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系統識別號 U0026-2008201914413900
論文名稱(中文) 利用水玻璃製備氧化矽層包覆鐵矽鉻合金粉末之電磁特性研究
論文名稱(英文) Electromagnetic properties of Fe-Si-Cr alloy powder surface-modified with water glass
校院名稱 成功大學
系所名稱(中) 資源工程學系
系所名稱(英) Department of Resources Engineering
學年度 107
學期 2
出版年 108
研究生(中文) 王思凱
研究生(英文) Ssu-Kai Wang
學號 N46061185
學位類別 碩士
語文別 中文
論文頁數 64頁
口試委員 指導教授-向性一
口試委員-曾文甲
口試委員-許志雄
口試委員-陳智成
口試委員-葉輝邦
中文關鍵字 水玻璃  鐵矽鉻  磁損失  直流疊加特性  電感 
英文關鍵字 water glass  Fe-Si-Cr alloy  magnetic loss  DC bias superposition characteristic  inductors 
學科別分類
中文摘要 本實驗主要探討材料之殼層結構對於功率電感器性能之影響，本研究以平均粒徑10"μ" m的Fe-Si-Cr合金粉末作為原料，並在合金粉末外層包覆一層奈米級的氧化矽絕緣層。藉由在顆粒外層包覆一層絕緣層來提高材料之電阻值，並有效降低磁損失中的渦流損失(eddy current loss)與提升材料之直流疊加特性。
本研究使用矽酸鈉(Sodium silicate)作為生成非晶質氧化矽的反應物，將矽酸鈉溶於去離子水後與鐵矽鉻合金粉末進行混和，並通入二氧化碳氣體使合金粉末表面生成非晶質的氧化矽層。從穿透式電子顯微鏡(TEM)中發現附著於顆粒表面的非晶質氧化矽層約為20nm-50nm，且當水玻璃添加量增加氧化矽層增厚。由實驗結果發現，當鐵矽鉻合金粉末表面披覆氧化矽層，材料之抗氧化能力、電阻值與直流疊加特性皆因氧化矽層增厚而提升，然而在鐵矽鉻合金系統中，當頻率在3MHz以下時磁損失皆由磁滯損失所主導，因此添加矽酸鈉反而增加其矯頑力使整體磁損失上升。
英文摘要 The effects of FeSiCr alloy powder@SiO2 on the electric and magnetic properties were studied. Fe-Si-Cr alloy powder with an average particle size of 10 μm was coated with nano-sized silica powder to increase the resistivity and DC bias superposition characteristic.
In this study, sodium silicate was used as a precursor to form the amorphous silica on the surface of FeSiCr alloy powder. FeSiCr alloy powder was mixed with sodium silicate solution and then carbon dioxide was injected to form an amorphous silica layer on the surface of the alloy powder. Transmission electron microscope was used to investigate the amorphous silica layer. It shows that the thickness of insulating layer was about 20 nm to 50 nm, and the thickness can be controlled by the amount of sodium silicate. The amorphous silica layer can significantly promote the anti-oxidation, resistivity and DC bias superposition characteristic. The magnetic loss is dominated by the hysteresis loss while the frequency is below 3 MHz. The coercive force increased with increasing the SiO2 content, which led to the increase in total magnetic loss.
論文目次 摘要 I
致謝 VIII
目錄 IX
表目錄 XI
圖目錄 XII
第一章 緒論 1
1-1 前言 1
1-2 研究目的 2
第二章 前人研究 3
2-1 金屬功率電感器 3
2-1-1 電感器介紹 3
2-1-2 電感器種類 4
2-1-3 電感器特性 6
2-2 軟磁材料 18
2-2-1 鐵粉種類 18
2-2-2 矽鉻合金特性 20
2-3 包覆膜研究進展 21
2-3-1 包覆膜介紹與方法 21
2-3-2 水玻璃特性 24
第三章 實驗步驟與方法 28
3-1 實驗流程 28
3-2 鐵矽鉻坯體成型及其熱處理 28
3-3 樣品特性分析 31
3-3-1 掃描式電子顯微鏡(SEM) 31
3-3-2 熱重/熱差分析 31
3-3-3 傅立葉轉換紅外線光譜儀(FTIR) 31
3-3-4 直流電阻率分析 31
3-3-5 磁性質分析 32
3-3-6 直流疊加分析 32
3-3-7 磁損失分析 33
3-3-8 超導量子干涉震動磁量儀 33
3-3-9 X光光電子能譜儀(X-Ray Photoelectron Spectrometer) 33
3-3-10 穿透式電子顯微鏡 33
第四章 結果與討論 34
4-1 表層氧化矽相鑑定 34
4-1-1 傅立葉轉換紅外線光譜儀分析 34
4-1-2 XPS縱深分析 35
4-1-3 穿透式電子顯微鏡分析 41
4-2 物理性質分析 46
4-2-1 熱重分析 46
4-2-2 電阻與崩潰電壓分析 47
4-2-3 飽和磁化量分析 50
4-2-4 初導磁係數分析 52
4-2-5 磁損失分析 54
4-2-6 直流疊加特性分析 59
第五章 結論 61
第六章 參考文獻 62

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