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研究生:徐鈵琪
研究生(外文):Ping-chi Shiu
論文名稱:鑭錳鎳(銦)氧化物之製備及其性質之研究
論文名稱(外文):Preparation and Characterization of Lanthanum Manganese Nickel (Indium) Oxides
指導教授:高振豐
指導教授(外文):Chen-feng Kao
學位類別:碩士
校院名稱:國立成功大學
系所名稱:化學工程學系碩博士班
學門:工程學門
學類:化學工程學類
論文種類:學術論文
論文出版年:2008
畢業學年度:96
語文別:中文
論文頁數:75
中文關鍵詞:化學共沉電阻係數
外文關鍵詞:chemical coprecipitationelectrical resistivity
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本實驗為化學共沉法製備不同比例的鑭錳鎳和鑭錳銦氧化物陶瓷粉末,此乃由於化學共沉法具有高均勻性、高反應性、高品質、以及精確的化學計量比。
以化學共沉法製得鑭錳鎳和鑭錳銦兩者之前導化合物,經冷凍乾燥後,未含鎳和銦者分別在800℃煅燒10小時、900℃煅燒10小時由XRD分析得知其主要化合物為鑭錳氧化物。
利用粒徑分析儀可知對於其鑭錳鎳氧化物(0.4μm~0.7μm )小於鑭錳銦氧化物(0.5μm~0.9μm )。
由電阻係數實驗可知鑭錳鎳氧化物(x=0.1mole,ρ=0.76Ω-cm)小於鑭錳銦氧化物(x=0.02mole, ρ=1.46Ω-cm)。
利用磁性測量儀器量測試樣之磁化係數與溫度關係變化之情形,知其均為具鐵磁性物質。
Chemical coprecipitation has high homogeneity,high reactivity,high quality and exact stochiometry.The goal of this study is that the lanthanum –manganese- nickel/indium oxide powders were prepared by coprecipitation method.
The precursors of lanthanum –manganese –nickel and lanthanum –manganese indium oxides with OH- ligands were prepared by coprecipitation.After freeze drying,the precursors were calcined at 800℃ for 10 h and were calcined at 900℃ for 10 h to obtain the corresponding compounds without nickel/indium respectively. It indicated from XRD patterns that the major compound was La0.96MnO3.05,respectively.
Laser Particle Size Distribution Analyzer was used to measure the particle size of the samples.It was found that the particle size lanthanum manganese nickel oxide (0.4μm~0.7μm )is low than that of lanthanum manganese indium oxide(0.5μm~0.9μm ).
From the electrical resistivity(Ohm-cm) one can obtain that the resistivity of lanthanum manganese nickel oxide (x=0.1mole,ρ=0.76Ω-cm)is low than that of lanthanum manganese indium oxide(x=0.02mole, ρ=1.46Ω-cm).
From the variations of susceptibility with temperature analyzed by SQUID,we found that products exhibit Ferromagnetism.
目錄
中文摘要 ................I
英文摘要 ................II
誌謝 .............. ...III
目錄 ..................IV
表目錄 .............. .. VI
圖目錄 .................VII
第一章 緒論 ..............1
1-1 簡介 ...............1
1-2 研究目的 .............2
1-3 文獻回顧 .............3
第二章 理論基礎 ............9
2-1 化學溶液共沉法 ..........9
2-2 鈣鈦礦結構 ............11
2-3 煅燒與燒結 ............12
2-4 體密度 ..............14
2-5 磁性原理 .............15
第三章 實驗 ..............19
3-1 實驗藥品..............19
3-2 實驗儀器..............20
3-3 鑭錳鎳之(銦)氧化物之製備及性質測試.22
3-3-1 實驗流程.............22
3-3-2 溶液配製.............22
3-3-3 共沉...............23
3-3-4 靜置、過濾、乾燥及研磨......23
3-3-5 前導物粉體性質分析........23
3-3-6 煅燒及煅燒後粉末性質分析析....25
3-3-7 壓錠及燒結............26
3-3-8 燒結體的性質測定.........26
第四章 結果與討論...........27
第一部份:鑭錳鎳氧化物..........27
4-1 前導物粉體性質分析.........27
4-1-1 熱重分析.............27
4-2 煅燒及煅燒後粉末性質分析......29
4-2-1 X光繞射分析........... 29
4-2-2 添加鎳對陶瓷粉末之XRD影響.... 29
4-2-3 粒徑分佈及掃描式電子顯微鏡分析..33
4-3 燒結體的性質量測..........38
4-3-1 體密度..............38
4-3-2 磁性測定.............39
4-3-3 電阻量測.............40
第二部份:鑭錳銦氧化物..........42
4-4 煅燒及煅燒後粉末性質分析......42
4-4-1 添加鎳對陶瓷粉末之XRD影響.... 42
4-4-2 粒徑分佈及掃描式電子顯微鏡分析..45
4-5 燒結體的性質量測..........50
4-5-1 體密度..............50
4-5-2 磁性測定.............50
4-5-3 電阻量測.............51
第三部份:鍶添加於鑭錳鎳(銦)氧化物....54
第四部份:溶劑法製備鑭錳鎳氧化物.....55
第五章 總結...............58
文獻回顧 ................61
自述...................65
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