자동차 브레이크 마찰재용 비침상형 육티탄산칼륨의 합성 연구

이정주; 이나리; 피재환; 김종영; 김정주; Jung Ju Lee; Na-Ri Lee; Jae-Hwan Pee; Jong-Young Kim; Jeong-Joo Kim

Korean Journal of Materials Research, Vol.27, No.3, 132-136, March, 2017

DOI10.3740/MRSK.2017.27.3.132 Export Citation

자동차 브레이크 마찰재용 비침상형 육티탄산칼륨의 합성 연구

Synthesis of Potassium Hexatitanate with Non-Fibrous Shape as a Raw Material for Friction Material in Brake System

이정주^{1, 2}, 이나리³, 피재환³, 김종영^{3, †}, 김정주^{2, †}

¹상신브레이크 기술연구소
²경북대학교 신소재공학부
³한국세라믹기술원 이천분원

Jung Ju Lee^{1, 2}, Na-Ri Lee³, Jae-Hwan Pee³, Jong-Young Kim^{3, †}, and Jeong-Joo Kim^{2, †}

¹Sangsin Brake R&D Institute, Sangsin Brake Co., Ltd., Daegu 43023, Republic of Korea
²School of Materials Science and Engineering, Kyungpook National University, Daegu 41566, Republic of Korea
³Icheon branch, Korea Institute of Ceramic Engineering & Technology, Icheon 17303, Republic of Korea

E-mail:,

We synthesized potassium hexatitanate, (K2Ti6O13, PT6), with a non-fibrous shape, by acid leaching and subsequent thermal treatment of potassium tetratitanate (K2Ti4O9, 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 ~920 °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 °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.

Keywords:potassium titanate;non-fibrous;friction materials;raw materials;brake pad

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[1] Choy JH, Han YS, Song SW, J. Korean Chem. Soc., 37, 765 (1993)

[2] Choy JH, Han YS, Mater. Lett., 34, 111 (1998)

[3] Endo T, Nagayama H, Sato T, Shimada M, J. Mater. Sci., 23, 694 (1988)

[4] Oota T, Saito H, J. Cryst. Growth, 46, 331 (1979)

[5] Kang SO, Jang HS, Kim YI, Kim KB, Jung MJ, Mater. Lett., 61, 473 (2007)

[6] Na SJ, Park HC, Kim SH, J. Korean Soc. Tribol. Lubr. Eng., 31, 42 (2015)

[7] Cho KH, Cho MH, Kim SJ, Jang H, Tribol. Lett., 32, 59 (2008)

[8] Eriksson G, Pelton AD, Metall. Mater. Trans. B-Proc. Metall. Mater. Proc. Sci., 24, 795 (1993)

[9] Eriksson M, Jacobson S, Tribol. Int., 33, 817 (2000)