱(中文) | 噴霧熱解在LaAlO3 奈米粉體上之製備應用 |
論文名稱(英文) | Application of the spray pyrolysis on preparing LaAlO3 nanoparticles |
第三語言論文名稱 | |
校院名稱 | 淡江大學 |
系所名稱(中文) | 化學工程與材料工程學系碩士班 |
系所名稱(英文) | Department of Chemical and Materials Engineering |
外國學位學校名稱 | |
外國學位學院名稱 | |
外國學位研究所名稱 | |
學年度 | 96 |
學期 | 2 |
出版年 | 97 |
研究生(中文) | 王順賢 |
研究生(英文) | Shuen-Shian Wang |
學號 | 695400217 |
學位類別 | 碩士 |
語言別 | 繁體中文 |
第二語言別 | |
口試日期 | 2008-07-09 |
論文頁數 | 110頁 |
口試委員 |
指導教授
-
余宣賦(hfyu@mail.tku.edu.tw)
委員 - 余宣賦(hfyu@mail.tku.edu.tw) 委員 - 張裕祺(040791@mail.tku.edu.tw) 委員 - 尹庚鳴(cekenyin@saturn.yzu.edu.tw) |
關鍵字(中) |
噴霧熱解 氣膠 檸檬酸 奈米粉體 LaAlO3 |
關鍵字(英) |
spray pyrolysis aerosol citrate acid nano-sized particles Lanthanum aluminate |
第三語言關鍵字 | |
學科別分類 | |
中文摘要 |
利用噴霧熱解程序製備結晶的LaAlO3奈米粉體。以檸檬酸作為鏊合劑加入以化學計量比所配製而成的硝酸欄和硝酸鋁的水溶液中形成LaAlO3。將所獲得的溶液藉由氨水或硝酸調整至中性的水溶液。此中性水溶液經由雙流體式霧化器形成氣膠,所形成的氣膠導入管狀反應爐進行溶劑蒸發以及固體鹽類的分解,所形成的固體粉體使用靜電粒子收集器來收集。將處理過後的粉末藉由熱分析儀、紅外線光譜儀、X光繞射分析儀、掃瞄式電子顯微鏡及場發式電子顯微鏡等來探討粉末之特性。經程序後所直接收集到的粉體屬於非結晶形態的中空球形粉粒體,粉體粒徑尺寸為數個微米。粉體經煆燒熱處理700℃透過研磨可獲得結晶的奈米級LaAlO3粉體。 |
英文摘要 |
Crystalline LaAlO3 nanoparticles were prepared using a spray pyrolysis process. Citric acid, as a chelating agent, was added into the aqueous solution containing the stoichiometric amount of lanthanum nitrate and aluminum nitrate to form LaAlO3. The obtained solution was then adjusted to neutral condition using NH4OH and/or HNO3. The neutral aqueous solution was transform to solution aerosols by a two-fluid type atomizer. The formed aerosols were introduced to the reaction tube and after solvent evaporation and solid salt decomposion, the resultant solid particles were collected using an electrostatic precipitator. The as-formed particles and the post-treated particles were characterized using thermogravimetric analysis, thermal differential analysis, infrared spectroscopy, x-ray diffractomtry, scanning electron microscopy, and transmission electron microscopy. The particles directly collected on the end of the process were noncrystalline hollow spherical particles with particle sizes in several micrometers. After heating the as-formed particles at 700℃ and grinding the calcined particles, crystalline LaAlO3 nanoparticles were obtained. |
第三語言摘要 | |
論文目次 |
目 錄 頁次 中文摘要 Ⅰ 英文摘要 Ⅱ 目 錄 Ⅲ 圖 目 錄 Ⅶ 表 目 錄 Ⅸ 第一章 緒論 1 1-1前言 1 1-2研究動機與目的 2 第二章 文獻回顧及基礎原理 4 2-1 微波介電陶瓷簡介 4 2-2-1微波介電陶瓷 4 2-2 鈣鈦礦結構(Perovskite Structure) 5 2-3 LaAlO3 介紹 6 2-3-1傳統固態反應法 7 2-3-2 共沉澱法 9 2-3-1傳統固態反應法 7 2-3-2 共沉澱法 9 2-3-3溶膠凝膠法 12 2-3-4檸檬酸鹽先驅物法 13 2-4介電共振器(Dielectric Resonator;DR) 16 2-5介電陶瓷的微波特性需求 18 2-5-1介電常數(Dielectric Constant:εr) 18 2-5-2品質因數(Quality Factor:Q) 20 2-6介電理論 21 2-6-1極化機制 22 2-6-2介電損失 26 第三章 噴霧熱解程序 