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研究生:楊明儒
研究生(外文):Yang Ming-Ju
論文名稱:粉末尺寸對鈦酸鋇陶瓷元件特性影響之研究
論文名稱(外文):Effect of Powder Size on the Characteristics of Barium Titanate Ceramics Device
指導教授:張文俊張文俊引用關係
指導教授(外文):Chang Wen-Chung
學位類別:碩士
校院名稱:南台科技大學
系所名稱:電子工程系
學門:工程學門
學類:電資工程學類
論文種類:學術論文
論文出版年:2007
畢業學年度:95
語文別:中文
中文關鍵詞:鈦酸鋇陶瓷奈米級粉末介電特性
外文關鍵詞:barium titanate ceramicsnano-powdersdielectric properties
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本文主要探討以奈米級粉末(約40nm)及微米級粉末(約2m)來燒製鈦酸鋇陶瓷的介電特性之差異。由實驗結果而可知原始粉末愈細小其燒結溫度愈低,以純奈米級粉末所形成的陶瓷體之燒結溫度較純微米級粉末所形成的陶瓷體低150 ℃左右。在相同的燒結條件下,陶瓷體的相對密度隨粉末尺寸的減少而上升。燒結體的晶粒大小不隨原料粉末的尺寸來變約在1m的範圍。純奈米級粉末所形成的陶瓷體之室溫的介電常數約為4500,而純微米級粉末所形成的陶瓷體之室溫的介電常數約只有2200。
The dielectric properties of barium titanium ceramics fabricated with nano-powders (about 40nm) are compared with that fabricated with coarse powders (about 2m). The sintering temperatures are decreases with the decreasing of the starting powders size, the sintering temperatures of the ceramics used nano-powders are lower 1about 150℃ than that used coarse powders. For the same sintering conditions, the relative density of the ceramics was increases with the increasing of the amount of nano-powders. The gain size of the sintered ceramics body about 1m. The room temperature dielectric constant of the ceramics with nano powder is about 4500, but that of coarse powder is only 2200.
摘要.............................................................................................................................. iv
致謝.............................................................................................................................. vi
目錄........................................................................................................................... vii
圖目錄.......................................................................................................................... ix
表目錄........................................................................................................................... x
第一章 簡 介............................................................................................................. 1
1.1 前言......................................................................................................... 1
1.2 論文架構................................................................................................... 1
第二章 文獻回顧.................................................................................................... 2
2.1 鈦酸鋇(BaTiO3)之合成.............................................................................. 2
2.2 鈦酸鋇晶體結構及特徵…........................................................................ 4
2.2.1 鈣鈦礦之結構 ................................................................................ 4
2.2.2鈣鈦礦之形成 .................................................................................. 5
2.2.3鈦酸鋇晶體之特性........................................................................... 7
2.3鈦酸鋇之介電性......................................................................................... 10
2.3.1介電性基本理論.............................................................................. 10
2.3.2鈦酸鋇晶體結構對介電性之關係.................................................. 12
2.4粒徑對鈦酸鋇燒結之影響......................................................................... 13
第三章 實驗步驟....................................................................................................... 14
3.1鈦酸鋇粉體之備製 ..................................................................................... 14
3.1.1 實驗材料 ........................................................................................ 14
3.1.2 實驗步驟 ......................................................................................... 14
3.1.3 粉體的相鑑定 .................................................................................. 16
3.1.4 粉體的粒徑分析............................................................................. 17
3.1.5 粉末調配......................................................................................... 17
3.2鈦酸鋇試片之備製及量測........................................................................... 17
3.2.1 試片的成形、燒結......................................................................... 17
3.2.2 試片的相鑑定…............................................................................. 18
3.2.3 SEM微結構觀察............................................................................. 18
3.2.4 密度量測......................................................................................... 18
3.2.5 電性之量測..................................................................................... 19
第四章 結果與討論................................................................................................... 20
4.1 粉體相的鑑定 ........................................................................................... 20
4.2 粉體的粒徑分析........................................................................................ 22
4.3 試片的相鑑定............................................................................................ 24
4.4 密度量測.................................................................................................... 28
4.5 SEM微結構觀察........................................................................................ 29
4.6 電性量測.................................................................................................... 32
第五章 結論............................................................................................................... 34
參考文獻....................................................................................................................... 35
作者簡介....................................................................................................................... 37
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