文化大學機構典藏 CCUR:Item 987654321/53094
English  |  正體中文  |  简体中文  |  全文筆數/總筆數 : 47249/51115 (92%)
造訪人次 : 14034695      線上人數 : 340
RC Version 6.0 © Powered By DSPACE, MIT. Enhanced by NTU Library IR team.
搜尋範圍 查詢小技巧:
  • 您可在西文檢索詞彙前後加上"雙引號",以獲取較精準的檢索結果
  • 若欲以作者姓名搜尋,建議至進階搜尋限定作者欄位,可獲得較完整資料
  • 進階搜尋
    主頁登入上傳說明關於CCUR管理 到手機版


    請使用永久網址來引用或連結此文件: https://irlib.pccu.edu.tw/handle/987654321/53094


    題名: 銦摻雜W型鍶鎂鐵氧體之介電與磁特性之研究
    Study of the dielectric and magnetic properties of In-doped W-type SrMg2Fe16O27 Ferrites
    作者: 吳奐樵
    貢獻者: 化學工程與材料工程學系
    關鍵詞: W 型鐵氧體
    尖晶石
    銦摻雜
    磁特性
    微波介電性能
    W-type ferrite
    spinel
    indium doping
    magnetic property
    microwave property
    日期: 2023
    上傳時間: 2024-03-01 16:03:51 (UTC+8)
    摘要: 本研究採用固態反應法合成了摻雜氧化銦的 W 型六方鐵氧體 SrMg2InxFe16-xO27(X=0.0、0.2、0.4、0.6、0.8 和 1.0),以研究其組成轉變、微觀結構和微波特性。 X 光繞射結果表明,摻銦的氧化鍶鎂鐵樣品的結構為 W 型六方鐵氧體(h-鐵氧體),空間群為 P63/mmc,並且可以觀察到隨著燒結溫度的升高,摻銦樣品的結構從 M 型 h-鐵氧體逐漸轉變為 W 型 h-鐵氧體,然後又轉變為尖晶石型。 OM 圖像顯示,晶粒尺寸隨著摻銦含量的增加而增大,同時也發現 1250°C 燒結樣品的晶粒尺寸比其他燒結溫度的樣品要大。 Topas 軟體的分析結果表明在我們的混合相樣品中,1250°C 燒結樣品的 W 型鐵氧體佔相比最大,由於銦離子的半徑較大,W 型 h-鐵氧體結構單胞體積大小隨著摻 In 量的增加而增加。樣品的交流磁導率隨燒結溫度的升高而增大,1250°C 燒結溫度下的樣品的交流磁導率隨摻銦量的增加而緩慢增大,但在微波頻率下差異逐漸減小。微波特性測量數據表明,1250°C 燒結樣品的介電常數隨著摻雜濃度的增加而緩慢減小,但介電損耗會隨著摻雜濃度的增加而減小。透過交流磁導率以及介電分析發現,隨著銦離子摻雜的增加,磁性也跟著提升,但介電性質隨著摻雜而下降。
    In this study, we synthesis the indium doped W-type hexagonal ferrite SrMg2InxFe16-xO27 (X=0.0, 0.2, 0.4, 0.6, 0.8 and 1.0) by solid state reaction method, in order to investigate the structure transition, microstructure and microwave properties. The X-ray diffraction results report that structure of In-doped strontium magnesium iron oxide samples is W-type hexagonal ferrite (h-ferrite) with P63/mmc space group, and it also can be observed that the structure of In-doped samples gradually changes from M-type h-ferrite to W-type h-ferrite then spinal with sintering temperature increasing. The OM images show that the grain size was growth up with In-doped content increasing, and those also shows that the grain size of 1250°C sintering sample is larger than it of the others sintering temperature’s samples. The “Topas software” analysis results display that the maximum W-type ferrite phase percentage of the mix-phase samples are observed of the 1250°C sintering samples, which unit cell volume of W-type h-ferrite structure is increasing with In-doped amount increasing due to In-ion’ larger radii. The AC permeability of samples are increasing with the sintering temperature increasing and it of the 1250°C sintering temperature of samples are slowly increasing with In-doping ratio increasing, but the divergences will be gradually reduce at microwave frequency. The microwave property measurement data shows that the dielectric constant of 1250°C sintering samples is slowly decreasing by increasing In-doped concentrations, and the dielectric loss can reduce with In-doped concentrations increasing.
    顯示於類別:[化學工程與材料工程學系暨碩士班] 博碩士論文

    文件中的檔案:

    檔案 描述 大小格式瀏覽次數
    index.html0KbHTML95檢視/開啟


    在CCUR中所有的資料項目都受到原著作權保護.


    DSpace Software Copyright © 2002-2004  MIT &  Hewlett-Packard  /   Enhanced by   NTU Library IR team Copyright ©   - 回饋