29 3-1噴霧熱解程序簡介 29 3-1-1氣膠生成...........................................................................30 3-1-2氣膠乾燥與熱解...............................................................31 3-1-3旋風分離器.......................................................................32 3-1-4靜電集塵器.......................................................................32 3-1-5中空顆粒的形成...............................................................33 3-2噴霧熱解程序在陶瓷粉體製備上的應用 33 第四章 實驗步驟與儀器分析 35 4-1 實驗製程 35 4-2噴霧熱解程序之儀器設備..........................................................40 4-3儀器分析………………………………….…………………….41 4-3-1 X光繞射分析儀(XRD) 41 4-3-2 傅立葉轉換紅外線光譜分析儀(FT-IR) 42 4-3-3掃描式電子顯微鏡(SEM) 43 4-3-4穿透式電子顯微鏡(FETEM) 44 4-3-5熱重-熱差分析儀(TGA-DTA) 45 第五章 結果與討論 47 5-1收集器溫度對合成LaAlO3之熱行為表現 47 5-1.1 L-NF-TL之熱行為表現.....................................................47 5-1.2 L-NF-TH之熱行為表現 52 5-2燃料添加對合成LaAlO3之熱行為表現 47 5-2.1 H-NF-TH之熱行為表現.....................................................57 5-2.2 H-F-TH之熱行為表現........................................................62 5-3 L-NF與TH、TL對LaAlO3前驅粉體形態的影響 67 5-4 L-F與TH、TL對LaAlO3前驅粉體形態的影響 ..78 5-5H-NF與F對TH LaAlO3前驅粉體形態的影響 ...89 第六章 結論 100 參考文獻 101 圖 目 錄 頁次 圖2-1鈣鈦礦(ABO3)結構 6 圖2-2電磁波由介質 A(ε1,μ1)入射到介質 B(ε2,μ2) 17 圖2-3電磁波發生全反射之情形 18 圖2-4電子極化 22 圖2-5離子極化 23 圖2-6方向極化 24 圖2-7空間電荷極化 25 圖2-8各種極化形成的頻率範圍 26 圖2-9電容之相位變化圖 27 圖4-1實驗流程示意圖 39 圖4-2實驗所用噴霧熱解程序的示意圖 40 圖5-1.1(a) L-NF-TL前驅粉體TGA/DTA分析 49 圖5-1.1(b) L-NF-TL前驅粉體FTIR分析 50 圖5-1.1(c) L-NF-TL前驅粉體XRD分析 51 圖5-1.2(a) L-NF-TH前驅粉體TGA/DTA分析 54 圖5-1.2(b) L-NF-TH前驅粉體FTIR分析 55 圖5-1.2(c) L-NF-TH前驅粉體XRD分析 56 圖5-2.1(a) H- NF-TH前驅粉體TGA/DTA分析 59 圖5-2.1(b) H- NF-TH前驅粉體FTIR分析 60 圖5-2.1(c) H- NF-TH前驅粉體XRD分析 61 圖5-2.2(a) H- F-TH前驅粉體TGA/DTA分析 64 圖5-2.2(b) H- F-TH前驅粉體FTIR分析 65 圖5-2.2(c) H- F-TH前驅粉體XRD分析 66 圖5-3(a) L-NF-TH與L-NF-TL經700℃持溫3小時FTIR分析 71 圖5-3(b) L-NF-TH與L-NF-TL,經700℃持溫3小時XRD分析 72 圖5-3(c) L-NF前驅粉體之SEM圖 73 圖5-3(d) L-NF煆燒700℃3小時粉體之SEM圖 74 圖5-3(e) L-NF煆燒700℃3小時粉體研磨後之SEM圖 75 圖5-3(f) L-NF煆燒700℃3小時粉體研磨後之FE-SEM圖 76 圖5-3(g) L-NF煆燒700℃3小時粉體研磨後之TEM圖 77 圖5-4 (a) L-F-TH與L-F-TL,經700℃持溫3小時FTIR分析 82 圖5-4 (b) L-F-TH與L-F-TL,經700℃持溫3小時XRD分析 83 圖5-4(c) L-F前驅粉體之SEM圖 84 圖5-4(c) L-F前驅粉體之SEM圖 85 圖5-4(e)L-F煆燒700℃3小時粉體研磨後之SEM圖 86 圖5-4(f) L-F煆燒700℃3小時粉體研磨後之FE-SEM圖 87 圖5-4(g) L-F煆燒700℃3小時粉體研磨後之TEM圖 88 圖5-5(a) H-NF-TH與H-F-TL經700℃持溫3小時FTIR分析 93 圖5-5(b) H-NF-TH與H-F-TL經700℃持溫3小時XRD分析 94 圖5-5(c)H- TH前驅粉體之SEM圖 95 圖5-5(d) H- TH煆燒700℃3小時粉體之SEM圖 96 圖5-5(e) H- TH煆燒700℃3小時研磨後之SEM圖 97 圖5-5(f) H- TH煆燒700℃3小時研磨後之FE-SEM圖 98 圖5-5(f) H- TH煆燒700℃3小時研磨後之TEM圖 99 表 目 錄 頁次 表2-1目前開發之高介電微波陶瓷材料 5 表3-1霧化器種類及特性. 31 表4-1實驗所使用之化學藥品與級數及用. 31 表4-2前驅粉體代號表 38 表4-3設定儀器參數表 41 |
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