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材料研究学报  2011, Vol. 25 Issue (2): 209-213    
  研究论文 本期目录 | 过刊浏览 |
Sm3+掺杂对SmxNiCo0.2Mn1.8O4热敏陶瓷性能的影响
国娜, 李亚东
苏州大学材料与化学化工部无机材料科学与工程系 苏州 215123
Effect of Sm3+ Doping on the Properties of Thermoceramics SmxNiCo0.2Mn1.8O4
GUO Na LI Yadong
College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123
引用本文:

国娜 李亚东. Sm3+掺杂对SmxNiCo0.2Mn1.8O4热敏陶瓷性能的影响[J]. 材料研究学报, 2011, 25(2): 209-213.
, . Effect of Sm3+ Doping on the Properties of Thermoceramics SmxNiCo0.2Mn1.8O4[J]. Chin J Mater Res, 2011, 25(2): 209-213.

全文: PDF(956 KB)  
摘要: 采用室温固相法和烧结工艺制备SmxNiCo0.2Mn1.8O4(0≦x≦0.05)负温度系数热敏陶瓷, 用XRD和XPS等手段对其进行表征, 研究了Sm3+掺杂对其电性能的影响。结果表明, 当Sm3+掺杂量较低时(x≦0.02), 可以制备出单一的尖晶石相, Sm3+取代尖晶石相八面体间隙中Mn3+有利于获得高热稳定性的尖晶石相; 当Sm3+掺杂量x≧0.03时, 相继出现SmMnO3和SmMn2O5两杂相, 导致SmxNiCo0.2Mn1.8O4热敏陶瓷的热稳定性明显降低。
关键词 无机非金属材料NTC热敏陶瓷SmxNiCo0.2Mn1.8O4尖晶石相XPS电性能    
Abstract:The NTC thermoceramics of SmxNiCo0.2Mn1.8O4(0≤ x ≤0.05)were prepared by the solid reaction technique and characterized by XRD and XPS. The influence of Sm3+ doping on the electrical properties of SmxNiCo0.2Mn1.8O4 spinel phases was investigated. The results show that when Sm3+ doped content was low(x ≤0.02), Sm3+ ions partially substituted Mn3+ions in the octahedral sites of the SmxNiCo0.2Mn1.8O4 spinel phases. It is beneficial to obtain high thermal stability of the spinel phases. While Sm3+ doped content was higher than 0.03, SmMnO3 and SmMn2O5 two impurity phases precipitated one after one and the thermal stability of thermoceramics decreased significantly.
Key wordsinorganic non-metallic materials     NTC thermoceramics    SmxNiCo0.2Mn1.8O4    spinel phase    XPS    electical properties
收稿日期: 2010-11-19     
ZTFLH: 

TB321

 
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