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粉末冶金材料科学与工程  2019, Vol. 24 Issue (2): 137-146    
  工艺技术 本期目录 | 过刊浏览 | 高级检索 |
水热法制备酚醛树脂球模板尺寸对ZnFe2O4空心球磁性能的影响
王志龙, 葛毅成, 冉丽萍, 易茂中
中南大学 粉末冶金国家重点实验室,长沙 410083
Effect of template size of phenolic resin spheres prepared by hydrothermal method on the magnetic properties of ZnFe2O4 hollow spheres
WANG Zhilong, GE Yicheng, RAN Liping, YI Maozhong
Sate Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, China
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摘要 以间苯二酚和甲醛为反应剂,氨水为催化剂,无水乙醇为分散剂,采用水热法制备酚醛树脂球,然后以酚醛树脂球为模板,以硝酸铁和硝酸锌为原料,制备ZnFe2O4铁氧体空心球。对酚醛树脂球的结构、形貌和粒度以及ZnFe2O4球的晶体结构、化学组成、微观形貌与磁性能进行表征,研究模板球尺寸对锌铁氧体磁性能的影响。结果表明:随搅拌速度增加或甲醛用量减少,酚醛树脂球的尺寸减小。通过控制反应体系中原料的比例和用量,可得到不同尺寸、表面光滑、球形度高、尺寸均一、单分散性好,表面含有大量羟基官能团的酚醛树脂球。ZnFe2O4为结晶良好的立方尖晶石型结构,为规则的空心球,分散性好、尺寸均一。随模板尺寸减小,ZnFe2O4球的尺寸逐渐减小,呈现出铁磁性向顺磁性的转变,饱和磁化强度(Ms)增加。当模板尺寸为271.8 nm时,ZnFe2O4纳米空心球的饱和磁化强度为5.4 (A·m2)/kg。
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王志龙
葛毅成
冉丽萍
易茂中
关键词 模板法酚醛树脂球锌铁氧体粒度磁性能    
Abstract:The phenolic resin microspheres using resorcinol and formaldehyde as reactants, ammonia as catalyst and anhydrous ethanol as dispersant were prepared by hydrothermal method. The hollow ferrite was prepared templated by phenolic resin microspheres, using ferric nitrate and zinc nitrate, ferric chloride and zinc chloride as precursors, respectively. The structure, morphology and particle size of phenolic resin spheres, as well as the crystal structure, chemical composition, micromorphology and magnetic properties of ZnFe2O4 spheres were characterized. The effect of template sphere size on the magnetic properties of zinc ferrite was investigated. The results show that the size of the phenolic resin sphere decreases with the stirring speed increasing or the amount of formaldehyde decreasing. The phenolic resin balls of different sizes can be obtained by controlling the proportion and amount of raw materials in the reaction system, the spherical surface is smooth, the sphericity is high, the size is uniform, and the monodispersity is good, and the surface contains a large amount of hydroxyl functional groups. ZnFe2O4 is a well-crystallized cubic spinel structure, which is a regular hollow sphere with good dispersibility and uniform size. As the size of the template decreases, the size of the ZnFe2O4 sphere gradually decreases, and it turn out the ferromagnetism transit to paramagnetic, and the saturation magnetization (Ms) gradually increases. When the template size is 271.8 nm, the saturation magnetization of the ZnFe2O4 sphere is 5.4 (A∙m2)/kg.
Key wordstemplate method    phenolic resin ball    zinc ferrite    particle size    magnetic properties
收稿日期: 2018-10-22      出版日期: 2019-07-12
ZTFLH:  TB303  
基金资助:国家自然科学基金资助项目(51574293); 粉末冶金国家重点实验室自主研究课题(2017)
作者简介: 葛毅成,副教授,博士。电话:13507105471;E-mail: hncsgyc@csu.edu.cn
引用本文:   
王志龙, 葛毅成, 冉丽萍, 易茂中. 水热法制备酚醛树脂球模板尺寸对ZnFe2O4空心球磁性能的影响[J]. 粉末冶金材料科学与工程, 2019, 24(2): 137-146.
WANG Zhilong, GE Yicheng, RAN Liping, YI Maozhong. Effect of template size of phenolic resin spheres prepared by hydrothermal method on the magnetic properties of ZnFe2O4 hollow spheres. Materials Science and Engineering of Powder Metallurgy, 2019, 24(2): 137-146.
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