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http://dx.doi.org/10.3740/MRSK.2017.27.3.132

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

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)
Publication Information
Korean Journal of Materials Research / v.27, no.3, 2017 , pp. 132-136 More about this Journal
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.
Keywords
potassium titanate; non-fibrous; friction materials; raw materials; brake pad;
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