• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Materials Engineering and Performance >Effect of MnO_2 Addition on Sintering Properties of 18NiO-NiFe_2O_4 Composite Ceramics: Preliminary Results
【24h】

Effect of MnO_2 Addition on Sintering Properties of 18NiO-NiFe_2O_4 Composite Ceramics: Preliminary Results

机译：MnO_2添加对18NiO-NiFe_2O_4复合陶瓷烧结性能的影响：初步结果

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

NiFe_2O_4 samples with small amounts of MnO_2 were prepared via ball-milling process and two-step sintering process from commercial powders. Sintered density, average grain size, and microstructure of Mn-doped 18NiO-NiFe_2O_4 composite ceramics have been investigated by means of x-ray diffraction, scanning electron microscopy, and energy dispersive spectroscopy. Bending strength was measured by three-point method. The results show that the crystalline structures of the ceramic matrix are still NiFe_2O_4 spinel structure and Mn ions homogeneously distribute in both the grains interiors and the grain boundaries. When 1 wt.% MnO_2 was added, the values of relative density and bending strength of composite ceramics reached their respective maximum of 93.6% and 38.75 MPa, respectively. It is preliminarily found that MnO_2 can reduce the sintering temperature obviously because of partial substitution of Fe~(3+) with Mn~(4+) in NiFe_2O_4 lattice.
机译：通过球磨工艺和两步烧结工艺，从市售粉末中制备了少量MnO_2的NiFe_2O_4样品。通过X射线衍射，扫描电镜和能谱分析研究了Mn掺杂的18NiO-NiFe_2O_4复合陶瓷的烧结密度，平均晶粒尺寸和微观结构。弯曲强度通过三点法测定。结果表明，陶瓷基体的晶体结构仍为NiFe_2O_4尖晶石结构，Mn离子均匀分布在晶粒内部和晶界。当添加1重量％的MnO 2时，复合陶瓷的相对密度和弯曲强度的值分别达到其最大值的93.6％和38.75MPa。初步发现，由于NiFe_2O_4晶格中的Fe〜（3+）被Mn〜（4+）部分取代，MnO_2可以明显降低烧结温度。

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