Journal of Powder Materials (한국분말재료학회지)

The Korean Powder Metallurgy & Materials Institute (한국분말재료학회 (*구 분말야금학회))
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The Effect of TiO2 Addition on Low-temperature Sintering Behaviors in a SnO2-CoO-CuO System

  • Jae-Sang Lee (School of Advanced Materials and Electrical Engineering, Andong National University) ;
  • Kyung-Sik Oh (School of Advanced Materials and Electrical Engineering, Andong National University) ;
  • Yeong-Kyeun Paek (School of Advanced Materials and Electrical Engineering, Andong National University)
  • Received : 2024.03.21
  • Accepted : 2024.04.18
  • Published : 2024.04.28
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Abstract

Pure SnO2 has proven very difficult to densify. This poor densification can be useful for the fabrication of SnO2 with a porous microstructure, which is used in electronic devices such as gas sensors. Most electronic devices based on SnO2 have a porous microstructure, with a porosity of > 40%. In pure SnO2, a high sintering temperature of approximately 1300℃ is required to obtain > 40% porosity. In an attempt to reduce the required sintering temperature, the present study investigated the low-temperature sinterability of a current system. With the addition of TiO2, the compositions of the samples were Sn1-xTixO2-CoO(0.3wt%)-CuO(2wt%) in the range of x ≤ 0.04. Compared to the samples without added TiO2, densification was shown to be improved when the samples were sintered at 950℃. The dominant mass transport mechanism appears to be grain-boundary diffusion during heat treatment at 950℃.

Keywords

Acknowledgement

This research was supported by a Grant from 2023 Research Funds of Andong National University.

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