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本文分析了几种γ-Fe_2O_3样品的磁特性(矫顽力、剩余矫顽力、剩磁与饱和剩磁之比、矫顽力系数)和粒子的流变学特性(轻敲密度、表现密度和可湿性)。样品有如下三种:1.从密度时间不同的α-Fe_2O_3制得的γ-Fe_2O_3;2.从密度实器中取出来的密实化时间不同的γ-Fe_2O_3;3.市场上的密实化和非密实化磁粉。作为密实化程度函数(也就是与表现密度的关系曲线)的磁性数据,证实了粒子间的相互作用增加长松散粒子重新聚集成单颗粒、颗粒束和环形状态分布。样品Ⅰ与样品Ⅱ的可湿性大不相同。假设密实化使粒子产生较为“清洁”的表面 ,从而产生了易于湿润的活性表面。样品Ⅱ恰好证实了这一设想。
In this paper, the magnetic properties (coercivity, residual coercivity, ratio of remanence to saturation remanence, coercivity) and rheological properties (tapping density, density of expression And wettability). There are three types of samples: 1. γ-Fe_2O_3 made from α-Fe_2O_3 with different density times; 2. γ_Fe_2O_3 with different densification times taken from the densitizer; 3. Market densification and Non-densified magnetic powder. Magnetic data as a function of degree of densification (ie, a curve related to the density of densities) demonstrate that the interparticle interactions increase the reaggregation of long loose particles into single particles, particle bundles and annular state distributions. The wettability of sample I and sample II is quite different. It is hypothesized that densification produces particles that are more “clean” surfaces, resulting in an active surface that is easily wetted. Sample II just confirmed this idea.