摘要
以褐铁矿型和腐泥土型红土镍矿为原料,分别采用酸浸-共沉淀-煅烧与碱浸脱硅-煅烧方法进行了尖晶石铁氧体材料的合成研究,重点考查了不同合成方法对于制备得到的铁氧体材料结构和性能的影响。通过X射线衍射(XRD)、傅里叶红外分析(FT-IR)和综合物性测量系统(PPMS)对铁氧体的结构和性能进行了表征。结果表明,采用两种方法都能合成单一尖晶石铁氧体材料,当采用酸浸-共沉淀-煅烧法,以氢氧化钠溶液为沉淀剂时,合成的是Ni-Co-Mn共掺杂MgFe_2O_4;而采用碱浸脱硅-煅烧法合成的是含有少量SiO_2的多元金属掺杂MgFe_2O_4。磁性能结果显示制备得到的铁氧体材料在常温下均表现出典型的亚铁磁性。多元金属的协同效应和少量SiO_2(2%左右)的掺杂有利于磁性能的提高和改善。
In this paper,the preparation of spinel ferrites using limonite laterite ore and saprolite laterite ore as raw materials by acid leaching-coprecipitation-calcination and alkali leaching desilication-calcination methods was proposed.The effects of preparation methods on the structure and magnetic properties of as-prepared spinel ferrites were focused and investigated,which were characterized by X-ray diffraction(XRD),Fourier transfer-infrared spectrometry(FT-IR)and physical property measurement system(PPMS).The results showed that single phase of spinel ferrite could be obtained by both the two methods.Using acid leaching-coprecipitation-calcination method,Ni-Co-Mn co-doped magnesium ferrites were synthesized with NaOH solution as precipitant,while using alkali leaching desilication-calcination method,polymetallic ferrites with small amount of impurity SiO 2 were obtained.The magnetic properties showed that all the as-prepared samples exhibited typical ferromagnetism.The synergistic effect of multiple metals and doping of a small amount of SiO 2(about 2%)could be beneficial to the enhancement and improvement of the magnetic properties.
作者
高建明
李银鹏
郭彦霞
程芳琴
GAO Jianming;LI Yinpeng;GUO Yanxia;CHENG Fanqin(State Environmental Protection Key Laboratory of Efficient Utilization Technology of Coal Waste Resources,Shanxi Collaborative Innovation Center of High Value-added Utilization of Coal-related Wastes,Institute of Resources and Environment Engineering,Shanxi University,Taiyuan 030006,China)
出处
《功能材料》
EI
CAS
CSCD
北大核心
2018年第4期4124-4127,4133,共5页
Journal of Functional Materials
基金
国家重点研发计划资助项目(2017YFB0603101)
山西省煤基低碳科技重大专项资助项目(MC2016-05)
关键词
红土镍矿
尖晶石铁氧体
结构
磁性能
综合利用
nickel laterite ore
spinel ferrite
structure
magnetic property
comprehensive utilization
