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对“多铁性”脉冲形成线输出特性进行了研究。利用镍锌铁氧体-钛酸钡陶瓷复合多铁性材料制作了脉冲形成线。在不同的磁回路条件下得到了不同脉冲宽度的电脉冲方波,其中以高磁导率材料组合成的闭合磁回路得到了脉冲宽度约201 ns的方波输出。推算出脉冲形成线的相对介电常数接近2 000,相对磁导率大于1.4。基于有效磁导率的概念,分析了多铁性脉冲形成线几何构型对脉冲输出特性的影响。分析表明:平板状“多铁性脉冲形成线”的有效磁导率不仅取决于平板介质的磁导率,还取决于周围介质的磁导率,因而有效磁导率通常较小,其输出表现出明显的铁电性而只有“弱”的铁磁性;相比之下,同轴结构的“多铁性脉冲形成线”具有更高的有效磁导率,其输出可同时表现出强的铁电性和铁磁性,即更明显的“多铁性”。“多铁性脉冲形成线”有可能在紧凑型脉冲功率系统中获得应用。
The output characteristics of the “multiferroic” pulse forming lines were studied. Pulsed formation lines were fabricated using nickel-zinc ferrite-barium titanate ceramic composite multiferroic material. The square wave output of pulse width about 201 ns was obtained by the closed magnetic circuit composed of high permeability materials with different pulse widths under different magnetic circuit conditions. It is estimated that the relative permittivity of the pulse formation line is close to 2 000 and the relative permeability is greater than 1.4. Based on the concept of effective permeability, the influence of multi-iron pulse formation line geometry on pulse output characteristics is analyzed. The analysis shows that the effective magnetic permeability of the plate-like “multiferroic pulse forming wire” depends not only on the permeability of the plate medium but also on the permeability of the surrounding medium, so the effective permeability is usually small, In contrast, the ferromagnetic properties of the “multi-iron pulse formation line” of the coaxial structure have a higher effective permeability, the output of which may be “ferromagnetic” At the same time, it shows strong ferroelectricity and ferromagnetism, that is, the more obvious “iron”. “Multiferroic pulse formation lines” are likely to be used in compact pulse power systems.