铁酸锰(锰铁氧体)纳米粉体的制备与表征【毕业论文，绝对精品】.doc

毕业论文 BACHELOR DISSERTATION 论文题目学位类别： 工学学士 学科专业： 铁酸锰（锰铁氧体）纳米粉体的制备与表征 中 文 摘 要 磁性材料一直是国民经济、国防工业的重要支柱与基础，随着科学技术的发展，对材料的研究已经进入纳米级。纳米磁性材料的特性不同于常规的磁性材料，由于与纳米磁性材料相关联的特征物理长度恰好处于纳米量级，如，磁单畴尺寸、超顺磁性临界尺寸、交换作用长度、以及电子平均自由路程等大致处于1-100nm量级，当磁性体的尺寸与这些特征物理长度相当时，就会呈现反常的磁学与电学性质。磁性纳米材料因其独特的性质，在现代科学中广泛地应用在磁记录材料、磁性液体、生物医学、传感器、催化、永磁材料、颜料、雷达波吸波材料等领域，越来越受到人们的关注。 本实验通过低温共沉淀法制备铁酸锰纳米磁性粉体，并对其进IR、XRD等手段分别对样品的物相结构、微观形貌和磁性能进行表征。通过本实验让我们掌握纳米粉体的制备技术及相关的表征手段，更加了解纳米铁酸锰的独特性能。同时还研究了铁酸锰纳米粉体对聚乙烯的力学增强性能。 关键词：低温共沉淀法；纳米材料；铁酸锰；制备；应用 ABSTRACT The magnetic material has always been an important pillar industry and foundation of the national economy and defense. With the development of science and technology, materials research entered the nanoscale. Characteristics of nano-magnetic materials differ from conventional magnetic materials. While the physical length, which associated with the nano-magnetic material is exactly in the nanoscale, such as magnetic single-domain size, super-paramagnetic critical size, the exchange interaction length, and the electronic mean free away roughly at the 1-100nm orders of magnitude. It will show the anomalous magnetic and electrical properties when the magnetic body size matches with the characteristics of the physical length. because of their unique properties, nano-magnetic materials are widely used in modern science in the fields of magnetic recording materials, magnetic fluids, biomedical, sensors, catalysis, magnetic materials, pigments, radar absorbing materials, attracting more attention from people. by the low temperature coprecipitation. This experiment prepares Iron acid manganese nanoscale magnetic powder, and charactered the phase structure of the sample material and the means of XRD and IR icrostructure and magnetic properties. Through this study, we grasped the nanometer powders and related means of characterization, and had a better understanding of the unique properties of na