Advanced Search
ZHANG Haihui, SUN Juan, SUN Li. Effect of Fe Powder Content on Microstructure and Electrical Conductivity of Vacuum Sintered NiAl2O3 Electronic Material[J]. CHINESE JOURNAL OF VACUUM SCIENCE AND TECHNOLOGY, 2021, 41(6): 586-590. DOI: 10.13922/j.cnki.cjvst.202002012
Citation: ZHANG Haihui, SUN Juan, SUN Li. Effect of Fe Powder Content on Microstructure and Electrical Conductivity of Vacuum Sintered NiAl2O3 Electronic Material[J]. CHINESE JOURNAL OF VACUUM SCIENCE AND TECHNOLOGY, 2021, 41(6): 586-590. DOI: 10.13922/j.cnki.cjvst.202002012

Effect of Fe Powder Content on Microstructure and Electrical Conductivity of Vacuum Sintered NiAl2O3 Electronic Material

  • The vacuum sintering process was selected to prepare NiAl2O3, and Fe powder was added to obtain excellent conductivity of the sample. The phase composition, microstructure, and electromagnetic properties of the alloy were tested by experiments. The results show that after increasing Fe content gradually, a stronger Fe diffraction peak is formed, and NiAl2O3 diffraction peak intensity decreases. Fe and NiAl2O3 form a good compatibility state, and NiAl2O3/Fe sample with excellent high-temperature stability is prepared. After increasing the amount of Fe, the porosity of the matrix microstructure decreases, which makes the alloy microstructure reach a more compact state. When a higher proportion of Fe is added, the sample shows a positive reactance value, showing obvious sensitivity resistance, and the positive reactance value and frequency show an increasing trend. The increase in frequency results in a significant increase in resistance and a decrease in conductivity. The NiAl2O3 alloy without Fe powder added does not show prominent magnetic properties. When Fe content is low, the sample obtains paramagnetism. After increasing the amount of Fe, the sample shows apparent dispersion. The sample with the Fe content of 40% forms an evident relaxation magnetic spectrum with diamagnetism and realizes the double negative property.
  • loading

Catalog

    Turn off MathJax
    Article Contents

    /

    DownLoad:  Full-Size Img  PowerPoint
    Return
    Return