Korean Journal of Materials Research (한국재료학회지)

Materials Research Society of Korea (한국재료학회)
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Synthesis of Potassium Hexatitanate with Non-Fibrous Shape as a Raw Material for Friction Material in Brake System

자동차 브레이크 마찰재용 비침상형 육티탄산칼륨의 합성 연구

  • Lee, Jung Ju (Sangsin Brake R&D Institute, Sangsin Brake Co., Ltd.) ;
  • Lee, Na-Ri (Icheon branch, Korea Institute of Ceramic Engineering & Technology) ;
  • Pee, Jae-Hwan (Icheon branch, Korea Institute of Ceramic Engineering & Technology) ;
  • Kim, Jong-Young (Icheon branch, Korea Institute of Ceramic Engineering & Technology) ;
  • Kim, Jeong-Joo (School of Materials Science and Engineering, Kyungpook National University)
  • 이정주 (상신브레이크 기술연구소) ;
  • 이나리 (한국세라믹기술원 이천분원) ;
  • 피재환 (한국세라믹기술원 이천분원) ;
  • 김종영 (한국세라믹기술원 이천분원) ;
  • 김정주 (경북대학교 신소재공학부)
  • Received : 2016.11.28
  • Accepted : 2017.01.05
  • Published : 2017.03.27
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Abstract

We synthesized potassium hexatitanate, ($K_2Ti_6O_{13}$, PT6), with a non-fibrous shape, by acid leaching and subsequent thermal treatment of potassium tetratitanate ($K_2Ti_4O_9$, PT4), with layered crystal structure. By controlling nucleation and growth of PT4 crystals, we obtained splinter-type crystals of PT6 with increased width and reduced thickness. The optimal holding temperature for the layered PT4 was found to be ${\sim}920^{\circ}C$. The length and width of the PT4 crystals were increased when the nucleation and growth time were increased. After a proton exchange reaction using aqueous 0.3 M HCl solution, and subsequent heat treatment at $850^{\circ}C$, the PT4 crystal transformed into splinter-type PT6 crystals. The frictional characteristics of the friction materials show that as the particle size of PT6 increases, the coefficient of friction (COF) and wear amounts of both the friction materials and counter disc increase.

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References

  1. J.-H. Choy, Y. S. Han and S. W. Song, J. Korean Chem. Soc., 37, 765 (1993).
  2. J.-H. Choy and Y. S. Han, Mater. Lett., 34, 111 (1998). https://doi.org/10.1016/S0167-577X(97)00157-2
  3. T. Endo, H. Nagayama, T. Sato and M. Shimada, J. Mater. Sci.e 23, 694 (1988). https://doi.org/10.1007/BF01174707
  4. T. Oota and H. Saito, J. Crystal Growth, 46, 331 (1979). https://doi.org/10.1016/0022-0248(79)90081-2
  5. S.-O. Kang, H.-S. Jang, Y.-I. Kim, K.-B. Kim and M.-J. Jung, Mater. Lett., 61, 473 (2007). https://doi.org/10.1016/j.matlet.2006.04.091
  6. S. J. Na, H. C. Park and S. H. Kim, J. Korean Soc. Tribol. Lubr. Eng., 31, 42 (2015).
  7. K. H. Cho, M. H. Cho, S. J. Kim and H. Jang, Tribol. Lett., 32, 59 (2008). https://doi.org/10.1007/s11249-008-9362-x
  8. G. Eriksson and A. D. Pelton, Metallurg. Mater. Trans. B, 24, 795 (1993).
  9. M. Eriksson and S. Jacobson, Tribol. Int., 33, 817 (2000). https://doi.org/10.1016/S0301-679X(00)00127-4