Articles
  • Effects of adding Y(NO3)3·6H2O on the phase change behavior and thermal conductivity of Aluminum Nitride ceramics

  • Jun Ki Chunga,*, Seongmin Jub and Tae Kwon Haa

  • aCenter for Industrial Technologies of Non-Ferrous Metals, Gangneung-wonju National University, Gangneung 25457, Korea
    bSchool of Electrical Engineering and Computer Science, Gwangju Institute of Science and Technology, Gwangju 61005, Korea

Abstract

The phase change behavior and thermal conductivity of Aluminum nitride (AlN) ceramics with Y(NO3)3·6H2O and Y2O3 as an additive were studied. Sintering was performed in the temperature of 1,900 oC for up to 3 h under a N2 atmosphere to optimize the sintering conditions for each composition. The microstructure and assemblage of the secondary phase have a significant effect on the final thermal conductivity of the sintered AlN. The mechanical property and thermal conductivity of the AlN composition of using the Y2O3 additive were improved by adding Y(NO3)3·6H2O, which decreased the porosity. At 13.56 wt% Y(NO3)3·6H2O, the AlN ceramic exhibited the highest strength of 375 MPa, the highest hardness of 10.60 GPa, and the highest thermal conductivity of 200.2 W/m·K.


Keywords: AlN, Y(NO3)3·6H2O, Phase change behavior, Thermal conductivity, Mechanical property

This Article

  • 2020; 21(1): 1-4

    Published on Feb 28, 2020

  • 10.36410/jcpr.2020.21.1.1
  • Received on Dec 31, 2018
  • Revised on Nov 18, 2019
  • Accepted on Dec 9, 2019

Correspondence to

  • Jun Ki Chung

  • Center for Industrial Technologies of Non-Ferrous Metals, Gangneung-wonju National University, Gangneung 25457, Korea
    Tel : +82-33-640-3018 Fax: +82-33-640-2245

  • E-mail: junki@gwnu.ac.kr