Journal of Powder Materials (한국분말재료학회지)

The Korean Powder Metallurgy & Materials Institute (한국분말재료학회 (*구 분말야금학회))
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The Effect of Ti Powder addition on Compaction Behavior of TiO2 Nano Powder

Ti 분말 첨가가 TiO2 나노 분말의 성형성에 미치는 영향

  • Park, Jin-Sub (Division of Advanced Materials Engineering, Kongju National University) ;
  • Kim, Hyo-Seob (Division of Advanced Materials Engineering, Kongju National University) ;
  • Lee, Ki-Seok (Division of Mechanical & Automotive Engineering, Kongju National University) ;
  • Lee, Jeong-Goo (Nuclear Materials Research Division, Korea Atomic Energy Research Institute) ;
  • Rhee, Chang-Kyu (Nuclear Materials Research Division, Korea Atomic Energy Research Institute) ;
  • Hong, Soon-Jik (Division of Advanced Materials Engineering, Kongju National University)
  • Published : 2009.06.28
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Abstract

The compaction response of $TiO_2$ nano powders with an addition of Ti powders prepared by magnetic pulsed compaction and subsequent sintering processes was investigated. All kinds of different bulk exhibited an average shrinkage of about 12% for different MPCed pressure and sintering temperature, which were approximately 50% lower than those fabricated by general process (20%) and a maximum density of around 92.7% was obtained for 0.8GPa MPCed pressure and $1400^{\circ}C$ sintering temperature. The addition of Ti powder induced an increase in the formability and hardness of the sintered $TiO_2$. But the lower densities were obtained on sintering with addition of over 10 (wt%) Ti powder due to generation of crack during sintering. Subsequently it was verified that the optimum compaction pressure in MPC and sintering temperature were 0.8GPa and $1400^{\circ}C$, respectively.

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