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研究生：	許孝慈 Shiu, Shiau-Tsz
論文名稱：	低溫共燒型鎢青銅礦介電材料—Co2Y鐵氧磁體陶瓷複合材料及積層結構之研究 Study on the low-temperature co-fired tungsten bronze dielectric -Co2Y ferrite composites and multilayer structures
指導教授：	向性一 Hsiang, Hsing-I
學位類別：	碩士 Master
系所名稱：	工學院 - 資源工程學系 Department of Resources Engineering
論文出版年：	2011
畢業學年度：	99
語文別：	中文
論文頁數：	155
中文關鍵詞：	介電性質、複合材料、層裂
外文關鍵詞：	dielectric properties, composites, delamination
相關次數：	點閱：85 下載：1
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由於同時擁有優異磁及介電性質之複合材料可製作低成本、高性能之高頻複合式L/C EMI 濾波器，近年來已引起學者廣泛之研究。本研究選擇添加不同Bi成分於BaO‧Nd2O3‧4TiO2中，並加入Zn-B-Si玻璃助燒結劑已達低溫燒結效果並探討玻璃助燒結劑對BaO．Nd2O3．4TiO2系統中所產生之影響。研究顯示添加8wt%ZBS玻璃助燒結劑於BNBT(BaO．(Nd0.8Bi0.2)2O3．4TiO2)樣品，可在900℃，2h燒結緻密化，並有優異之介電性質。此外將BNT(BaO．Nd2O3．4TiO2)微波介電粉末與Co2Y鐵氧磁體粉末進行複合，並添加適量之玻璃助燒結劑，雖可在900℃燒結緻密，但Co2Y會因此而分解，利用疊層方式製作積層複合結構發現電容層與電感層於900℃，2h燒結後匹配度良好，無翹曲與大量層裂產生，因此具有做為高頻L/C複合元件原料之潛力。

Recently, the composites with both superior dielectric and magnetic properties can be used to produce a low cost and high performance L/C EMI filter for high frequency application. A high dielectric constant material, BaO-Nd2O3- Bi2O3-4TiO2, (BNBT) was chosen as the raw material for the present work. Moreover, Zn-B-Si (ZBS) glass was used to decrease the densification temperature of BNBT ceramics. The effects of the addition of various amounts of glasses on both the densification behavior and dielectric properties were investigated. The results revealed that BaO．(Nd0.8Bi0.2)2O3．4TiO2 added with 8wt% ZBS glass could be densified at 900℃ for 2h, which possess excellent dielectric properties. Furthermore, the above dielectric materials were mixed with different amounts of Co2Y ferrites to form the dielectric-magnetic composites. With appropriate glass addition, the dielectric-magnetic composites could be densified at 900℃ for 2 h, but Co2Y would decompose due to the reaction between BNBT and Co2Y. No camber and delamination were found in the multilayer structures formed by alternately laminating BNBT and Co2Y green sheet and sintering at 900℃. This suggests that the BNBT and Co2Y have the potential of being raw materials for high performance L/C EMI components.

摘要	I
Abstract	II
誌謝	III
目錄	IV
表目錄	VII
圖目錄	VIII
第一章、緒論	1
1-1前言	1
1-2研究目的	2
第二章、前人研究及理論基礎	3
2-1微波通訊材料	3
2-2低溫共燒陶瓷	5
2-3鎢青銅礦Ba6-2xNd8+2xTi18O54成分系統之晶體結構與其電性質	6
2-4 六方晶型鐵氧磁體結構	11
2-5 介電性質與磁性質	14
2-5-1介電常數	14
2-5-2品質因子	17
2-5-3共振頻率之溫度係數	19
2-5-4 磁性質與其來源	19
2-5-5 磁化率與初始磁導率	20
2-5-6磁滯曲線	22
2-5-7 功率損失(Power loss)	24
2-5-8 磁異向性	25
2-6 添加劑之效果	26
2-7 液相燒結	30
2-7-1粉末顆粒大小對燒結行為之影響	30
2-7-2液相燒結	30
2-7-3接觸角	33
2-7-4溶解度之影響	35
2-8、陶瓷複合材料	37
2-9 共燒時常見之缺陷	38
第三章、實驗方法及步驟	40
3-1 起始原料	40
3-2 粉末及燒結體製備	40
3-2-1 微波介電粉末、磁性粉末、玻璃粉末之製備	40
3-2-2 複合粉末製備	40
3-2-3 微波介電燒結體備製	41
3-2-4 六方晶系鐵氧磁體Co2Y燒結體備製	41
3-2-5 複合材料燒結體備製	41
3-3 材料特性分析	41
3-3-1 燒結收縮曲線及密度	41
3-3-2潤濕角及介面反應之測量	43
3-3-3 相鑑定	43
3-3-4 顯微結構分析	43
3-4 材料性質量測	45
3-4-1 磁性材料與複合材料電性與磁性分析樣品準備	45
3-4-2 磁性材料與複合材料電性與磁性分析	45
3-4-3 微波介電燒結體電性量測樣品準備	45
3-4-4 微波介電性值量測	45
第四章、結果與討論	52
4-1 低溫燒結陶瓷材料微波介電BaO．(Nd1-xBix)2O3．4TiO2系統	52
4-1-1 玻璃添加量對材料結晶行為之影響	52
4-1-2玻璃助燒結劑與BNT潤濕角與介面反應分析	56
4-1-3 玻璃添加量對材料相對密度之影響	60
4-1-4 玻璃添加量對材料收縮行為之影響	60
4-1-5 玻璃添加量對材料顯微結構之影響	69
4-1-6 玻璃添加量對材料介電性質之影響	70
4-2、Y相鐵氧磁體系統	81
4-2-1玻璃添加量對材料結晶行為之影響	81
4-2-2玻璃助燒結劑與Co2Y潤濕角與介面反應分析	84
4-2-3 玻璃添加量對材料緻密化行為之影響	88
4-2-4 玻璃添加量對材料顯微結構之影響	91
4-2-5 玻璃添加量對材料介電性質與磁性質之影響	93
4-3、陶瓷複合材料	100
4-3-1 玻璃添加量對陶瓷複合材料性質之影響	100
4-3-1-1 玻璃添加量對材料結晶行為之影響	100
4-3-1-2 玻璃添加量對材料緻密化行為之影響	103
4-3-1-3 玻璃添加量對材料顯微結構之影響	108
4-3-1-4玻璃添加量對材料介電性質與磁性質之影響	112
4-3-1-5 NdBa2Fe3O7.995顯微結構、介電性質與磁性質分析	114
4-3-2 不同混合比例對陶瓷複合材料性質之影響	123
4-3-2-1 不同混合比例對材料結晶行為之影響	123
4-3-2-2 不同混合比例對材料緻密化行為之影響	126
4-3-2-3 不同混合比例對材料顯微結構之影響	131
4-3-2-4不同混合比例對材料介電性質與磁性質之影響	135
4-3-4 共燒行為分析	142
4-3-3-1 共燒匹配性分析	142
4-3-3-2 共燒之介面反應分析	145
第五章、結論	148
參考文獻	149

                                    

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