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題名 | 以水熱法合成錳鋅﹣﹣鐵氧磁體反應機制之探討 |
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作者 | 張中維; | 書刊名 | 中正嶺學報 |
卷期 | 20:2 1992.01[民81.01] |
頁次 | 頁5-13 |
分類號 | 440.33 |
關鍵詞 | 反應; 水熱法; 合成; 磁體; 鋅; 機制; 錳; 鐵氧; |
語文 | 中文(Chinese) |
中文摘要 | 化鹽-三乙基胺系統所得金屬氮氧化物共沉澱物,經水熱處理後可得不 同錳/鋅莫耳比值及二價鐵含量之錳鋅-鐵氧磁體粉體。實驗證明,水熱反應之反 應機制為金屬離子在非晶相共沉物中遷移排列而形成晶核。金屬離子在共沉物中 之分散均勻性,及配製金屬離子溶液所用溶劑,對水熱反應後晶相之形成有重要 影響。水熱法合成之合純尖晶石相粉體,其飽和磁矩在錳/鋅莫耳比值為3到7 時有最大值。組成比及燒結氣氛對燒結時之晶粒成長有明顯的影響。 |
英文摘要 | The Mn/Zn-ferrite powders with various Mn/Zn mole ratios and Fe2+ contents were preparedby hydrothermally processing the coprecipitants obtained from the (chlorides/Triethyl aminc)systems. The mechanism of hydrothermal reaction was proved that the crystal nuclides were formedby the migration of the metal ions in amorphous coprecipitant. Both the homogeneity of the metalions in coprecipitants and the solvent used in preparing the starting solutions are the importantfactors to affect the phase formation during hydrothermal process. The saturated magnetic momentof the powders with pure spinel phase shows a maximum plateau for Mn/Zn mole ratio in the rangeof 3 to 7. The grain growth while sintering was positively affected by the composition of the ferriteand the atmosphere controlled. |
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