以化學共沉法製備高頻用鎳錳鐵氧磁體的開發研究

Development of Ni-Mn Ferrite for High Frequency Application by the Chemical Coprecipitation

陳慶和(Ching-ho Chen)

指導教授 ： 魏萬益

大同大學/工程學院/材料工程學系所/碩士(2007年)

摘要

在高頻下，鎳錳鐵氧磁體有不錯的磁特性表現，添加鈷離子時，由於能夠提升鐵氧磁體之異方性使磁壁穩定化而提升共振頻率。有系統性的分析化學組成與燒結溫度對於磁特性的關聯性，量測項目主要包括:微觀組織(SEM)、μ’-f curve、μ”-f curve及X-ray結構分析。由實驗結果顯示，當降低燒結溫度、鈷離子比例增加，可提升共振頻率，但μ’會隨之遞減；由此可知添加鈷離子對於高頻磁特性的影響，因此可配合材料的使用頻率調整成分比例、燒結條件以達期望之性質。

關鍵字

化學共沉法 ； 高頻用鎳錳鐵氧磁體

並列摘要

Under high frequency, Ni-Mn ferrites have good magnetic characteristics. It is known that the cobalt ions can improve the anisotropy of ferrites make the domain walls stabilized and then increase the resonance frequency . The magnetic properties of Ni-Mn ferrites ware measured, such as μ’-f curve、μ”-f curve、 microstructures(SEM) and crystal structure. The results showed that the resonance frequency was increased and the μ’ was lowered as the cobalt ion content was increased or the sintering temperature was lowered. Thus, doping of the cobalt ions is an effective way in the manufacturing of ferrite materials for high frequency applications. The conditions of sintering processes would also be fine tuned to match the application of the Ni-Mn ferrites.

並列關鍵字

Ni-Mn Ferrite for High Frequency Application ； Chemical Coprecipitation

參考文獻

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