毕业论文：《钡铁氧体制备工艺》.docVIP

PAGE PAGE 钡铁氧化体制备 摘要 钡铁氧体由于其独特的结构及性能，在传感元件、光电材料和磁敏光记录材料、颜料、脱氢催化剂等许多方面得到了广泛应用。本论文主要以Fe2O3、BaCO3 为原料，采用正交实验在不同的配比、烧结温度、保温时间条件下制备六角硬磁钡铁氧体，分析研究了六角硬磁钡铁氧体的制备工艺（原料配比、烧结温度、保温时间）对材料性能的影响，并对不同的影响因素得到不同制备条件下的钡铁氧体进行研究。实验中采用激光粒度仪对混合后的原料进行粒度分析，混合后的原料粒度在0.20μm-2.00μm范围内，混合粒度越小，比表面积越大，固相反应速度越快。 最后用X射线衍射(XRD)对预烧后得到的粉料进行物相分析，图谱结果表明除了有钡铁氧体BaFe12O19外，还有部分Fe2O3，这是由于BaO与Fe2O3的原料配比分别为1：6和1：5.6，Fe2O3的摩尔浓度比较大，在高温预烧后一部分与BaO形成六角型钡铁氧体，其余部分为Fe2O3。此现象说明本实验选择的原料配比不能够生成六角硬磁钡铁氧体。此实验结果为以后钡铁氧体制备研究提供了理论基础与实验依据。 关键词：磁性材料；铁氧体；钡铁氧体 Preparation Technical Study of Barium Ferrite Abstract Barium ferrite due to its unique structure and performance， the sensing components， optoelectronic materials and magnetic optical recording materials， pigments， and many other aspects of dehydrogenation catalyst has been widely applied. In this paper， mainly Fe2O3， BaCO3 as raw material， the use of orthogonal experiment in different ratio， sintering temperature， holding time under the conditions of preparation of hexagonal ferrite hard magnetic barium， analysis of the hexagonal ferrite hard magnetic Preparation of barium ( ratio of raw materials， sintering temperature， holding time) on the material properties and the impact of different factors under different conditions of preparation of barium ferrite research. Experiments using laser particle size analyzer on the mixture of raw materials for particle size analysis， particle size of raw materials mixed in the range of 0.20μm-2.00μm， mixed-grain size smaller than the surface area the greater the faster solid-state reaction. Finally， X-ray diffraction (XRD) after pre-burn phase of the powder for analysis， mapping results show that in addition to spinel ferrite BaFe12O19， there are parts of Fe2O3， which is due to BaO and Fe2O3， respectively， for the 1:6 ratio of raw materials and 1:5.6， Fe2O3 molar concentration of relatively large， high-temperature burn-in the latter part of the formation and BaO spinel-type barium ferrite， for the rest of the Fe2O3. This phenomenon i