MnCoNiO陶瓷材料制备及其电学特性研究

Preparation and Electrical Properties of MnCoNiO Ceramic Materials

采用固相反应法制备Mn1.47Co1.095-xNi0.435+x^O4(X=0~0.343)热敏陶瓷。利用XRD、SEM以及电性能测试等手段表征了陶瓷相组成、微观结构和材料的电学特性。结果表明:当Ni含量≤0.484(x=0.049)时,陶瓷体为单一尖晶石结构,并且随着Ni含量的增加,衍射峰强度逐渐增强;当Ni含量≥0.533(x=0.098)时,出现Mn2O3衍射峰,且随着Ni含量的进一步增加,Mn2O3衍射峰强度增强,尖晶石衍射峰强度减弱,陶瓷体为尖晶石和Mn2O3混合相。在1150℃到1250℃烧结温度范围内,通过调节Ni元素含量,Mn1.47Co1.095-xNi0.435+x^O4陶瓷室温电阻率从1815.3Ω·cm变化到171439Ω·cm。

In this paper, solid-state reaction method was used to prepare Mn1.47 Co1.095-XNi0.435+XO4(X=0 0.343)thermal ceramics. Phase composition, microstructure and electrical properties of the ceramic materials were characterized by XRD, SEM and electrical performance tests. The result shows that when the Ni content is less than 0.484(x=0.049), the ceramic is a single spinel structure, and the intensity of the diffraction peak gradually increases with the increase of the Ni content; When the Ni content is greater than 0.533(x=0.098), Mn2 O3 precipitates and the ceramic becomes a mixed phase of spinel and Mn2 O3. From 1150 ℃ to 1250 ℃, the room temperature resistivity of Mn1.47 Co1.095-XNi0.435+XO4 ceramics change from 1815.3 Ω·cm to 171439 Ω·cm by adjusting the content of Ni.