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粘结剂对温压非晶软磁粉芯作用的研究

Powder Metallurgy Technology(2015)

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Abstract
采用粉末冶金温压成形技术研制了非晶Fe78Si9B13软磁粉芯,分别研究了粘结剂233耐高温有机硅树脂和JH1123两种粘结剂对该种软磁粉芯的微观形貌、密度、磁导率、损耗、品质因数的作用,结果表明:粘结剂对提高粉末的压坯密度有重要作用,粘结剂的含量过高或过低都会降低磁粉芯的压坯密度.添加3.0%JH1123(质量分数,下同)粘结剂时获得的最高压坯密度是4.93 g/cm3.相比于硅树脂233粘结剂,同样含量下JH1123粘结剂对应的有效磁导率明显较高,添加3.0% JH1123粘结剂50 kHz时的有效磁导率可达到最高值50.2(50 kHz时).50 ~200 kHz下磁损耗均较小,品质因数在高频下可以保持在一个较高水平.
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