Effect of TiO2 addition on the crystallization and tribological properties of MgO-CaO-SiO2-F2O5-F glasses

Date

2008-04-10

Author

Park, Jongee
Öztürk, Abdullah

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The kinetic parameters including the activation energy for crystallization (E), the Avrami parameter (n) and frequency factor (v) of a glass in the MgO-CaO-SiO2-P2O5-F system were studied using non-isothermal differential thermal analysis (DTA) with regard to small amount of TiO2 additions. It has been shown that the role of TiO2 changes from a glass network former to a glass network modifier with increasing TiO2 content in this system. The kinetic parameters of the crystallizing phases, apatite and wollastonite, indicated changes accompanied with TiO2 additions, implying that the TiO2 is an effective nucleating agent for promoting the crystallization of apatite and wollastonite. The most effective addition is of about 4 wt% TiO2 in this system. The wear rate and friction coefficient decreased from 1.8 +/- 0.1 to 0.9 +/- 0.2 and 0.87 to 0.77, respectively, when 4 wt% TiO2 was incorporated to the base glass. (C) 2008 Elsevier B.V All rights reserved.

Subject Keywords

Glass ceramics, TiO2, Crystallization, Kinetics, Wear

URI

https://hdl.handle.net/11511/41818

Journal

THERMOCHIMICA ACTA

DOI

https://doi.org/10.1016/j.tca.2008.01.018

Collections

Department of Metallurgical and Materials Engineering, Article

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Citation Formats

J. Park and A. Öztürk, “Effect of TiO2 addition on the crystallization and tribological properties of MgO-CaO-SiO2-F2O5-F glasses,” THERMOCHIMICA ACTA, pp. 60–66, 2008, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/41818.