摘要
以氨水、正硅酸乙酯为原料,采用溶胶-凝胶法在羰基铁粉颗粒表面包覆纳米SiO2薄膜,测量和分析了电磁参数变化,并计算损耗角正切和μ/ε比值。结果表明:纳米SiO2包覆膜阻碍了羰基铁颗粒的电子极化并降低电导率,介电常数ε明显减小,而磁导率μ基本不变;纳米SiO2包覆削弱了羰基铁的电损耗能力,但不影响磁损耗能力,同时还改善了羰基铁粉的匹配性能。
With ammonia and ethyl orthosilicate as raw material,nano-SiO2 thin films were coated on carbonyl iron powder particle surface by liquid deposition method. The electromagnetic parameters measurement and calculation of loss tangent andμ/εshow that nano-SiO2 coating hinders the electronic polarization of carbonyl iron particles and reduces conductivity,makes its permittivityε decrease significantly,but the permeability μ basically remains unchanged. Meanwhile,the nano-SiO2 coating weakens the electric loss ability of carbonyl iron,but does not affect its magnetic loss ability,and the matching performance of carbonyl iron powder is improved.
出处
《兵器材料科学与工程》
CAS
CSCD
北大核心
2013年第6期91-93,共3页
Ordnance Material Science and Engineering
关键词
纳米SIO2
羰基铁
电磁性能
nano-SiO2
carbonyl iron
electromagnetic property
