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研究生：	蔣天堯 Chiang, Tien-Yao
論文名稱：	新穎製程製備鐵酸鉍與鋇鐵氧磁體複合物之介電,漏電流與電滯,磁滯曲線行為之研究 Dielectric Behavior,Leakage Current and Hystereses of Polarization and Magnetization of Bismuth Ferrite/ Barium Ferrite Composite Prepared by a Novel Process
指導教授：	方滄澤 Fang, Tsang-Tse
學位類別：	碩士 Master
系所名稱：	工學院 - 材料科學及工程學系 Department of Materials Science and Engineering
論文出版年：	2011
畢業學年度：	99
語文別：	中文
論文頁數：	104
中文關鍵詞：	複鐵材料、電滯曲線、漏電流、介電、磁滯曲線
外文關鍵詞：	BiFeO3
相關次數：	點閱：78 下載：2
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　　BiFeO3 為一複鐵材料，室溫下同時存在的鐵電性與反鐵磁性以及較高的尼爾溫度與居理溫度使它成成為一個具有潛力的材料，但較高的漏電流卻是至今仍須克服的課題。

　　本實驗主要是以溼式化學法製作出純相的Bi2Fe4O9 粉末再添加BaCO3去將Bi2Fe4O9 轉換成BiFeO3 與BaFe12O19 的複合物，藉此討論材料在各種不同BaCO3添加量與煆燒時間下的各種的磁、極化、介電性質以及結構。

BiFeO3 is a multi-ferrite material. Because it exhibits ferroelectric ordering and antiferromagnetic ordering at room temperature and high Neel、Cuire temperature. This has made it to be a potential material. Nevertheless, high leakage current is still a tough topic to overcome.

In this study, pure Bi2Fe4O9 phase is mainly produced by wet chemical method. Bi2Fe4O9 doped with BaCO3 makes Bi2Fe4O9 to covert to a composite mixed by BiFeO3 and BaFe12O19 .We use different calcination time and quantity of dopant condition to discuss its magnetization, polarization dielectric properties and structure.

目錄
中文摘要..................................................I
英文摘要.................................................II
致謝....................................................III
目錄.....................................................IV
表目錄...................................................IX
圖目錄....................................................X

第一章	序論...............................................1
    1-1 前言..............................................1
    1-2研究動機與方向.................................... 2
第二章	理論基礎與文回顧...................................3
     2-1  基本介電理論....................................3
    2-2  極化機構.........................................6
    2-3  鬆弛時間........................................17           
    2-4  鐵電材料........................................26
        2-4-1  鐵電材料相變化............................28
    2-5  磁性材料........................................30
        2-5-1  磁滯曲線..................................35
    2-6  金屬-絕緣介面導電機制(MIM systems)..............36
    2-7  BiFeO3的晶體結構................................ 39
    2-8  BiFeO3的相圖.................................... 43
    2-9  BiFeO3的鐵電性.................................. 44
        2-9-1  BiFeO3的鐵電性............................ 44                                                                                                                                                          
        2-9-2  BiFeO3薄膜的鐵電性........................ 44 
第三章 實驗方法與步驟....................................47
    3-1  實驗藥品........................................47
    3-2  Bi2Fe4O9 粉末製備方法............................ 47
        3-2-1  定量試驗..................................48
        3-2-2  Precursor.................................48
    3-3  粉末製備........................................49
    3-4  塊材製備........................................49
    3-5  SEM試片製備.....................................50
    3-6  TEM試片製備.....................................50
    3-7  實驗流程圖......................................51 
        3-7-1  定量試驗流程圖............................51
        3-7-2  BiFeO3粉末製程流程圖...................... 52
第四章  結果與討論.......................................53
    4-1  不同Ba 參雜量對相之影響.........................53
        4-1-1　Bi(2-X)Fe4O9 Ba 參雜(X=0.3) 6hr 煆燒 XRD分析.54
        4-1-2　Bi(2-X)Fe4O9  Ba 參雜(X=0.4)XRD分析.........55
        4-1-3　Bi(2-X)Fe4O9  Ba參雜 (X=0.5)XRD分析.......56
    4-2  SEM顯微結構觀察...........................57        
4-2-1  BiFeO3 的SEM結構觀察.....................60
        4-2-2  Bi(2-X)Fe4O9  Ba參雜(X=0.4) 2hr 煆燒 的SEM結構分析.............................................61
        4-2-3  Bi(2-X)Fe4O9  Ba 參雜 (X=0.4) 4hr煆燒的SEM結構分析.............................................63
        4-2-4  Bi(2-X)Fe4O9  Ba 參雜 (X=0.4) 6hr煆燒的SEM結構分析.............................................65
        4-2-5  Bi(2-X)Fe4O9  Ba 參雜 (X=0.5) 2hr煆燒的SEM結構分析.............................................66
        4-2-6  Bi(2-X)Fe4O9  Ba 參雜 (X=0.5) 4hr煆燒的SEM結構分析.............................................68
        4-2-7  Bi(2-X)Fe4O9  Ba 參雜 (X=0.5) 6hr煆燒的SEM結構分析.............................................70
    4-3  P-E電滯曲線觀察.................................72
    4-4  漏電流分析......................................78
    4-5  磁滯曲線觀測....................................87
    4-6  介電觀測........................................88
第五章 結論..............................................99
參考文獻................................................101

