Potassium hexatitanate (K2Ti6O13) fibers are fabricated by the flux and melt methods. The crystal structure of this fiber is characterized by a tunnel structure consisting of the chains sharing the edges and corners of TiO2 octahedra along the b-axis. The K2Ti6O13 fibers have high chemical stability and water resistance. Mechanical strength such as the bending strength, Young's modulus and thermal expansion coefficient, and thermal conductivity of the sintered potassium hexatitanates were measured. Especially, the thermal conductivity at high temperatures indicated to be very superior as the heat insulator. The improvements of the automototive brake lining material have been achieved through the replacement of asbestos by potassium titanate fibers. According to a NASA-report, the best low-cost composite formulation exhibits an essentially constant coefficient of friction with temperature to 650 F, and the average coefficient is approximately 0.34. The wear is equal to the standard at low temperature and 46 percent better between 400 and 650 F. The acoustic absorptivity of K2Ti6O13 fibers was roughly measured, and the results were expected to be utilized as the acoustic absorbing materials at high temperatures.
Application of potassium hexatitanate fibers to automotive materials
Anwendung von Kalium-Hexatitanat-Fasern bei Automobilwerkstoffen
JSAE Review ; 6 ; 91-97
1981
7 Seiten, 9 Bilder, 5 Tabellen, 23 Quellen
Aufsatz (Zeitschrift)
Englisch
Application of Potassium Hexatitanate Fibers to Automotive Materials
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