| 煅烧条件对溶胶凝胶法制备Mn-Zn铁氧体的组成及性能的影响 |
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| 引用本文： | 孙玉坤,李冬云,王凡,徐扬,葛洪良,杨辉.煅烧条件对溶胶凝胶法制备Mn-Zn铁氧体的组成及性能的影响[J].稀有金属材料与工程,2018,47(S2):162-166. |
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| 作者姓名： | 孙玉坤 李冬云 王凡 徐扬 葛洪良 杨辉 |
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| 作者单位： | 中国计量大学材料科学与工程学院,中国计量大学材料科学与工程学院,中国计量大学材料科学与工程学院,中国计量大学材料科学与工程学院,中国计量大学材料科学与工程学院, |
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| 摘 要： | 通过模板辅助溶胶凝胶法在不同的烧结气氛和烧结温度下制备出了一系列Mn-Zn铁氧体纳米粉体。利用XRD、TEM、VSM和阻抗分析仪等对材料的相组成、形貌和电磁性能进行了表征。实验结果表明,仅有在573K预烧1h后在氮气气氛中煅烧的样品具有尖晶石结构且颗粒大小均匀；这为制备具有尖晶石结构的Mn-Zn铁氧体纳米粉体提供了一条新的途径。同时文中探讨了了Mn-Zn铁氧体在不同煅烧气氛中的反应机理。此外,煅烧温度是影响尖晶石结构的Mn-Zn铁氧体材料性能的一个重要因素,随着煅烧温度的升高,晶粒尺寸逐渐变大,Ms的单调升高,Hc先升高后降低,Tc单调降低；随着频率的升高,介电常数呈现先升高后降低趋势,而介电损耗则呈先急速升高而后缓慢下降的趋势。
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| 关 键 词： | 煅烧条件 组成 性能 Mn-Zn铁氧体 |
| 收稿时间： | 2017/12/4 0:00:00 |
| 修稿时间： | 2017/12/4 0:00:00 |
Effect of the calcined conditions on composition and properties of Mn-Zn ferrites prepared by sol-gel method |
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| Sun Yukun,Li Dongyun,Wang Fan,Xu Yang,Ge Hongliang and Yang Hui.Effect of the calcined conditions on composition and properties of Mn-Zn ferrites prepared by sol-gel method[J].Rare Metal Materials and Engineering,2018,47(S2):162-166. |
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| Authors: | Sun Yukun Li Dongyun Wang Fan Xu Yang Ge Hongliang and Yang Hui |
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| Affiliation: | College of Materials Science and Engineering,China Jiliang University,Hangzhou,College of Materials Science and Engineering,China Jiliang University,Hangzhou,College of Materials Science and Engineering,China Jiliang University,Hangzhou,College of Materials Science and Engineering,China Jiliang University,Hangzhou,College of Materials Science and Engineering,China Jiliang University,Hangzhou,College of Materials Science and Engineering,Zhejiang University,Hangzhou |
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| Abstract: | A series of Mn-Zn ferrite particles was prepared by a template-assisted sol-gel method and calcined at 773, 973 and 1173 K in air, nitrogen and nitrogen after precalcination at 573 K for 1h in air respectively. The effects of calcined conditions on composition, morphology and properties of Mn-Zn ferrites were investigated by XRD, TEM, VSM and impedance analyzer. It was found that Mn-Zn ferrites with pure spinel structure, uniform size and morphology were obtained only in nitrogen after precalcination at 573 K for 1h in air, which provided a new way to prepare Mn-Zn ferrite nanoparticles with spinel structure. The reaction mechanisms of the Mn-Zn ferrites in different calcined atmospheres were analyzed. The calcined temperature had a major influence on the morphology and properties of the Mn-Zn ferrite particles with spinel structure obtained; and with the increasing of the calcination temperature, the particles in size became larger, Ms increased monotonically, Hc first increased and then decreased, Tc decreased monotonically. The permittivity first increased and then decreased, and the dielectric loss showed a sharp rise after slightly reducing trend with the increasing of frequency. |
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| Keywords: | calcined conditions composition properties Mn-Zn ferrites |
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