                                    

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2. Effect of Ba doping on magnetic and dielectric properties of nanocrystalline BiFeO3 at room temperature Chou Yanga, Ji-Sen Jianga,∗, Fang-Zhen Qiana, Dong-Mei Jianga, Chun-Mei Wanga, Wei-Guo Zhangb

3. Magnetic and electrical properties of single-phase multiferroic BiFeO3 A. K. Pradhan,a! Kai Zhang, D. Hunter, J. B. Dadson, and G. B. Loutts P. B hattacharya and R. Katiyar Jun Zhang and D. J. Sellmyer U. N. Roy, Y. Cui, and A. Burger

4. Reduced leakage current in BiFeO3–BiCrO3 nanocomposite films formed by chemical solution deposition Sushil K. Singh,1,2,a_ S. Shanthy,3 and H. Ishiwara2,4

5. BiFeO3 thin films of (1 1 1)-orientation deposited on SrRuO3
buffered Pt/TiO2/SiO2/Si(1 0 0) substrates
Jiagang Wu, John Wang *
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Ferrite Powders
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8. EBSD Studies on Microstructure and Crystallographic Orientation of δ-Hydrides in Zircaloy-4, Zr-1% Nb and Zr-2.5 % Nb.N.A.P. Kiran Kumar1, J.A. Szpunar2 Montreal, PQ H3A 2B2, Canada Saskatoon, SK S7N 5A9, Canada

9. Effect of Ce and Zr codoping on the multiferroic properties of BiFeO3 thin films Jun Liu, Meiya Li(a), Ling Pei, Jing Wang, Zhongqiang Hu, Xiao Wang and Xingzhong Zhao

10. Effect of coalesce doping of Nd and La on structure, dielectric,
and magnetic properties of BiFeO3 Pragya Pandit,1 S. Satapathy,1,a_ P. K. Gupta,1 and V. G. Sathe2 1Laser Materials Development and Devices Division, Raja Ramanna Centre

11. 姜政熙. 鎳鐵氧/鈦酸鍶鋇/鈦酸鍶磊晶薄膜之磁電耦合特性. 國立成功大學物理研究所 (2008)

12. Electrode influence on the charge transport through SrTi03 thin films Guido W. Dietz and Wolfgang Antpijhler Mareike Klee Rainer Waser.

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grown by chemical solution deposition Jong Kuk Kim, Sang Su Kima and Won-Jeong Kim Amar S. Bhalla and Ruyan Guo.

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in BiFeO3 thin films H. Yang,1,2,a_ Y. Q. Wang,2 H. Wang,3 and Q. X. Jia.

27. Room temperature ferroelectric properties of Mn-substituted BiFeO3 thin films deposited on Pt electrodes using chemical solution deposition S. K. Singha_ and H. Ishiwara K. Maruyama

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校內：2012-08-24公開
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