...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics >Effect of Ni substitution on the structural and transport properties of Ni_xMn_(0.8-x)Mg_(0.2)Fe_2O_4; 0.0 ≤ x ≤ 0.40 ferrite
【24h】

Effect of Ni substitution on the structural and transport properties of Ni_xMn_(0.8-x)Mg_(0.2)Fe_2O_4; 0.0 ≤ x ≤ 0.40 ferrite

机译：Ni取代对Ni_xMn_（0.8-x）Mg_（0.2）Fe_2O_4的结构和输运性能的影响; 0.0≤x≤0.40铁氧体

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Ni_xMn_(0.8-x)Mg_(0.2)Fe_2O_4; 0.0 ≤ x ≤ 0.40 was prepared by standard ceramic technique, presintering was carried out at 900°C and final sintering at 1200°C with heating/cooling rate 4°C/min. X-ray diffraction analyses assured the formation of the samples in a single phase spinel cubic structure. The calculated crystal size was obtained in the range of 75-130 nm. A slight increase in the theoretical density and decrease in the porosity was obtained with increasing the nickel content. This result was discussed based on the difference in the atomic masses between Ni (58.71) and Mn (54.938). IR spectral analyses show four bands of the spinel ferrite for all the samples. The conductivity and dielectric loss factor give nearly continuous decrease with increasing Ni-content. This was discussed as the result of the significant role of the multivalent cations, such as iron, nickel, manganese, in the conduction mechanism. Anomalous behavior was obtained for the sample with x = 0.20 as highest dielectric constant, highest dielectric 1 oss and highest conductivity. This anomalous behavior was explained due to the existence of two divalent cations on B-sites with the same ratio, namely, Mg~(2+) and Ni~(2+).
机译：Ni_xMn_（0.8-x）Mg_（0.2）Fe_2O_4;通过标准陶瓷技术制备0.0≤x≤0.40，在900℃下进行预烧结，并在1200℃下以4℃/ min的加热/冷却速率进行最终烧结。 X射线衍射分析确保了样品形成单相尖晶石立方结构。获得的晶体尺寸在75-130nm范围内。随着镍含量的增加，理论密度略有增加，孔隙率降低。基于Ni（58.71）和Mn（54.938）之间原子质量的差异讨论了该结果。红外光谱分析显示所有样品的尖晶石铁素体有四个带。随着Ni含量的增加，电导率和介电损耗因子几乎连续降低。讨论了这是由于多价阳离子（例如铁，镍，锰）在传导机制中起着重要作用的结果。对于具有最高介电常数，最高介电常数1 oss和最高电导率的x = 0.20的样品，获得了异常行为。解释这种异常行为是由于在B位上存在两个相同比率的二价阳离子，即Mg〜（2+）和Ni〜（2+）。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号